Test system and method for flow field measurement of guide cylinder assembly

Abstract

The invention provides a test system and method for flow field measurement of a guide cylinder assembly, and relates to the field of flow field measurement of guide cylinder assemblies. The test system for measuring the flow field of the guide cylinder assembly comprises a measurement model, the measurement model comprises an assembly model which is scaled down according to the guide cylinder assembly, and the assembly model is at least provided with a first liquid outlet and a second liquid outlet at different heights, when liquid flows through the assembly model and flows out from the first liquid outlet and the second liquid outlet, a plurality of assembly model flow fields are suitable for being formed in the assembly model, and the plurality of assembly model flow fields respectively correspond to the guide cylinder assemblies in different areas of the reactor; the data acquisition equipment is suitable for acquiring a plurality of pieces of data information of a plurality of preset measurement areas in the component model; and the data processing equipment is in communication connection with the data acquisition equipment, and the data processing equipment is suitable for generating measurement flow field data according to the multiple pieces of data information of each preset measurement area.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the field of guide tube assembly flow field measurement, and particularly relates to a test system and method for guide tube assembly flow field measurement. BACKGROUND

[0002] The guide tube assembly in the reactor contains a large number of heavy guide tube assemblies, the internal mechanical components of the guide tube assembly are complex and precise, and the size precision is high. The guide tube assemblies at different positions of the reactor often have different flow field characteristics, and therefore it is difficult to simulate and obtain the flow field information of the guide tube assemblies at different positions by a simple and effective test system. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a test system and method for guide tube assembly flow field measurement, to simulate the flow field of the guide tube assemblies at different positions of the reactor, and to obtain the flow field information of the guide tube assemblies.

[0004] To solve the above technical problem, the present application provides a test system for guide tube assembly flow field measurement, which is suitable for simulating the flow field of a liquid flowing through a guide tube device of a reactor, the guide tube device including a plurality of guide tube assemblies located at different positions of the reactor, each guide tube assembly including a plurality of control rods, the test system including: a measurement model, the measurement model including a component model scaled down in proportion to the guide tube assembly, the component model being provided with at least a first liquid outlet and a second liquid outlet at different heights, when the liquid flows through the component model and flows out from the first liquid outlet and the second liquid outlet, a plurality of component model flow fields are formed in the component model, and the plurality of component model flow fields correspond to the guide tube assemblies located at different regions of the reactor respectively; a data acquisition device, suitable for acquiring a plurality of data information of a plurality of preset measurement regions in the component model; and a data processing device, in communication connection with the data acquisition device, the data processing device being suitable for generating measurement flow field data according to the plurality of data information of each preset measurement region.

[0005] Optionally, the component model is adapted to form a first component model flow field, a second component model flow field and a third component model flow field, wherein when the liquid flows out only from the first liquid outlet, the component model is adapted to form the first component model flow field, the first component model flow field corresponding to the guide tube assembly located at the central region of the reactor; when the liquid flows out only from the second liquid outlet, the component model is adapted to form the second component model flow field, the second component model flow field corresponding to the guide tube assembly located at the edge region of the reactor; and when the liquid flows out from the first liquid outlet and the second liquid outlet at the same time, the component model is adapted to form the third component model flow field, the third component model flow field corresponding to the guide tube assembly located between the edge region and the central region.

[0006] Optionally, the measurement model is further provided with a liquid inlet at the bottom end of the component model, and the test system further comprises: a circulating liquid tank storing liquid; and a driving pump connected between the circulating liquid tank and the component model, the driving pump being adapted to drive the liquid to flow out of the circulating liquid tank and into the liquid inlet, so that the liquid flows through the component model from bottom to top.

[0007] Optionally, the test system further comprises: a first connecting pipe, one end of the first connecting pipe being connected to the outlet of the driving pump, and the other end of the first connecting pipe being connected to the liquid inlet; a second connecting pipe, one end of the second connecting pipe being connected to the first connecting pipe, and the other end of the second connecting pipe being connected to the circulating liquid tank, the second connecting pipe being adapted to guide at least part of the liquid flowing through the first connecting pipe into the circulating liquid tank; and a bypass valve arranged on the second connecting pipe, the bypass valve being adapted to control the second connecting pipe to be open or closed.

[0008] Optionally, the test system further comprises: a post-pump valve arranged on the first connecting pipe and located between the outlet of the driving pump and one end of the second connecting pipe, the post-pump valve being adapted to control the first connecting pipe to be open or closed.

[0009] Optionally, the test system further comprises: a third connecting pipe, one end of the third connecting pipe being connected to the first liquid outlet, the third connecting pipe being adapted to guide the liquid flowing out of the first liquid outlet into the circulating liquid tank; a first liquid outlet valve arranged on the third connecting pipe, the first liquid outlet valve being adapted to control the third connecting pipe to be open or closed; a fourth connecting pipe, one end of the fourth connecting pipe being connected to the second liquid outlet, the fourth connecting pipe being adapted to guide the liquid flowing out of the second liquid outlet into the circulating liquid tank; and a second liquid outlet valve arranged on the fourth connecting pipe, the second liquid outlet valve being adapted to control the fourth connecting pipe to be open or closed.

[0010] Optionally, the test system further comprises: a fifth connecting pipe, one end of the fifth connecting pipe being connected to the other end of the third connecting pipe and the other end of the fourth connecting pipe respectively, and the other end of the fifth connecting pipe extending into the circulating liquid tank, the fifth connecting pipe being adapted to guide the liquid flowing out of the first liquid outlet and / or the second liquid outlet into the circulating liquid tank; and a flow meter arranged on the fifth connecting pipe, the flow meter being adapted to measure flow data of the liquid flowing through the fifth connecting pipe.

[0011] Optionally, the plurality of preset measurement regions comprises a plurality of first preset measurement regions, the first preset measurement regions comprise components of transparent material, the liquid flowing through the measurement model comprises tracer particles, the data information corresponding to the first preset measurement regions comprises flow field images, the data acquisition device comprises a visualization acquisition sub-device, the visualization acquisition sub-device comprises: a laser adapted to emit laser light to irradiate the first preset measurement regions; and a camera adapted to acquire a plurality of flow field images corresponding to the first preset measurement regions when the liquid flows through the first preset measurement regions irradiated by the laser light, the flow field images comprising the tracer particles displayed by the laser light; and the data processing device is adapted to generate actual flow field data corresponding to each of the first preset measurement regions according to the plurality of flow field images, the measurement flow field data comprising the actual flow field data.

[0012] Optionally, the guide cylinder assembly comprises a core upper plate, the core upper plate comprises a flow hole, the flow hole comprises at least one first flow hole, the first flow hole is circular, the component model comprises a core upper plate model that is proportionally reduced from the core upper plate, the core upper plate model is provided with a first to-be-measured flow hole, the first to-be-measured flow hole is proportionally reduced from the first flow hole; the preset measurement region comprises a second preset measurement region, the second preset measurement region comprises the first to-be-measured flow hole, the data information corresponding to the first to-be-measured flow hole comprises dynamic pressure data; the data acquisition device comprises: at least one detection mechanism, the detection mechanism comprises a measurement module, the measurement module comprises a probe end, the probe end is adapted to extend into the first to-be-measured flow hole to be measured and move along a preset route, so that the measurement module generates a plurality of dynamic pressure data of a plurality of preset points located on the preset route in the first to-be-measured flow hole; and the data processing device is adapted to calculate the measurement flow data of the first to-be-measured flow hole according to the plurality of dynamic pressure data of the first to-be-measured flow hole, and proportionally convert the measurement flow data to obtain actual flow data of the first flow hole corresponding to the first to-be-measured flow hole, the measurement flow field data comprising the actual flow data.

[0013] Optionally, the measurement module further comprises a Pitot tube and a differential pressure transmitter, wherein: the Pitot tube has a first end and a second end, the first end being the probe end; the differential pressure transmitter is connected to the second end of the Pitot tube, and the differential pressure transmitter is adapted to generate dynamic pressure data of a preset point when the liquid flows through the first to-be-measured flow hole and the first end is located at the preset point.

[0014] Optionally, a ratio of a diameter of the Pitot tube to a diameter of the corresponding first to-be-measured flow hole is not greater than 0.02.

[0015] Optionally, the data processing device is further configured to calculate the measurement flow data Q of the first to-be-measured flow hole q according to the following formula: Wherein, ΔP is the dynamic pressure data of a preset point of the first flow hole q to be measured, ρ is the density of the liquid, K is the pitot tube correction coefficient, f(u) is the flow rate of the preset point, h is the dimensionless number of the moving distance after equal division and the radius, m is the total number of the preset points, f(u 2i ) is the flow rate of the second preset point, f(u m ) respectively corresponds to the preset point closest to the starting point and the ending point of the preset route, is the average flow rate of the first flow hole q to be measured, and A is the flow area of the first flow hole q to be measured.

[0016] To solve the above technical problems, the application provides a test method for measuring the flow field of a guide cylinder assembly, which is suitable for the test system for measuring the flow field of the guide cylinder assembly and is used to obtain the measurement flow field data corresponding to the guide cylinder assembly of a specified area of a reactor, and the test method comprises the following steps: making the liquid flow through the measurement model and making the assembly model form an assembly model flow field corresponding to the guide cylinder assembly of the specified area; collecting, by a data acquisition device, a plurality of data information of a plurality of preset measurement areas in the assembly model; and generating, by a data processing device, the measurement flow field data according to the plurality of data information of each preset measurement area.

[0017] Optionally, the test system further comprises a circulating liquid tank, a driving pump, a first connecting pipe, a second connecting pipe, a bypass valve, a post-pump valve, a third connecting pipe, a first liquid outlet valve, a fourth connecting pipe, a second liquid outlet valve, a fifth connecting pipe and a flow meter, the flow rate of the assembly model flow field is a preset flow rate, and the step of making the liquid flow through the measurement model and making the assembly model form the assembly model flow field corresponding to the guide cylinder assembly of the specified area further comprises the following steps: opening the first liquid outlet valve and / or the second liquid outlet valve according to the guide cylinder assembly of the specified area; opening the post-pump valve and the bypass valve; starting the driving pump to make the liquid in the circulating liquid tank flow through the second connecting pipe or the assembly model and then reflow into the circulating liquid tank, wherein the liquid flowing through the second connecting pipe and then flowing into the circulating liquid tank is used to gradually exhaust the gas mixed in the liquid flowing into the assembly model; after it is determined that the liquid flowing into the assembly model is not mixed with gas, the bypass valve is closed; the rotating speed of the driving pump is increased to make the flow data measured by the flow meter higher than the preset flow rate; and the opening degree of the bypass valve is adjusted to make the flow data equal to the preset flow rate.

[0018] Compared with the prior art, the application has the following advantages: by opening the first liquid outlet and the second liquid outlet at different heights of the assembly model, the assembly model flow field of the assembly model corresponds to the flow field of the guide cylinder assembly in different areas of the reactor when the liquid flowing through the assembly model flows out from the first liquid outlet and the second liquid outlet, so that the flow process of different guide cylinder assemblies can be simulated by a single assembly model, and the flow process simulation of the guide cylinder assembly is simple and effective. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the principles of the present application. In the drawings:

[0020] Figure 1 is a schematic view of a guide tube assembly in a reactor according to an embodiment of the present application;

[0021] Figure 2 is a schematic view of a test system according to an embodiment of the present application;

[0022] Figure 3 is a schematic view of four first preset measurement regions of a component model in Figure 2

[0023] Figure 4 is a schematic view of a guide tube assembly in Figure 1

[0024] Figure 5 is a schematic view of a top plate of a reactor core in Figure 4

[0025] Figure 6 is a schematic view of a detection mechanism and a component model of a top plate of a reactor core in Figure 2

[0026] Figure 7 is a schematic view of a detection mechanism and a component model of a top plate of a reactor core in Figure 6

[0027] Figure 8 is a flowchart of a test method for measuring a flow field of a guide tube assembly using a test system shown in Figure 2

[0028] Figure 9 is a flowchart of a test method for measuring a flow field of a guide tube assembly using a test system shown in Figure 8

[0029] Reference Signs:

[0030] ​​​​​​​Test system 100, circulating liquid tank 1, sixth connecting pipe 2, pre-pump valve 3, driving pump 4, frequency converter 5, first connecting pipe 6, second connecting pipe 7, first tee joint 8, first end 81 of first tee joint, second end 82 of first tee joint, third end 83 of first tee joint, post-pump valve 9, bypass valve 10, measuring model 11, component model 111, first liquid outlet 31, second liquid outlet 32, first water flow hole to be measured 33, second water flow hole to be measured 34, upper core plate model 35, third connecting pipe 12, first liquid outlet valve 13, fourth connecting pipe 14, second liquid outlet valve 15, second tee joint 16, first end 161 of second tee joint, second end 162 of second tee joint, third end 163 of second tee joint, fifth connecting pipe 17, flowmeter 18, data acquisition device 19, visualization sub-device 191, laser 192, camera 193, detection mechanism 194, measuring module 195, pitot tube 41, first end 411, second end 412, connecting pipe 42, differential pressure transmitter 43, moving module 196, slide rail 51, connecting seat 52, driving member 53, knob 531, data processing device 20, guide thimble device 200, guide thimble assembly 21, upper core plate 211, first water flow hole 221, second water flow hole 222, guide thimble 212, support column 213, upper tube seat 214, control rod 215, control rod guide and spacer region 61, region 62 corresponding to the height of the water flow hole of the guide thimble housing, region 63 between the upper core plate and the flange of the guide thimble, and region 64 of the upper tube seat. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some examples or embodiments of the present application, and those skilled in the art can also apply the present application to other similar scenarios without creative labor on the basis of the drawings. Unless the context clearly indicates otherwise or otherwise stated, the same reference numerals in the drawings represent the same structures or operations.

[0032] As shown in the present application and claims, unless the context clearly indicates otherwise or otherwise stated, the words “one”, “a”, “an”, and / or “the” do not specifically refer to the singular, but can also include the plural. Generally speaking, the terms “comprise” and “include” only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0033] The foregoing is a summary and thus contains only the most basic embodiment. The application can be practiced with the specific embodiments and options described herein, and it can also be practiced without such specific embodiments and options. Furthermore, the preceding description and drawings should not be construed as limiting the application. Numerous and various embodiments can be derived from this description without departing from the application. The description and drawings are illustrative only, and the scope of the application is defined only by the appended claims. The embodiments described herein are intended to be merely illustrative of the principles of the application. Numerous modifications may

[0034] In the description of the present application, it should be understood that the orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0035] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the example term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0036] Moreover, it should be noted that the use of "first", "second", etc. words to define parts is merely for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, although the terms used in the present application are selected from commonly known terms, some terms mentioned in the specification of the present application may be selected by the applicant according to his or her judgment, and the detailed meaning thereof is described in the relevant part of the description. In addition, the present application is required to be understood not only by the actual terms used, but also by the meaning implied by each term.

[0037] It should be understood that when a component is referred to as being "on", "connected to", "coupled with", or "contacting" another component, it can be directly on, connected to, coupled with, or contacting the other component, or one or more intervening components can also be present. In contrast, when a component is referred to as being "directly on", "directly connected to", "directly coupled with", or "directly contacting" another component, there are no intervening components present. Similarly, when a first component is referred to as being "electrically contacting" or "electrically coupled with" a second component, there is an electrical path between the first component and the second component that allows current to flow. The electrical path can include capacitors, coupled inductors, and / or other components that allow current to flow, even without direct contact between electrically conductive components.

[0038] First, Figure 1 is a top view schematic diagram of a reactor in-guide tube device according to an embodiment of the present application. As Figure 1 shown, the reactor in-guide tube device 200 includes a plurality of guide tube assemblies 21 located at different positions in the reactor, and each guide tube assembly 21 includes a guide tube and a plurality of control rods located in the guide tube. The liquid flows through the guide tube assemblies 21 from bottom to top in the reactor, and the liquid is water in this embodiment. Due to the large number of guide tube assemblies 21 and the close proximity between them, and the liquid entering and exiting the guide tube assemblies 21 from the gaps between the components of the guide tube assemblies 21, the flow fields of the guide tube assemblies 21 interact with each other, resulting in different flow fields for the guide tube assemblies 21 located at different positions. Under the action of the flow field, the corresponding guide tubes and control rods of the guide tube assemblies 21 located at different positions also have different mutual abrasion caused by the hydraulic load of the liquid. Therefore, fluid mechanics analysis methods are generally used to study and analyze the mutual abrasion of the guide tubes and control rods by the liquid. The accuracy of the modeling of the fluid mechanics analysis method needs to be verified by the data of the simulation experiment. However, the existing simulation model is difficult to simulate the guide tube assemblies at different positions concisely and effectively, and thus the corresponding measured flow field data cannot be collected.

[0039] To address the aforementioned issues, this embodiment provides an experimental system for measuring the flow field of a guide tube assembly. (Refer to...) Figure 2 The test system 100 is suitable for simulating the flow field of liquid flowing through the guide tube device of a reactor. Specifically, the test system 100 includes a circulating liquid tank 1, a sixth connecting pipe 2, a pre-pump valve 3, a drive pump 4, a frequency converter 5, a first connecting pipe 6, a second connecting pipe 7, a first tee 8, a post-pump valve 9, a bypass valve 10, a measurement model 11, a third connecting pipe 12, a first liquid outlet valve 13, a fourth connecting pipe 14, a second liquid outlet valve 15, a second tee 16, a fifth connecting pipe 17, a flow meter 18, a data acquisition device 19, and a data processing device 20, wherein the measurement model 11 includes components according to... Figure 1 The guide cylinder assembly 21 is a scaled-down component model 111, and the measuring model 11 also has a liquid inlet at the bottom of the component model 111. Specifically, the circulating liquid tank 1 stores liquid. In this embodiment, the liquid is water. The sixth connecting pipe 2 connects the outlet of the circulating liquid tank 1 and the inlet of the drive pump 4. The pump inlet valve 3 is adapted to control the opening or closing of the sixth connecting pipe 2. In this embodiment, when the drive pump 4 needs maintenance, the pump inlet valve 3 is closed to prevent the liquid in the circulating liquid tank 1 from flowing into the drive pump 4. One end of the first connecting pipe 6 is connected to the outlet of the drive pump 4, and the other end of the first connecting pipe 6 is connected to the liquid inlet. In this embodiment, the drive pump 4 is adapted to drive the liquid to flow out from the outlet of the circulating liquid tank 1 and into the liquid inlet, so that the liquid flows from bottom to top through the component model 111. The frequency converter 5 is electrically connected to the drive pump 4, and the frequency converter 5 is adapted to control the operating frequency of the drive pump 4 to change the speed of the drive pump 4. In this embodiment, the drive pump 4 is connected to the ground by expansion bolts to reduce the vibration generated when the drive pump 4 is working. In this embodiment, a flexible connector is also connected between the first connecting pipe 6 and the liquid inlet. This flexible connector is made of shock-absorbing rubber and can isolate the impact of the vibration of the drive pump 4 on the liquid flowing into the component model 111. The same flexible connector is also present between the circulating liquid tank 1 and the sixth connecting pipe 2 in this embodiment. Furthermore, the liquid inlet in this embodiment has multiple dense circular channels machined from stainless steel, ensuring uniform flow of liquid into the component model 111 from the first connecting pipe 6.

[0040] Continue to refer to Figure 2The first three-way pipe 8 is arranged on the first connecting pipe 6. Specifically, the first three-way pipe 8 comprises a first three-way pipe first end 81, a first three-way pipe second end 82 and a first three-way pipe third end 83. The first three-way pipe first end 81 is close to the driving pump 4, and the first three-way pipe third end 83 is close to the liquid inlet. One end of the second connecting pipe 7 is connected with the first three-way pipe second end 82 and then connected with the first connecting pipe 6, and the other end of the second connecting pipe 7 is connected with the circulating liquid tank 1. The second connecting pipe 7 is adapted to guide at least part of the liquid flowing through the first connecting pipe 6 into the circulating liquid tank 1. It should be noted that the position where the second connecting pipe 7 is connected with the circulating liquid tank 1 is higher than the liquid surface position in the circulating liquid tank 1, so that the liquid in the circulating liquid tank 1 cannot flow into the first connecting pipe 6 through the second connecting pipe 7. The post-pump valve 9 is arranged on the first connecting pipe 6 and located between the outlet of the driving pump 4 and one end of the second connecting pipe 7, i.e. between the driving pump 4 and the first three-way pipe first end 81. The post-pump valve 9 is adapted to control the opening or closing of the first connecting pipe 6. In this embodiment, the post-pump valve 9 is set as always open. When the measurement model 11 needs to be adjusted, the post-pump valve 9 is closed so that the liquid in the circulating liquid tank 1 cannot flow to the measurement model 11 through the first connecting pipe 6. The bypass valve 10 is arranged on the second connecting pipe 7, and the bypass valve 10 is adapted to control the opening or closing of the second connecting pipe 7.

[0041] With reference to the foregoing Figure 1 and Figure 2 , the component model 111 is provided with a first liquid outlet 31 and a second liquid outlet 32 at different heights, and the first liquid outlet 31 is higher than the second liquid outlet 32. When the liquid flows through the component model 111 and flows out from the first liquid outlet 31 and the second liquid outlet 32, a plurality of component model flow fields are adapted to be formed in the component model 111. The plurality of component model flow fields correspond to the guide tube assemblies 21 located in different regions of the reactor, respectively. Specifically, in this embodiment, the guide tube assemblies 21 with the same or similar flow fields in the guide tube device 200 are divided into the same group according to the different flow fields. In this embodiment, the guide tube assemblies 21 outside the larger dashed box in Figure 1 are taken as the guide tube assemblies 21 located in the edge region of the reactor, the guide tube assemblies 21 inside the smaller dashed box in Figure 1 are taken as the guide tube assemblies 21 located in the central region of the reactor, and the guide tube assemblies 21 between the larger dashed box and the smaller dashed box in Figure 1 are taken as the guide tube assemblies 21 located between the edge region and the central region. It should be noted that Figure 1 only exemplarily shows the distribution of the guide tube assemblies 21, and the arrangement mode of the guide tube assemblies in the reactor is not limited in the present application.

[0042] Corresponding to the division of the guide tube assemblies 21 described above, the assembly model 111 is adapted to form a first assembly model flow field, a second assembly model flow field, and a third assembly model flow field. Specifically, when liquid flows out only from the first liquid outlet 31, the assembly model 111 is adapted to form the first assembly model flow field, and the first assembly model flow field corresponds to the guide tube assemblies 21 located in the central region of the reactor, at which time the liquid flows out directly from above the assembly model 111. When liquid flows out only from the second liquid outlet 32, the assembly model 111 is adapted to form the second assembly model flow field, and the second assembly model flow field corresponds to the guide tube assemblies 21 located in the edge region of the reactor, at which time the liquid flows out directly from the side of the assembly model 111. When liquid flows out from both the first liquid outlet 31 and the second liquid outlet 32, the assembly model 111 is adapted to form the third assembly model flow field, and the third assembly model flow field corresponds to the guide tube assemblies 21 located between the edge region and the central region, at which time the liquid flows out from both above and from the side of the assembly model 111.

[0043] With continued reference to Figure 2The third connecting pipe 12 has one end connected with the first liquid outlet 31 and the other end connected with the second three-way pipe first end 161 of the second three-way pipe 16. The first liquid outlet valve 13 is arranged on the third connecting pipe 12 and is adapted to control the third connecting pipe 12 to be open or closed. The fourth connecting pipe 14 has one end connected with the second liquid outlet 32 and the other end connected with the second three-way pipe second end 162 of the second three-way pipe 16. The second liquid outlet valve 15 is arranged on the fourth connecting pipe 14 and is adapted to control the fourth connecting pipe 14 to be open or closed. The fifth connecting pipe 17 has one end connected with the second three-way pipe third end 163 of the second three-way pipe 16, i.e. one end of the fifth connecting pipe 17 is connected with the other end of the third connecting pipe 12 and the other end of the fourth connecting pipe 14 respectively, and the other end of the fifth connecting pipe 17 extends into the circulating liquid tank 1. In the embodiment, the circulating liquid tank 1 is not closed at the top, and the fifth connecting pipe 17 extends into the circulating liquid tank 1 from the top of the circulating liquid tank 1. The fifth connecting pipe is adapted to guide the liquid flowing out of the first liquid outlet 31 and / or the second liquid outlet 32 to re-enter the circulating liquid tank 1. The flow meter 18 is arranged on the fifth connecting pipe 17 and is in communication connection with the data processing device 20, and the flow meter 18 is adapted to measure the flow data of the liquid flowing through the fifth connecting pipe 17 and send the flow data to the data processing device 20. It should be noted that, since the first liquid outlet 31 and the second liquid outlet 32 are all the water outlets of the component model 111 in the embodiment, the flow of the liquid flowing through the fifth connecting pipe 17 is the total flow of the component model 111. In addition, the sixth connecting pipe 2, the first connecting pipe 6, the second connecting pipe 7, the third connecting pipe 12, the fourth connecting pipe 14 and the fifth connecting pipe 17 are provided with flanges corresponding to the connected parts to be connected. It should be noted that, in order to reduce the influence of vibration on data acquisition, the measurement model 11 and the circulating liquid tank 1 are fixedly connected with six steel shapes, and each steel shape is fixedly connected with the ground and the roof by expansion screws, so as to reduce the vibration of the measurement model 11 and the circulating liquid tank 1 when the liquid flows at a high speed.

[0044] With reference to the foregoing Figure 2 , the data acquisition device 19 includes a visualization sub-device 191 and two detection mechanisms 194. The visualization sub-device 191 is adapted to acquire data information corresponding to a plurality of first preset measurement regions, wherein the data information includes flow field images. With further reference to Figure 3 , the first preset measurement regions in the embodiment include four dashed box regions in Figure 3 , and the four dashed box regions correspond to Figure 1the control rod guide cartridge assembly 21, the region 62 corresponding to the height of the water hole of the guide cartridge shell, the region 63 between the upper core plate and the flange of the guide cartridge, and the region 64 of the upper nozzle. In the embodiment, the first preset measurement region comprises a component of transparent material, and the liquid flowing through the component model 111 comprises tracer particles, so that the actual flow field data of each first preset measurement region is obtained by the particle image velocimetry method of the visualization sub-device 191. Specifically, in the component model 111 of the embodiment, the flange is made of stainless steel to ensure that it does not deform under the impact of high-speed liquid and has a certain strength; the corresponding models of the control rod 215, the C-shaped tube, the sheath plate, etc. are fixedly connected to the flange by gluing, and the transparent organic glass material is used in the first preset measurement region and the stainless steel material is used outside the first preset measurement region, wherein the parts of different materials corresponding to the control rod are combined by threads and are reinforced by gluing on the surface; the base of the corresponding model of the support column 213 is made of transparent organic glass, the column body is made of stainless steel and is black by oxidation treatment, thereby having the effect of light absorption to avoid the influence of reflected strong light on image acquisition, the base and the column body are connected by bolts and are fixedly connected to the corresponding model of the upper core plate 211 by bolts; the corresponding model of the upper nozzle 214 is made of transparent organic glass material and is fixed in the measurement model 11 by a pin; the corresponding model of the grid plate is made of transparent organic glass material and is also positioned and fixed by a pin.

[0045] With reference back to Figure 2 The visualization sub-device 191 comprises a laser 192 and a camera 193. The laser 192 is adapted to emit laser light to irradiate the first preset measurement region. The camera 193 is adapted to capture a plurality of flow field images corresponding to the first preset measurement region when the liquid flows through the first preset measurement region irradiated by the laser light, wherein the flow field images comprise tracer particles displayed by the laser light. In the embodiment, the data processing device 20 is adapted to generate actual flow field data corresponding to each first preset measurement region according to the plurality of flow field images. In the embodiment, the laser 192 and the camera 193 are both installed on a three-dimensional moving platform, so that the position and pose of the laser 192 and the camera 193 can be conveniently adjusted around the component model 111, thereby capturing the flow field images of each first preset measurement region. It should be noted that the actual flow field data of the control rod guide cartridge assembly 21 is not the focus of the present application, and will not be described here. Figure 1

[0046] Before the detection mechanism 194 is described below, reference is made to Figure 4 The partial structure of the guide cartridge assembly 21 is described in detail. As shown in Figure 4 ​As shown, the guide tube assembly 21 includes a core upper plate 211, two guide tubes 212, a support column 213, an upper tube seat 214, and multiple control rods 215. It should be noted that the liquid flowing in the reactor flows through the guide tube assembly 21 in the direction a, i.e., from bottom to top. Further reference... Figure 5 The core plate 211 has two circular first water inlets 221 and two non-circular second water inlets 222. The second water inlets 222 are rectangular water inlets with rounded corners, and both second water inlets 222 have the same dimensions. (Continue referring to...) Figure 4 Two guide tubes 212 are respectively located above two second water inlets 222. The guide tubes 212 are used to place and fix control rods 215. In this embodiment, each guide tube 212 is provided with 24 control rods 215. A support column 213 is located above a first water inlet 221, and one end of the support column 213 contacts the upper surface of the core plate 211. The support column 213 is used to maintain the mechanical integrity of the upper core structure and serves as a channel for core monitoring. In this embodiment, the support column 213 is located directly above the first water inlet 221. The upper tube seat 214 is located below the core plate 211 and is the upper component of the core fuel. It can be understood that in this embodiment, the control rods 215 extend from below the guide tubes 212 and pass through the corresponding second water inlets 222 and the upper tube seat 214 in sequence, thereby approaching the core fuel below the upper tube seat 214 to control the reaction degree of the core fuel. Accordingly, in this embodiment, the component model 111 includes components according to Figure 4 The core plate model 211 is a scaled-down version of the core plate model. The core plate model has two first test flow holes and two second test flow holes. The first test flow holes are scaled down proportionally to the first flow hole 221, and the second test flow holes are scaled down proportionally to the second flow hole 222. In this embodiment, the diameters of the two first test flow holes are 36.5 mm and 39.8 mm, respectively. In this embodiment, it is necessary to obtain the flow field information of the first test flow hole corresponding to the first test flow hole 221 and the flow field information of the second test flow hole corresponding to the second test flow hole 222. Therefore, it is understood that in this embodiment, the component model 111 also includes corresponding models of various components in the guide tube assembly 21 that affect the flow field of the core plate 211, so that the flow field of the core plate model corresponds to the flow field of the core plate 211.

[0047] It should be noted that in the embodiment, the two second flow holes 222 correspond to the guide cylinder 212, the upper tube seat 214 and the control rod 215 which hinder the flow of liquid in the up-down direction, and have the same structural shape and positional relationship, that is, the resistance members of the two second flow holes 222 are of the same shape in the flow direction of the liquid, so the flow rates of the liquid flowing through the two second flow holes 222 are the same. In contrast, the upper part of one first flow hole 221 corresponds to the supporting column 213 which hinders the flow of liquid, while the upper part of the other first flow hole 221 does not correspond to a component which hinders the flow of liquid, so the flow rates of the liquid flowing through the two first flow holes 221 are different. In addition, the non-invasive flow field measurement method, such as the visualization sub-device 191 described above, cannot obtain accurate flow field information of the two first flow holes to be measured and the two second flow holes to be measured through the core upper plate model. Specifically, on the one hand, the guide cylinder 212, the control rod 215 and the supporting column 213 exist above the core upper plate 211, and the upper tube seat 214 exists below the core upper plate 211, thereby shielding the core upper plate 211 and affecting the image shooting of the area corresponding to the core upper plate 211 in the assembly model 111; on the other hand, the flow holes have curved surface structures which can refract light, thereby causing the particle image shot to be inconsistent with the actual situation and seriously distorted.

[0048] In view of the measurement requirements of the flow holes and the problems of the non-invasive flow field measurement method, in the embodiment, the flow rates of the two first flow holes to be measured and the two second flow holes to be measured are obtained through the two detection mechanisms 194 and the data processing device 20, so as to realize the collection of the flow field information of the first flow holes 221 and the second flow holes 222. It is continued to refer to Figure 7, the detection mechanism 194 includes a measuring module 195 and a moving module 196. The measuring module 195 includes the pitot tube 41, the connecting pipe 42 and the differential pressure transmitter 43. The pitot tube 41 has a first end 411 and a second end 412. The first end 411 is adapted to extend into the first to-be-measured flow hole 33 which needs to be measured. The second end 412 is connected to the differential pressure transmitter 43 through the connecting pipe 42. It should be noted that in the embodiment, the pitot tube 41 is an L-shaped pitot tube, the extension direction of the first end 411 is parallel to the a direction, and the first end 411 has two pressure tapping holes for obtaining the total pressure data and the static pressure data at the first end 411 when the liquid flows through. In addition, in the embodiment, the second end 412 is connected to the high pressure end and the low pressure end of the differential pressure transmitter 43 through the connecting pipe 42, and then the differential pressure transmitter 43 calculates the dynamic pressure data at the first end 411 according to the total pressure data received by the high pressure end and the static pressure data received by the low pressure end. Preferably, the ratio of the diameter of the pitot tube 41 to the diameter of the corresponding first to-be-measured flow hole 33 is not greater than 0.02, so that the pitot tube invading the first to-be-measured flow hole 33 does not interfere with the flow field of the first to-be-measured flow hole 33, and the collection accuracy of the flow field information of the first to-be-measured flow hole 33 is improved. In the embodiment, the diameter of the pitot tube 41 is 3 mm.

[0049] It should be noted that in the embodiment, the pitot tube 41 is pre-buried by slotting the component model 111, so that the first end 411 of the pitot tube 41 is located in the first to-be-measured flow hole 33 which needs to be measured, and then the slot is filled with a plug and the surface of the slot area is smoothed to reduce the influence on the flow field information of the first to-be-measured flow hole 33. In the embodiment, the two first to-be-measured flow holes 33 have corresponding detection mechanisms 194 respectively, so that the dynamic pressure data of the two first to-be-measured flow holes 33 can be measured at the same time. However, the number of detection mechanisms 194 is not limited by the application. For example, in other embodiments, the detection mechanism 194 can be taken out of the slot after the dynamic pressure data of one first to-be-measured flow hole 33 is measured, and then used on another first to-be-measured flow hole 33. However, it can be understood that when each first to-be-measured flow hole 33 corresponds to a pre-buried pitot tube 41 respectively, the damage caused by repeated invasion of the component model 111 can be avoided, the mapping accuracy of the component model 111 and the guide cylinder assembly 21 is improved, and then the mapping accuracy of the measured dynamic pressure data is improved.

[0050] Continuing to refer to Figure 6 and Figure 7 , the moving module 196 includes a sliding rail 51, a connecting seat 52 and a driving member 53. The sliding rail 51 is arranged on the outer wall of the component model 111 Figure 6The connecting seat 52 is slidingly connected with the slide rail 51 and fixedly connected with the pitot tube 41. In the embodiment, the connecting seat 52 is arranged on the iron block of the slide rail 51, and the connecting seat 52 has a groove extending along the b-b' direction, and the groove is used for placing the pitot tube 41. In addition, the connecting seat 52 further has a bolt hole penetrating through the side wall of the groove, and after the pitot tube 41 is placed in the groove, a bolt is screwed into the bolt hole and abuts against the pitot tube 41, so that the pitot tube 41 is stably connected with the connecting seat 52. In the embodiment, the driving member 53 includes a knob 531, and the driving member 53 is configured to drive the connecting seat 52 to move along the slide rail 51 through rotation of the knob 531. It should be noted that in other embodiments, the driving member 53 can drive the connecting seat 52 to move along the slide rail 51 through an electric control device. In the embodiment, the driving member 53 drives the iron block of the slide rail 51 to move, so as to drive the connecting seat 52 to move. In the embodiment, the slide rail 51 is a precision slide rail, and one rotation of the knob 531 drives the pitot tube 41 to move 2 mm along the b-b' direction. In the embodiment, a plurality of mark points are arranged on the slide rail 51, each mark point corresponds to a preset point, and a position mark is further arranged on the connecting seat 52.

[0051] The structure features of the detection mechanism 194 have been described above, and the process of acquiring dynamic pressure data of each preset point in the first to-be-detected flow hole 33 by the detection mechanism 194 will be further described below, so as to describe the mutual relationship of each structure feature of the detection mechanism 194. First, the user rotates the knob 531 to move the first end 411 of the pitot tube 41 along the b-b' direction to the preset points closest to the b direction and the b' direction respectively, and sets mark points corresponding to the two preset points on the slide rail 51. Then, the user equally divides the distance between the two mark points according to the total number of each preset point in the first to-be-detected flow hole 33, so as to obtain mark points corresponding to the remaining preset points. In the embodiment, the distance is equally divided into 20 parts, and the minimum accuracy of the knob 531 can make the position mark correspond to each mark point, so that the first end 411 is accurately located at the preset point. In addition, in the embodiment, the mark point corresponding to the preset point most protruding into the first to-be-detected flow hole 33 is marked as "-1", and the mark point corresponding to the preset point least protruding into the first to-be-detected flow hole 33 is marked as "1", and the remaining preset points are marked with corresponding numbers between 1 and -1 according to the equal division result, so as to effectively distinguish each mark point. Subsequently, when the liquid flows through the first to-be-detected flow hole 33, the user moves from the preset point of the pitot tube 41 most protruding into the first to-be-detected flow hole 33 as a starting point to the direction away from the retraction assembly model 111, and stops at each preset point in turn to acquire corresponding dynamic pressure data. For example, Figure 7The direction of the evacuation assembly model 111 corresponding to the first to-be-measured flow hole 33 in the lower left corner is the b direction. Preferably, each preset point of the same first to-be-measured flow hole 33 is uniformly distributed on the same line segment, and the line segment is the diameter of the circle corresponding to the first to-be-measured flow hole 33, so that more complete dynamic pressure data of the first to-be-measured flow hole 33 at different positions can be obtained to improve the accuracy of subsequent flow calculation.

[0052] Further combining Figure 2 After the data processing device 20 receives the plurality of dynamic pressure data of the first to-be-measured flow hole 33, the data processing device 20 calculates the measured flow data of the first to-be-measured flow hole 33 according to the plurality of dynamic pressure data of the first to-be-measured flow hole 33. Wherein, the data processing device 20 is configured to calculate the measured flow data Q of the first to-be-measured flow hole q according to the following formula:

[0053]

[0054] In the formula, ΔP is the dynamic pressure data of a preset point of the first to-be-measured flow hole q, ρ is the density of the liquid, K is the pitot tube correction coefficient, f(u) is the flow rate of the preset point, h is the dimensionless number of the moving distance after equal division and the radius, m is the total number of the preset points, f(u 2i ) is the flow rate of the 2i-th preset point, f(u m ) respectively corresponds to the preset point closest to the starting point and the ending point of the preset route, that is, the preset point corresponding to the mark point "-1" and "1" mentioned above, is the average flow rate of the first to-be-measured flow hole q, and A is the flow area of the first to-be-measured flow hole q. In this embodiment, the pitot tube correction coefficient is the product parameter of the pitot tube 41, and in other embodiments, the user can adjust the product parameter according to the actual measurement results to obtain more accurate flow rate values.

[0055] In this embodiment, each dynamic pressure data is converted into a flow rate, and then the average flow rate of the first to-be-measured flow hole 33 is calculated according to each flow rate corresponding to the first to-be-measured flow hole 33, and then the measured flow data of the first to-be-measured flow hole 33 is calculated in combination with the area of the first to-be-measured flow hole 33. It can be understood that this embodiment obtains the flow rate of each different position of the circular first to-be-measured flow hole 33 based on the densely collected dynamic pressure data, and then the accurate measured flow data can be obtained. Subsequently, the data processing device 20 performs proportional conversion according to the measured flow data to obtain the actual flow data of the first flow hole corresponding to the first to-be-measured flow hole. For example, Figure 5 When the ratio of the core upper plate 211 of the Figure 8 to the core upper plate model 35 of the is 4:1, the ratio of the actual flow data to the measured flow data is 16:1. Specifically, refer to the following formula.

[0056] Q = Au = πl 2 u,

[0057]

[0058] wherein u is the inlet flow rate, Q is the prototype flow rate, A is the prototype structure area, l is the prototype body inlet circular pipe diameter, Q ′ is the reduced model flow rate, A ′ is the reduced structure area, l ′ is the reduced structure inlet circular pipe diameter. Thus, when the ratio of the core upper plate 211 to the core upper plate model 35 is 4:1, i.e. , the corresponding i.e. the ratio of the actual flow rate data to the measured flow rate data is 16:1.

[0059] It should be noted that through repeated argumentation and testing, only the first to-be-measured flow hole 33 in a circular shape can obtain accurate measured flow rate data according to the dynamic pressure data collected in the above manner, i.e. other non-circular flow holes cannot obtain an effective amount of dynamic pressure data under the premise of avoiding affecting the flow field due to uneven distribution of dynamic pressure data at different positions, so as to be unable to calculate accurate flow field data of the non-circular flow hole by using the dynamic pressure data. In the embodiment, the second to-be-measured flow hole 34 corresponds to the second flow hole 222, so the two second to-be-measured flow holes 34 also have the same flow rate. In addition, the liquid flowing through the assembly model 111 must pass through the second to-be-measured flow hole 34 or the first to-be-measured flow hole 33. Therefore, the data processing device 20 is also adapted to calculate the measured flow rate data of each second to-be-measured flow hole 34 according to the total flow rate collected by the flowmeter 18 and the measured flow rate data of each first to-be-measured flow hole 33. Wherein the data processing device 20 is further configured to calculate the flow rate data Q b of the second to-be-measured flow hole according to the following formula:

[0060]

[0061] wherein Q s is the total measured flow rate data, Q a is the measured flow rate data of the athfirst to-be-measured flow hole, n is the total number of the second flow holes, i.e. the total number of the second to-be-measured flow holes in the core upper plate model, and k is the total number of the first flow holes, i.e. the total number of the first to-be-measured flow holes in the core upper plate model.

[0062] Subsequently, the data processing device 20 further proportionally converts the measured flow rate data of each second to-be-measured flow hole 34 to obtain the actual flow rate data of the second flow hole corresponding to the second to-be-measured flow hole. It can be understood that the proportional relationship between the measured flow rate data of the second to-be-measured flow hole 34 and the actual flow rate data of the corresponding second flow hole is the same as that of the first to-be-measured flow hole 33, which will not be repeated here.

[0063] Having briefly described the test system 100, another aspect of the present application refers to a test method 300 for measuring a flow field of a guide vane assembly, which can employ the test system of any embodiment of the present application. Referring to Figure 8 A test method 300 for measuring a flow field of a guide vane assembly is also proposed, which can employ the test system of any embodiment of the present application. Referring to Figure 1 、 Figure 2 and Figure 8 The process of the test method 300 for measuring a flow field of a guide vane assembly, which employs the test system 100, includes the following steps. Step S1 is to make the liquid flow through the measurement model 11 and make the assembly model 111 form an assembly model flow field corresponding to the guide vane assembly of the specified region. The flow rate of the assembly model flow field is a preset flow rate. Further referring to Figure 9Step S1 includes the following sub-steps. Step S11 is to open the first liquid outlet valve 13 and / or the second liquid outlet valve 15 according to the guide cylinder assembly 21 of the designated area. Step S12 is to open the pump post valve 9 and the bypass valve 10. Step S13 is to start the drive pump 4 to make the liquid in the circulating liquid tank 1 flow through the second connecting pipe 7 or the assembly model 111 and then reflow into the circulating liquid tank 1, wherein the gas in the liquid flowing through the second connecting pipe 7 and then flowing into the circulating liquid tank 1 is gradually exhausted from the liquid flowing into the assembly model 111. In the embodiment, the gas is air. Since the assembly model 111 is not filled with liquid in the initial state, it is filled with air. When the water flows through the assembly model 111, most of the air will be taken away, but part of the air will be mixed in the water and may flow into the assembly model 111 again, thereby affecting the image acquisition effect of the visualization sub-device 191. To this end, the first tee second end 82 of the embodiment extends in the direction opposite to the direction of gravity, so that the gas in the water flowing through the first tee 8 first flows into the second connecting pipe 7, thereby avoiding flowing into the assembly model 111 again. In addition, when the drive pump 4 is started in step S13, the frequency converter 5 controls the drive pump 4 to start at a low frequency and gradually increase the motor frequency of the drive pump 4, thereby reducing the pressure head of the drive pump 4 at the beginning, and then slowing down the flow rate of the water, so that the air in the water flows into the second connecting pipe 7 more fully. In the embodiment, when the motor frequency of the drive pump 4 reaches 16 Hz, the water circulating in the loop of the test system 100 no longer contains obvious air bubbles. Step S14 is to close the bypass valve 10 after determining that the liquid flowing into the assembly model 111 does not contain gas. Step S15 is to increase the rotation speed of the drive pump 4 so that the flow data measured by the flowmeter 18 is higher than the preset flow. Step S16 is to adjust the opening degree of the bypass valve 10 so that the flow data is equal to the preset flow. In the embodiment, the frequency converter 5 controls the rotation speed of the drive pump 4 has a precision limit and cannot be accurately adjusted to the preset flow, therefore, the opening degree of the bypass valve 10 is adjusted to make the flow data equal to the preset flow in combination with the rotation speed of the drive pump 4. On the other hand, the drive pump 4 has the best working performance in a fixed working frequency range, i.e., it can stabilize the flow, but the flow corresponding to the fixed working frequency cannot meet the demand of the preset flow, therefore, the second connecting pipe 7 can make the flow through the assembly model 111 meet the preset flow under the premise that the drive pump 4 is in the best working performance, thereby further stabilizing the flow in the circulating loop of the test system 100. In the embodiment, when the fluctuation of the flow data collected by the flowmeter 18 is between ±0.5 m3 / h, the flow in the circulating loop of the test system 100 is in a stable stage, and the data collection can be continued.

[0064] With reference to Figure 2 and Figure 8, step S2 is collecting a plurality of data information of a plurality of preset measurement regions in the component model 111 by the data collection device 19. In the embodiment, before the detection mechanism 194 in the data collection device 19 is used to measure the dynamic pressure data, the exhaust hole of the differential pressure transmitter 43 is first opened, the connecting pipe 42 and the gas in the differential pressure transmitter 43 are exhausted, and after the gas is exhausted, the left and right valves of the three valve group of the differential pressure transmitter 43 are closed and the middle valve of the three valve group is opened, and then the zero drift of the differential pressure transmitter 43 is recorded for subsequent calculation. In other embodiments, the zero drift of the differential pressure transmitter 43 can also be zeroed by an external hand-operated device. After recording the zero drift, the exhaust hole is opened again to ensure that the gas is exhausted, thereby completing the preparation work before the detection mechanism 194 measures. Step S3 is generating measurement flow field data according to a plurality of data information of each preset measurement region by the data processing device 20. In the embodiment, the measurement flow field data includes actual flow data corresponding to the first flow hole 221 and the second flow hole 222, and actual flow field data corresponding to each first preset measurement region. The measurement flow field data can be used to verify the modeling simulation data of the fluid mechanics analysis method, so as to confirm whether the modeling of the fluid mechanics analysis method is correct, and then further analyze the flow field and structural improvement mode of the guide cylinder assembly of the reactor by using the modeling. It should be noted that the application does not limit the application mode of the measurement flow field data.

[0065] It should be noted that the present embodiment is described with respect to the core upper plate 211 having two circular first flow holes 221 and two non-circular second flow holes 222, but the present application does not limit the number of the first flow holes 221 and the second flow holes 222. For example, in some embodiments, the core upper plate 211 can have one or more first flow holes 221 and any number of second flow holes 222, wherein the number of the second flow holes 222 can be 0, and the accurate real flow data of each flow hole can be obtained after the scheme according to the present embodiment is adapted. In addition, in the present embodiment, the detection mechanism 194 is arranged in the two second flow holes 222, which on one hand detects whether the flow rate order of magnitude of the second flow hole 222 is consistent with that of the first flow hole 221, thereby assisting in verifying whether the flow rate measured by the first flow hole 221 is correct; on the other hand, when calculating the flow, the flow rate of the second flow hole 222 measured by the second flow hole 222 is used to calculate the flow of the second flow hole 222, and the flow of the second flow hole 222 calculated by the data processing device 20 is compared and verified, when the flows of the second flow hole 222 calculated by the two methods are similar, the accuracy of the measurement result can be assisted to prove. It should be noted that the above has described the problem that the data of the non-circular second flow hole 222 cannot be directly collected to accurately calculate the flow, and therefore the detection mechanism 194 arranged in the second flow hole 222 is only used to assist in verifying and cannot replace the flow calculation method of the second flow hole 222 according to the present embodiment. In other embodiments of the present application, the detection mechanism 194 can not be arranged in the second flow hole 222, that is, no assistance verification is performed. In addition, in the present application Figure 8-9 Flowcharts have been used to illustrate the operations performed by the apparatus according to the embodiments of the present application. It should be understood that the foregoing or the following operations are not necessarily performed in sequence. Instead, various steps can be processed in reverse order or simultaneously. Meanwhile, other operations can be added to these processes, or one or more steps can be removed from these processes.

[0066] The above has described the basic concept, and it is obvious that the above application disclosure is only used as an example and does not constitute a limitation on the present application. Although it is not explicitly stated here, those skilled in the art can make various modifications, improvements and corrections to the present application. Such modifications, improvements and corrections are suggested in the present application, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of the present application.

[0067] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0068] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0069] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of scope in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0070] Although this application has been described with reference to specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate this application, and various equivalent changes or substitutions can be made without departing from the spirit of this application. Therefore, any changes or modifications to the above embodiments within the essential spirit of this application will fall within the scope of the claims of this application.

Claims

1. A test system for flow field measurements of a guide cylinder assembly, characterized by, The application relates to a test system suitable for simulating a flow field of a guide tube device through which a liquid flows in a reactor, wherein the guide tube device comprises a plurality of guide tube assemblies located at different positions in the reactor, each of the guide tube assemblies comprises a plurality of control rods, and the test system comprises: a measurement model, wherein the measurement model comprises an assembly model which is scaled down in proportion to the guide tube assemblies, the assembly model is provided with at least a first liquid outlet and a second liquid outlet at different heights, when the liquid flows through the assembly model and flows out from the first liquid outlet and the second liquid outlet, a plurality of assembly model flow fields are formed in the assembly model, and the plurality of assembly model flow fields correspond to the guide tube assemblies located at different regions of the reactor respectively; a data acquisition device suitable for acquiring a plurality of data information of a plurality of preset measurement regions in the assembly model; and a data processing device in communication connection with the data acquisition device, wherein the data processing device is suitable for generating measurement flow field data according to the plurality of data information of each of the preset measurement regions.

2. The test system for flow field measurements of a guide cylinder assembly of claim 1, wherein, The assembly model is suitable for forming a first assembly model flow field, a second assembly model flow field and a third assembly model flow field, wherein, when the liquid flows out from the first liquid outlet only, the assembly model is suitable for forming the first assembly model flow field, and the first assembly model flow field corresponds to the guide tube assemblies located at a central region of the reactor; when the liquid flows out from the second liquid outlet only, the assembly model is suitable for forming the second assembly model flow field, and the second assembly model flow field corresponds to the guide tube assemblies located at an edge region of the reactor; when the liquid flows out from the first liquid outlet and the second liquid outlet simultaneously, the assembly model is suitable for forming the third assembly model flow field, and the third assembly model flow field corresponds to the guide tube assemblies located between the edge region and the central region.

3. The test system for flow field measurements of a guide cylinder assembly of claim 1, wherein, The measurement model is further provided with a liquid inlet at a bottom end of the assembly model, and the test system further comprises: a circulating liquid tank for storing the liquid; a driving pump connected between the circulating liquid tank and the assembly model, wherein the driving pump is suitable for driving the liquid to flow out from an outlet of the circulating liquid tank and to flow into the liquid inlet, so that the liquid flows through the assembly model from bottom to top.

4. The test system for flow field measurements of a guide cylinder assembly of claim 3, wherein, The test system further comprises: a first connecting pipe, one end of the first connecting pipe is connected with an outlet of the driving pump, and the other end of the first connecting pipe is connected with the liquid inlet; a second connecting pipe, one end of the second connecting pipe is connected with the first connecting pipe, and the other end of the second connecting pipe is connected with the circulating liquid tank, wherein the second connecting pipe is suitable for guiding at least part of the liquid flowing through the first connecting pipe into the circulating liquid tank; a bypass valve arranged on the second connecting pipe, wherein the bypass valve is suitable for controlling the second connecting pipe to be open or closed.

5. The test system for flow field measurements of a guide cylinder assembly of claim 4, wherein, The test system further comprises: a post-pump valve arranged on the first connecting pipe and located between the outlet of the driving pump and one end of the second connecting pipe, wherein the post-pump valve is suitable for controlling the first connecting pipe to be open or closed.

6. The test system for flow field measurements of a guide cylinder assembly of claim 3, wherein, The test system further comprises: a third connecting pipe, one end of the third connecting pipe being connected with the first liquid outlet, the third connecting pipe being adapted to guide the liquid flowing out of the first liquid outlet into the circulating liquid tank; a first liquid outlet valve arranged on the third connecting pipe, the first liquid outlet valve being adapted to control the third connecting pipe to be open or closed; a fourth connecting pipe, one end of the fourth connecting pipe being connected with the second liquid outlet, the fourth connecting pipe being adapted to guide the liquid flowing out of the second liquid outlet into the circulating liquid tank; a second liquid outlet valve arranged on the fourth connecting pipe, the second liquid outlet valve being adapted to control the fourth connecting pipe to be open or closed.

7. The test system for flow field measurements of a guide cylinder assembly of claim 6, wherein, The test system further comprises: a fifth connecting pipe, one end of the fifth connecting pipe being connected with the other end of the third connecting pipe and the other end of the fourth connecting pipe respectively, the other end of the fifth connecting pipe extending into the circulating liquid tank, the fifth connecting pipe being adapted to guide the liquid flowing out of the first liquid outlet and / or the second liquid outlet into the circulating liquid tank again; a flow meter arranged on the fifth connecting pipe, the flow meter being adapted to measure flow data of the liquid flowing through the fifth connecting pipe.

8. The test system for flow field measurements of a guide cylinder assembly of claim 1, wherein, The plurality of preset measurement regions comprises a plurality of first preset measurement regions, the first preset measurement regions comprising components of transparent material, the liquid flowing through the measurement model comprising tracer particles, the data information corresponding to the first preset measurement regions comprising flow field images, the data acquisition device comprising a visualization acquisition sub-device, the visualization acquisition sub-device comprising: a laser adapted to emit laser light to irradiate the first preset measurement regions; and a camera adapted to acquire a plurality of flow field images corresponding to the first preset measurement regions when the liquid flows through the first preset measurement regions irradiated by the laser light, the flow field images comprising the tracer particles displayed by the laser light; the data processing device being adapted to generate actual flow field data corresponding to each of the first preset measurement regions according to the plurality of flow field images, the measurement flow field data comprising the actual flow field data.

9. The test system for flow field measurements of a guide cylinder assembly of claim 1, wherein, The guide cylinder assembly comprises a core upper plate, the core upper plate comprising a water flow hole, the water flow hole comprising at least one first water flow hole, the first water flow hole being circular, the assembly model comprising a core upper plate model proportionally reduced from the core upper plate, the core upper plate model being provided with a first to-be-measured water flow hole, the first to-be-measured water flow hole being proportionally reduced from the first water flow hole; the preset measurement region comprising a second preset measurement region, the second preset measurement region comprising the first to-be-measured water flow hole, the data information corresponding to the first to-be-measured water flow hole comprising dynamic pressure data; The data acquisition device comprises at least one detection mechanism, the detection mechanism comprising a measuring module, the measuring module comprising a probe end, the probe end being adapted to extend into the first flow hole to be measured and move along a preset route, so that the measuring module generates a plurality of dynamic pressure data of a plurality of preset points on the preset route in the first flow hole to be measured. The data processing device is adapted to calculate the measured flow data of the first flow hole to be measured according to the plurality of dynamic pressure data of the first flow hole to be measured, and to perform proportional conversion according to the measured flow data to obtain the actual flow data of the first flow hole corresponding to the first flow hole to be measured, the measured flow field data comprising the actual flow data.

10. The test system for flow field measurements of a guide cylinder assembly of claim 9, wherein, The measuring module further comprises a pitot tube and a differential pressure transmitter, wherein: The pitot tube has a first end and a second end, the first end being the probe end; The differential pressure transmitter is connected to the second end of the pitot tube, and the differential pressure transmitter is adapted to generate the dynamic pressure data of the preset point when the liquid flows through the first flow hole to be measured and the first end is located at the preset point.

11. The test system for flow field measurements of a guide cylinder assembly of claim 10, wherein, The ratio of the aperture of the pitot tube to the aperture of the corresponding first flow hole to be measured is not greater than 0.

02.

12. A test system for flow field measurements of a guide tube assembly according to any one of claims 9 to 11, characterized in that The data processing device is further configured to calculate the measured flow data Q of the first flow hole to be measured q according to the following formula: wherein ΔP is the dynamic pressure data of a preset point of the first flow hole q to be measured, ρ is the density of the liquid, K is the pitot tube correction coefficient, f(u) is the flow rate of the preset point, h is the dimensionless number of the moving distance after equal division and the radius, m is the total number of the preset points, f(u 2i ) is the flow rate of the second i preset point, f(u m ) respectively corresponds to the preset point closest to the starting point and the ending point of the preset route, is the average flow rate of the first flow hole q to be measured, and A is the flow area of the first flow hole q to be measured.

13. A test method for flow field measurement of a guide cylinder assembly, characterized by, The test system for measuring the flow field of a guide tube assembly is adapted to obtain the measured flow field data of the guide tube assembly corresponding to a specified area of the reactor according to any one of claims 1-12, comprising: making the liquid flow through the measurement model and making the component model form the component model flow field corresponding to the guide tube assembly of the specified area; collecting, by the data acquisition device, the plurality of data information of the plurality of preset measurement regions in the component model; generating, by the data processing device, the measured flow field data according to the plurality of data information of each of the plurality of preset measurement regions.

14. The test method for flow field measurements of a guide cylinder assembly of claim 13, wherein, The test system further comprises a circulating liquid tank, a driving pump, a first connecting pipe, a second connecting pipe, a bypass valve, a post-pump valve, a third connecting pipe, a first liquid outlet valve, a fourth connecting pipe, a second liquid outlet valve, a fifth connecting pipe and a flowmeter, the flow rate of the component model flow field being a preset flow rate, and the step of making the liquid flow through the measurement model and making the component model form the component model flow field corresponding to the guide tube assembly of the specified area further comprises: opening the first liquid outlet valve and / or the second liquid outlet valve according to the guide tube assembly of the specified area; opening the post-pump valve and the bypass valve; opening the driving pump to make the liquid in the circulating liquid tank flow through the second connecting pipe or the component model and then reflow into the circulating liquid tank, wherein the liquid flowing through the second connecting pipe and then flowing into the circulating liquid tank is used to gradually exhaust the gas mixed in the liquid flowing into the component model; after determining that the liquid flowing into the component model is not mixed with the gas, closing the bypass valve; increasing the rotation speed of the driving pump to make the flow data measured by the flow meter higher than the preset flow; adjusting the opening degree of the bypass valve to make the flow data equal to the preset flow.

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