An experimental device for reactor thermal-hydraulics

Abstract

The application discloses a reactor thermal-hydraulic experiment device, both ends of an outer cylinder are communicated with an inlet assembly and an outlet assembly, a bottom plate and a top plate are sequentially and spacedly arranged from the inlet assembly to the outlet assembly and are connected with the outer cylinder, so as to cut the inner cavity of the outer cylinder into a first chamber, a second chamber and a third chamber in sequence, both ends of a partition plate are connected with the bottom plate and the top plate and the second chamber is cut into a left chamber and a right chamber which are isolated from each other, a flow distribution assembly is arranged in the first chamber and is used for providing a uniform inlet flow field, the inlet assembly is communicated with the first chamber, the outlet assembly is communicated with the third chamber, the first chamber and the third chamber are simultaneously communicated with the right chamber, an inner component experiment body is arranged in the right chamber, and pressure measuring assemblies are respectively arranged on the side walls of the first chamber, the right chamber and the third chamber. The experiment device restores the internal flow channel of the reactor metal reflection layer assembly prototype as much as possible, and the flow distribution assembly realizes the inlet condition construction of the uniform pressure field distribution in front of the bottom plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of reactor thermal-hydraulic experimental research, and particularly relates to an experimental device for reactor thermal-hydraulics. BACKGROUND

[0002] In the operation of a reactor, not all of the incoming coolant is used to cool the fuel assemblies, and a portion of the coolant flows out through the gaps between other structures without passing through the fuel assemblies in the core. The proportion of the main flow and the bypass flow directly affects the heat removal of the reactor and even the reactivity. Among these proportions, the proportion of the coolant passing through the metal reflector structure is referred to as the metal reflector bypass flow proportion. In order to control the metal reflector bypass flow proportion, it is an important content of reactor thermal-hydraulic experimental research to obtain the resistance data of the metal reflector structure through experiments to match the core resistance.

[0003] However, due to the large size and complex structure of the reactor prototype, for the metal reflector bypass flow, the separation effect is generally selected for attention, that is, the metal reflector structure of interest is extracted for thermal-hydraulic experimental design. The experimental devices currently used for this experiment are all simplified, and the structure is very simple. Some experimental devices only design a bottom plate and a top plate, the inside is designed as a cavity structure, and the length of the bypass flow chamber is shortened, and the internal components of the bypass flow chamber between the two are not considered. Some experimental devices do not design a core flow channel, and the fluid entering the experimental body only passes through the containment assembly, which is quite different from the actual core flow channel.

[0004] In summary, in order to reduce the experimental difficulty and experimental cost, the existing experimental design generally ignores the construction of the inlet flow field condition or simplifies the metal reflector structure, resulting in a large gap between the final experimental data and the actual situation. SUMMARY

[0005] The technical problem to be solved by the present application is to provide an experimental device for reactor thermal-hydraulics.

[0006] The technical scheme adopted by the present application to solve the technical problem is: an experimental device for reactor thermal-hydraulics, comprising an outer cylinder, an inlet assembly, an outlet assembly, a flow dividing assembly, a bottom plate, a partition plate, a top plate, an internal component experimental body and a pressure measuring assembly, both ends of the outer cylinder are in communication with the inlet assembly and the outlet assembly, the bottom plate and the top plate are sequentially and spaced apart from the inlet assembly to the outlet assembly and are connected with the outer cylinder to cut the inner cavity of the outer cylinder into a first chamber, a second chamber and a third chamber in sequence; both ends of the partition plate are connected with the bottom plate and the top plate, and the second chamber is cut into a left chamber and a right chamber which are isolated from each other; the flow dividing assembly is arranged in the first chamber for providing a uniform inlet flow field.

[0007] The inlet assembly is in communication with the first chamber, the outlet assembly is in communication with the third chamber, the first chamber and the third chamber are in communication with the right chamber at the same time, and the first chamber, the left chamber and the third chamber are isolated in turn.

[0008] The inner member experimental body is arranged in the right chamber, and the pressure measuring assembly penetrates the side walls of the first chamber, the right chamber and the third chamber respectively.

[0009] In some embodiments, the shunt assembly comprises a plurality of shunt plates arranged at intervals, and each shunt plate is provided with a plurality of uniform shunt holes.

[0010] In some embodiments, the experimental device further comprises a flow hole experimental block provided with flow holes, and the flow hole experimental block is detachably connected with the bottom plate to meet the experimental needs of studying the bypass resistance under different flow holes.

[0011] In some embodiments, the experimental device further comprises a cover plate arranged in the first chamber and opposite to the flow hole experimental block, and a gap is left between the cover plate and the flow hole experimental block.

[0012] In some embodiments, the outer cylinder comprises a front plate, a side plate, a rear plate and a detachable panel, the side plate is connected with the front plate and the rear plate respectively, the front plate is provided with a window, and the detachable panel can be detachably covered on the window.

[0013] In some embodiments, the outer cylinder further comprises a bottom flange.

[0014] The inlet assembly comprises the same inlet flange and the gradually expanded inlet pipe section, and the bottom flange is connected with the inlet flange.

[0015] In some embodiments, the outer cylinder further comprises a top flange.

[0016] The outlet assembly comprises the same outlet flange and the gradually reduced outlet pipe section, and the top flange is connected with the outlet flange.

[0017] In some embodiments, the pressure measuring assembly comprises at least four transverse pressure measuring groups and a plurality of longitudinal pressure measuring groups, two of the transverse pressure measuring groups are arranged on the two sides of the bottom plate respectively and have the same spacing with the bottom plate, two of the transverse pressure measuring groups are arranged on the two sides of the top plate respectively and have the same spacing with the top plate, and the longitudinal pressure measuring groups are arranged between the bottom plate and the top plate.

[0018] In some embodiments, the front plate and the rear plate are 1 / 8 arc-shaped plates, and the front plate and the rear plate are concave relative to each other.

[0019] In some embodiments, the experimental apparatus for reactor thermal hydraulics further includes at least two lifting lugs and four supports, wherein at least two of the lifting lugs are symmetrically connected to the outside of the outer cylinder, and the four supports are symmetrically connected to the outside of the outer cylinder; the at least two lifting lugs and the four supports are distributed at intervals along the axial direction of the outer cylinder.

[0020] By implementing this invention, the following beneficial effects are achieved:

[0021] The experimental apparatus for reactor thermal hydraulics of the present invention includes an outer cylinder, an inlet assembly, an outlet assembly, a flow divider assembly, a bottom plate, a baffle plate, a top plate, an internal component experimental body, and a pressure measuring assembly. The two ends of the outer cylinder are respectively connected to the inlet assembly and the outlet assembly. The bottom plate and the top plate are sequentially spaced from the inlet assembly to the outlet assembly and connected to the outer cylinder, thereby dividing the inner cavity of the outer cylinder into sequentially adjacent first, second, and third chambers. The two ends of the baffle plate are respectively connected to the bottom plate and the top plate, and... The second chamber is divided into a left chamber and a right chamber that are isolated from each other. The flow splitting assembly is located in the first chamber to provide a uniform inlet flow field. The inlet assembly is connected to the first chamber, and the outlet assembly is connected to the third chamber. The first chamber and the third chamber are simultaneously connected to the right chamber, and the first chamber, the left chamber, and the third chamber are sequentially isolated. The internal component experimental body is located in the right chamber, and the pressure measuring assembly is respectively installed through the side walls of the first chamber, the right chamber, and the third chamber. This experimental device, through the outer cylinder, inlet assembly, outlet assembly, flow splitting assembly, bottom plate, partition plate, top plate, and internal component experimental body, replicates the internal flow channel of the prototype reactor metal reflector assembly as closely as possible. The flow splitting assembly creates an inlet condition with a uniform pressure field distribution in front of the bottom plate, so that the pressure measuring assembly can test experimental data at various locations that are closer to the actual situation of the prototype reactor metal reflector assembly. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the experimental apparatus for reactor thermal hydraulics according to an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 A perspective view of the experimental setup in the image;

[0025] Figure 3 yes Figure 1 A front view of the experimental setup in the image;

[0026] Figure 4 yes Figure 3A cross-sectional view of the experimental setup in the image;

[0027] Figure 5 yes Figure 3 BB cross-sectional view of the experimental setup in the image;

[0028] Figure 6 yes Figure 3 CC cross-sectional view of the experimental setup in the image;

[0029] Figure 7 yes Figure 3 DD cross-sectional view of the experimental setup in the image;

[0030] Figure 8 yes Figure 1 A three-dimensional schematic diagram of part of the experimental setup in the image;

[0031] Figure 9 yes Figure 8 A cross-sectional view of the base plate, the water flow hole experimental block, and the cover plate. Detailed Implementation

[0032] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0033] In the description of the invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a chemical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] See Figures 1 to 9 An embodiment of the present invention discloses an experimental apparatus for reactor thermal-hydraulics, used to study the hydraulic characteristics of a metal reflector layer. The experimental apparatus includes an outer cylinder 1, an inlet assembly 2, an outlet assembly 3, a flow divider assembly 4, a bottom plate 5, a baffle plate 6, a top plate 7, an internal component experimental body 8, and a pressure measuring assembly. The two ends of the outer cylinder 1 are connected to the inlet assembly 2 and the outlet assembly 3, respectively. The bottom plate 5 and the top plate 7 are sequentially spaced from the inlet assembly 2 to the outlet assembly 3 and connected to the outer cylinder 1, thereby dividing the inner cavity of the outer cylinder 1 into sequentially adjacent first chamber 11, second chamber 12, and third chamber 13. The outer cylinder 1 is used to simulate the reactor core's confinement, and can be one-eighth the size of the reactor core's confinement structure. The two ends of the baffle plate 6 are connected to the bottom plate 5 and the top plate 7, respectively, and divide the second chamber 12 into mutually isolated left chamber 121 and right chamber 122. The baffle plate 6 is used to simulate the flow channel boundary of the reactor core's confinement, and is one of the important flow channels constituting the bypass flow of the metal reflector layer. The flow divider assembly 4 is disposed within the first chamber 11 to provide a uniform inlet flow field. The flow divider assembly 4 is used to simulate the inlet conditions of a uniform pressure field before the flow holes 91 in the lower core plate. Preferably, the flow divider assembly 4 is detachably installed within the first chamber 11 for easy replacement.

[0036] Inlet component 2 is connected to the first chamber 11, and outlet component 3 is connected to the third chamber 13. Both the first chamber 11 and the third chamber 13 are simultaneously connected to the right chamber 122. The first chamber 11, left chamber 121, and third chamber 13 are sequentially isolated. The bottom plate 5 between the first chamber 11 and the right chamber 122 has a threaded hole 51, and the top plate 7 between the third chamber 13 and the right chamber 122 has a top partition 72. Figure 4 As shown. Figure 5 As shown, the internal component experimental body 8 is located in the right chamber 122. Pressure measuring components are respectively installed through the side walls of the first chamber 11, the right chamber 122, and the third chamber 13, meaning that the pressure measuring components are partially exposed outside the outer cylinder 1. The pressure measuring components are connected to the interiors of the first chamber 11, the right chamber 122, and the third chamber 13. For example, stepped holes are provided on the side walls of the first chamber 11, the right chamber 122, and the third chamber 13, and the pressure measuring components communicate with each chamber through these stepped holes. Preferably, the internal component experimental body 8 is a metal reflective layer simulator, specifically a metal reflective layer simulator 1 / 8 the size of the prototype reactor metal reflective layer. The internal component experimental body 8 is detachably installed in the right chamber 122, facilitating the replacement of different internal component experimental bodies 8 to complete hydraulic characteristic verification experiments of different metal reflective layer internal components.

[0037] During the experiment, the fluid is forced to flow out from the circulating pump, transported to the bottom of the experimental device through the pipeline, and enters the experimental device from the bottom to the top through the inlet assembly 2. After the fluid is input from the inlet assembly 2, it enters the first chamber 11, is redistributed by the shunt assembly 4 in the first chamber 11, and is constructed into a uniform pressure field distribution inlet condition in front of the bottom plate 5. The shunted fluid enters the right chamber 122 from the first chamber 11 through the threaded hole 51 (in other embodiments, the shunted fluid passes through the water flow hole 91 of the water flow hole experimental block 9, see the following description) provided on the bottom plate 5, passes through the inner component experimental body 8 in the right chamber 122, enters the third chamber 13 through the top partition plate 72 provided on the top plate 7, and finally flows out from the outlet assembly 3, back to the pipeline circuit, that is, the proportion of the metal reflecting layer side flow can be simulated. At the same time, the pressure in the first chamber 11, the right chamber 122 and the third chamber 13 can be measured in real time by the pressure measuring assembly provided on the side wall, and the simulation resistance data of the metal reflecting layer structure can be obtained to match the core resistance.

[0038] In some embodiments, as shown in Figure 6 and Figure 8 The shunt assembly 4 includes a plurality of shunt plates 41 arranged at intervals, and each shunt plate 41 is provided with a plurality of uniform shunt holes 42. For example, the number of shunt plates 41 is one, two, three, etc., which is not limited in the present application. When the number of shunt plates 41 is two or more, the two or more shunt plates 41 are arranged in parallel and spaced apart. Preferably, in this embodiment, the shunt assembly 4 includes two shunt plates 41, and the inlet coolant reaches the bottom plate 5 after being distributed by the plurality of uniform shunt holes 42 on the two shunt plates 41. For easy replacement, the shunt plate 41 is detachably connected to the outer cylinder 1.

[0039] In some embodiments, as shown in Figure 8 and Figure 9As shown, the experimental device further comprises a flow hole experimental block 9 provided with a flow hole 91, and the flow hole experimental block 9 is detachably connected with the bottom plate 5 to meet the experimental needs of studying the bypass flow resistance under different flow holes 91. The flow hole experimental block 9 is used to simulate the flow hole of the core bottom plate. The outer thread size of the flow hole experimental block 9 is the same as the size of the reserved thread hole 51 of the bottom plate 5, the outer diameter of different flow hole experimental blocks 9 is the same, and the hole diameter of the internal flow hole 91 is different to correspond to different core bottom plate flow holes. In order to meet the experimental needs of different new type metal reflector internal components in one experimental device, the flow hole experimental block 9 is detachably connected with the bottom plate 5, for example, the thread hole 51 of the bottom plate 5 is provided with an internal thread, the flow hole experimental block 9 is provided with an external thread, the flow hole experimental block 9 is screwed into the thread hole 51 of the bottom plate 5, and the flow hole experimental block 9 is installed and fixed. When it is necessary to replace the flow hole experimental block 9, the current flow hole experimental block 9 is unscrewed, and the flow hole experimental block 9 required is replaced according to the above operation to meet the experimental needs of studying the bypass flow resistance under different flow holes 91. It can be understood that the experimental device provided with the flow hole experimental block 9, the fluid after being divided flows into the right chamber 122 through the flow hole 91, and the thread hole 51 of the bottom plate 5 plays a role in fixing the flow hole experimental block 9.

[0040] In some embodiments, as shown in Figure 7 and Figure 9 As shown, the experimental device further comprises a cover plate 10 arranged in the first chamber 11 and opposite to the flow hole experimental block 9, and a gap is left between the cover plate 10 and the flow hole experimental block 9. The cover plate 10 is detachably connected with the bottom plate 5, for example, the cover plate 10 is fixed on the bottom plate 5 by screws, not shown in the figure, to restore the inlet boundary of the flow hole 91 of the core.

[0041] Further, the cover plate 10 comprises a covering part 101 and an abutting part 102, and the abutting part 102 is protrusively arranged on the covering part 101. The abutting part 102 abuts against the bottom plate 5 and / or the flow hole experimental block 9 to form a sealed side. In order to achieve sealing, a sealing gasket 103 is arranged between the abutting part 102 and the bottom plate 5 or the flow hole experimental block 9, or a sealing gasket 103 is arranged between the covering part 101 and the bottom plate 5 or the flow hole experimental block 9, for example, a silica gel sealing gasket 103. The covering part 101 is detachably connected with the bottom plate 5 by screws, and a gap is left between the covering part 101 and the bottom plate 5 to form an open side. The covering part 101 is arranged opposite to the flow hole experimental block 9, and the fluid flows into the flow hole 91 of the flow hole experimental block 9 from the open side of the cover plate 10 after flowing into the open side of the cover plate 10 from the cross section of the covering part 101, thereby avoiding the fluid flowing directly into the flow hole 91 of the flow hole experimental block 9. Preferably, the cover plate 10 is a semicircular cover plate 10, the covering part 101 is a semicircular structure, and the connecting part is a semicircular structure.

[0042] In some embodiments, as shown in Figures 4 to 7As shown, the outer cylinder 1 includes a front plate 14, a side plate 15, a rear plate 16 and a detachable panel 17, the side plate 15 is connected to the front plate 14 and the rear plate 16 respectively, for example, welded fixed. The front plate 14 is provided with a window, and the detachable panel 17 can be detachably covered on the window. After the detachable panel 17 and the inlet flange 21 are removed, the internal structure such as the inner component experiment body 8, the water flow hole experiment block 9, the flow distribution assembly 4 and the pressure measuring assembly can be replaced. Among them, the outer cylinder 1 selects one-eighth structure of the prototype of the reactor core containment vessel to reduce 1:1, the front plate 14 and the rear plate 16 are 1 / 8 arc-shaped plates respectively, and the front plate 14 and the rear plate 16 are relatively concave. The front plate 14 is designed as an arc-shaped plate to completely restore the shape of the containment vessel, and the rear plate 16 is designed as an arc-shaped plate mainly considering the strength, which can avoid stress concentration. The side plate 15 includes two identical sizes, which are connected to the two sides of the front plate 14 and the rear plate 16 respectively. The detachable panel 17 extends along the axial direction of the outer cylinder 1, and the axial length is less than or equal to the axial length of the front plate 14, and the radial width is less than the radial width of the front plate 14, for example, the length of the detachable panel 17 is the distance from the flow distribution plate 41 assembly to the top plate 7. It can be understood that in other embodiments, the reactor core metal reflector prototype can be scaled according to the proportional modeling theory, for example, 1:5, to design the experimental device, that is, the outer cylinder 1 selects one-eighth structure of the prototype of the reactor core containment vessel to reduce 1:5.

[0043] Further, as shown in Figure 1 and Figure 2 In order to strengthen the strength of the outer cylinder structure formed by the front plate 14, the side plate 15, the rear plate 16 and the detachable panel 17, the experimental device further includes a plurality of hoops 40, which are arranged around the outer periphery of the outer cylinder 1, for example, one group, two groups, three groups, etc. When two or more groups of hoops 40 are arranged, the two or more groups of hoops 40 are arranged in the radial direction of the outer cylinder 1. When the detachable panel 17 needs to be removed, the hoops 40 are removed first.

[0044] In some embodiments, as shown in Figures 1 to 3 The outer cylinder 1 further includes a bottom flange 18. The bottom flange 18 is welded and fixed with the front plate 14, the side plate 15 and the rear plate 16 respectively. Among them, the bottom flange 18 is of an elliptical type. The inlet assembly 2 includes the same inlet flange 21 and the gradually expanding inlet pipe section 22, and the bottom flange 18 is connected with the inlet flange 21. Preferably, a sealing ring is arranged between the bottom flange 18 and the inlet flange 21 to realize sealed connection. The inlet pipe section 22 is of a conical structure.

[0045] In some embodiments, as shown in Figures 1 to 3As shown, the outer cylinder 1 further comprises a top flange 19. The top flange 19 is welded and fixed with the front plate 14, the side plate 15 and the back plate 16 respectively. Among them, the top flange 19 is of an oval type. The outlet assembly 3 comprises the same outlet flange 31 and the tapered outlet pipe segment 32, and the top flange 19 is connected with the outlet flange 31. Preferably, a sealing ring is arranged between the top flange 19 and the outlet flange 31 to realize a sealing connection. The outlet pipe segment 32 is of a conical structure.

[0046] The bottom flange 18, the front plate 14, the side plate 15, the back plate 16 and the top flange 19 are respectively correspondingly sealingly connected and fixed to jointly enclose the outer cylinder 1 with an inner cavity.

[0047] In some embodiments, as shown, Figure 1 the installation points of the pressure measuring assembly are shown. The pressure measuring assembly comprises at least four transverse pressure measuring groups and a plurality of longitudinal pressure measuring groups. Two transverse pressure measuring groups are respectively arranged on both sides of the bottom plate 5 and have the same spacing with the bottom plate 5, for measuring the pressure on both sides of the bottom plate 5 to obtain the pressure difference of the bottom plate 5. Two transverse pressure measuring groups are respectively arranged on both sides of the top plate 7 and have the same spacing with the top plate 7, for measuring the pressure on both sides of the top plate 7 to obtain the pressure difference of the top plate 7. The longitudinal pressure measuring groups are arranged between the bottom plate 5 and the top plate 7, and specifically inside the right chamber 122, for measuring the pressure at the corresponding position in the right chamber 122 to finally obtain the pressure difference at the corresponding position. Among them, as shown, Figure 3 the longitudinal pressure measuring group comprises a plurality of pressure gauges 50, and the plurality of pressure gauges 50 are arranged in an axial direction of the right chamber 122. Each transverse pressure measuring group can comprise two or more pressure gauges 50, and the two or more pressure gauges 50 are arranged in a radial direction of the outer cylinder 1, for example, three pressure gauges 50 are arranged at 10 cm on the lower side of the bottom plate 5, and three pressure gauges 50 are arranged at the corresponding position on the upper side of the bottom plate 5, and the line connecting each pressure gauge 50 on the lower side and one of the pressure gauges 50 on the upper side is parallel to the axial direction of the outer cylinder 1. Preferably, the side walls of the first chamber 11, the right chamber 122 and the third chamber 13 are respectively provided with stepped holes, that is, the stepped holes are arranged on one of the front plate 14, the side plate 15 and the back plate 16, two of them or all of them, and the specific arrangement on the front plate 14, the side plate 15 or the back plate 16 can be set as needed, and each pressure gauge 50 is sealingly and fixedly installed through the stepped hole.

[0048] As can be understood, as shown, Figure 2 and Figure 4 in order to simulate the outlet flow channel of the top plate 7 in the prototype, the experimental device further comprises a top partition plate 72, which is arranged in the third chamber 13 and is fixedly connected with the top plate 7 and the two side plates 15, and the height of the top partition plate 72 in the axial direction of the outer cylinder 1 is less than the height of the third chamber 13 in the axial direction of the outer cylinder 1. The top partition plate 72 has the same shape as the partition plate 6, and the axis of the top partition plate 72 and the partition plate 6 in the axial direction of the outer cylinder 1 coincides.

[0049] In some embodiments, as shown in Figures 1 to 3 The experimental device for reactor thermal-hydraulics also comprises at least two lifting lugs 20 and four supports 30, for example, the number of lifting lugs 20 is two, three, four, etc. The at least two lifting lugs 20 are symmetrically connected to the outer side of the outer cylinder 1, and the four supports 30 are symmetrically connected to the outer side of the outer cylinder 1. The at least two lifting lugs 20 and the four supports 30 are distributed along the axial direction of the outer cylinder 1. The supports 30 play a supporting and fixing role when the experimental device is installed, and the lifting lugs 20 are used for lifting the experimental device.

[0050] The present application mainly solves the following three problems:

[0051] 1. The present application solves the problem of special-shaped structure design of the 1 / 8 metal reflector simulation body, and provides valuable reference for the design of double-arc-shaped special-shaped pressure containers. The outer cylinder 1 of the experimental device is formed by welding two 1 / 8 arc-shaped plates with different radii and two side plates 15 with the same size, and is surrounded by 4 groups of hoops 40 to strengthen the strength of the body. Elliptical mating flanges are welded at both ends, and the internal flow channel restores the geometric characteristics of the basket and the surrounding cylinder.

[0052] 2. The present application solves the problem of experimental verification of different new metal reflector internal components. The water flow hole experimental block 9, the cover plate 10 and the internal component experimental body 8 of the present application are all detachable structures. The present application can verify the hydraulic characteristics of two different metal reflector structures, and adapt to the whole cycle experimental needs of the development of metal reflector structure.

[0053] 3. The present application solves the problem of inlet condition construction of the uniform pressure field in front of the flow hole 91 of the core lower plate. The inlet assembly 2 and the shunt assembly 4 double or multi-layer shunt plate 41 are designed in the first chamber 11 in front of the bottom flow hole experimental block 9. The calculation and experimental results show that a uniform pressure field distribution is formed in front of the flow hole 91.

[0054] By implementing the present application, the following beneficial effects are achieved:

[0055] The experimental device for reactor thermal-hydraulics of the present application restores the internal flow channel of the reactor metal reflector assembly prototype as much as possible through the outer cylinder 1, the inlet assembly 2, the outlet assembly 3, the shunt assembly 4, the bottom plate 5, the partition plate 6, the top plate 7 and the internal component experimental body 8, and the shunt assembly 4 realizes the inlet condition construction of the uniform pressure field distribution in front of the bottom plate 5, so as to facilitate the pressure measuring assembly to test the test data closer to the real situation of the reactor metal reflector assembly prototype at each position.

[0056] It can be understood that the above embodiments only express the preferred embodiments of the present application, which are described in a more specific and detailed manner, but cannot be understood as a limitation to the patent scope of the present application; it should be pointed out that for ordinary skilled in the art, the above embodiments or technical features can be freely combined without departing from the concept of the present application, and several modifications and improvements can be made, which all belong to the protection scope of the present application, i.e. the embodiments described in "in some embodiments" can be freely combined with any of the above and below embodiments; therefore, any equivalent transformation and modification made to the patent claim scope of the present application shall belong to the coverage of the patent claim of the present application.

Claims

1. An experimental apparatus for reactor thermal-hydraulics, characterized in that, The experimental device comprises an outer cylinder (1), an inlet assembly (2), an outlet assembly (3), a flow distribution assembly (4), a bottom plate (5), a partition plate (6), a top plate (7), an inner member experimental body (8) and a pressure measuring assembly, the two ends of the outer cylinder (1) are communicated with the inlet assembly (2) and the outlet assembly (3) respectively, the bottom plate (5) and the top plate (7) are sequentially and spacedly arranged from the inlet assembly (2) to the outlet assembly (3) and connected with the outer cylinder (1), so as to cut the inner cavity of the outer cylinder (1) into a first chamber (11), a second chamber (12) and a third chamber (13) which are sequentially adjacent, the two ends of the partition plate (6) are connected with the bottom plate (5) and the top plate (7) respectively, and the second chamber (12) is cut into a left chamber (121) and a right chamber (122) which are isolated from each other, the flow distribution assembly (4) is arranged in the first chamber (11) for providing a uniform inlet flow field. The inlet assembly (2) is communicated with the first chamber (11), the outlet assembly (3) is communicated with the third chamber (13), the first chamber (11) and the third chamber (13) are simultaneously communicated with the right chamber (122), and the first chamber (11), the left chamber (121) and the third chamber (13) are sequentially isolated. The inner member experimental body (8) is arranged in the right chamber (122), and the pressure measuring assembly is respectively arranged on the side walls of the first chamber (11), the right chamber (122) and the third chamber (13).

2. The experimental apparatus for reactor thermal-hydraulics according to claim 1, characterized in that, The flow distribution assembly (4) comprises a plurality of spaced flow distribution plates (41), and each flow distribution plate (41) is provided with a plurality of uniform flow distribution holes (42).

3. The experimental apparatus for reactor thermal-hydraulics according to claim 1, characterized in that, The experimental device further comprises a flow hole experimental block (9) provided with flow holes (91), and the flow hole experimental block (9) is detachably connected with the bottom plate (5) to meet the experimental needs of studying the bypass flow resistance under different flow holes (91).

4. The experimental apparatus for reactor thermal-hydraulics according to claim 3, characterized in that, The experimental device further comprises a cover plate (10) arranged in the first chamber (11) and opposite to the flow hole experimental block (9), and a gap is left between the cover plate (10) and the flow hole experimental block (9).

5. The experimental apparatus for reactor thermal-hydraulics according to claim 1, characterized in that, The outer cylinder (1) comprises a front plate (14), a side plate (15), a rear plate (16) and a detachable panel (17), the side plate (15) is connected with the front plate (14) and the rear plate (16) respectively, the front plate (14) is provided with a window, and the detachable panel (17) can be detachably covered on the window.

6. The experimental apparatus for reactor thermal-hydraulics according to claim 5, characterized in that, The outer cylinder (1) further comprises a bottom flange (18). The inlet assembly (2) comprises the same inlet flange (21) and a gradually expanded inlet pipe section (22), and the bottom flange (18) is connected with the inlet flange (21).

7. The experimental apparatus for reactor thermal-hydraulics according to claim 5, characterized in that, The outer cylinder (1) further comprises a top flange (19). The outlet assembly (3) comprises the same outlet flange (31) and a gradually tapered outlet pipe section (32), and the top flange (19) is connected with the outlet flange (31).

8. The experimental apparatus for thermal-hydraulics of a nuclear reactor according to claim 1, characterized by The pressure measuring assembly comprises at least four lateral pressure measuring groups and a plurality of longitudinal pressure measuring groups, two lateral pressure measuring groups are respectively arranged on two sides of the bottom plate (5) and have the same spacing with the bottom plate (5), two lateral pressure measuring groups are respectively arranged on two sides of the top plate (7) and have the same spacing with the top plate (7), and the longitudinal pressure measuring groups are arranged between the bottom plate (5) and the top plate (7).

9. The experimental apparatus for thermal-hydraulics of a nuclear reactor according to any one of claims 5 to 7, characterized in that, The front plate (14) and the rear plate (16) are 1 / 8 arc-shaped plates, and the front plate (14) and the rear plate (16) are oppositely recessed.

10. The experimental apparatus of reactor thermal-hydraulics according to any one of claims 1 to 8, characterized in that, The reactor thermal-hydraulic experiment device further comprises at least two lifting lugs (20) and four supports (30), the at least two lifting lugs (20) are symmetrically connected to the outer side of the outer cylinder body (1), and the four supports (30) are symmetrically connected to the outer side of the outer cylinder body (1); the at least two lifting lugs (20) and the four supports (30) are distributed along the axial direction of the outer cylinder body (1).

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