Impinging gas jet mechanism and impinging gas jet device

Abstract

The present application provides an impact gas jet mechanism and an impact gas jet device, which relate to the field of fluid mechanics research. The impact gas jet mechanism includes: an adjustment main body, a nozzle assembly, which is connected to the adjustment main body and can move relative to the adjustment main body, and the nozzle assembly can be positioned at any position in the movement trajectory of the nozzle assembly. The impact gas jet mechanism provided by the present application can adjust the position of the nozzle assembly relative to the adjustment main body, thereby enabling experiments to be carried out with different nozzle angles and meeting the experimental requirements for different control experiment conditions.

Description

Technical Field

[0001] This application relates to the field of fluid mechanics research, and in particular, to an impact gas jet mechanism and an impact gas jet device. Background Art

[0002] Jet impingement widely exists in the fields of industrial production and energy utilization, such as the impinging atomizing nozzle of liquid rocket engines, the material mixing and heat and mass transfer in combustion boilers, etc. At present, many research results have been obtained in jet impingement.

[0003] However, traditional impact jet mechanisms often have a single structure when dealing with different control experiment conditions, making it difficult to meet the experimental requirements for different control experiment conditions. During the experiment, the operation is inevitably complex and it is difficult to match the experimental conditions.

[0004] Traditional impact jet mechanisms also have the above problems in PIV (Particle Image Velocimetry) experiments. In addition, in PIV experiments, the CCD camera mainly relies on the scattering effect of tracer particles under the action of laser. The spreading concentration and uniformity of the tracer particles determine whether the particle velocity distribution is uniform and accurate. Existing equipment for PIV experiments is still difficult to effectively adjust the spreading concentration and uniformity of the tracer particles. Summary of the Invention

[0005] The first object of this application is to provide an impact air jet mechanism to meet the experimental requirements for different control experiment conditions.

[0006] The second object of this application is to provide an impact air jet device including the above impact air jet mechanism.

[0007] In a first aspect, this application provides an impact gas jet mechanism, which includes:

[0008] An adjustment body;

[0009] A nozzle assembly, connected to the adjustment body and capable of moving relative to the adjustment body, and the nozzle assembly can be positioned at any position in the movement trajectory of the nozzle assembly.

[0010] Preferably, the movement trajectory of the nozzle assembly forms a circle and is defined as a trajectory circle, and the impact gas jet mechanism includes a scale member that divides the angle of the trajectory circle.

[0011] Preferably, the adjustment body is annular, and the adjustment body includes an adjustment groove constructed along the trajectory circle on the adjustment body.

[0012] Preferably, the nozzle assembly includes:

[0013] Nozzle;

[0014] Slider, part of which is disposed in the adjustment groove and can be positioned at any position in the adjustment groove, and part of the slider is exposed outside the adjustment groove;

[0015] Indicator member, disposed on the part of the slider exposed outside the adjustment groove, and when observed along the axial direction of the adjustment body, part of the indicator member overlaps with the scale member;

[0016] First joint member, disposed on the part of the slider exposed outside the adjustment groove;

[0017] Second joint member, detachably connected to the first joint member;

[0018] Limiting member, connected to the second joint member and used for detachably clamping the nozzle.

[0019] Preferably, the adjustment groove is formed with a placement portion for placing the part of the slider disposed in the adjustment groove in the adjustment groove;

[0020] The diameter of the nozzle is formed to be 5 mm to 20 mm, and the nozzle is formed of stainless steel or quartz glass.

[0021] In a second aspect, the present application provides an impact gas jet device, and the impact gas jet device includes the impact gas jet mechanism as described above.

[0022] Preferably, the impact gas jet device is used for PIV experiments and further includes a gas generation mechanism, and the gas generation mechanism includes:

[0023] Accommodating member, defining an air chamber stabilizing cavity;

[0024] Throttle assembly, disposed in the air chamber stabilizing cavity and dividing the air chamber stabilizing cavity into a first cavity and a second cavity, and the throttle assembly is used for adjusting the amount of particles entering the second cavity from the first cavity;

[0025] Mixing component, part of which is disposed inside the air chamber stabilizing cavity, and the mixing component is used for increasing the vorticity of the flow field in the air chamber stabilizing cavity.

[0026] Preferably, the throttle assembly includes:

[0027] Throttle plate member, formed with a passing area defined by at least one hole portion, and the area of the throttle plate member except the passing area includes a throttling area;

[0028] A shielding plate member for shielding the passage area and capable of moving relative to the throttle plate member to adjust the degree of shielding of the passage area.

[0029] Preferably, the blending assembly includes:

[0030] A spiral tube including a first end and a second end, with the first end of the spiral tube closed;

[0031] A gas source communicated with the second end of the spiral tube via an intermediate pipeline;

[0032] An adjusting member disposed in the intermediate pipeline for adjusting the flow rate of the gas in the intermediate pipeline;

[0033] A flow rate member disposed in the intermediate pipeline for monitoring the flow rate of the gas flowing through the intermediate pipeline.

[0034] Preferably, the throttle assembly is arranged such that the volume ratio of the first cavity to the second cavity is 0.5.

[0035] The impact gas jet mechanism provided by the present application can adjust the position of the nozzle assembly relative to the adjustment body, thereby enabling different nozzle angles to be obtained for experiments and meeting the experimental requirements for different control experiment conditions.

[0036] To make the above objects, features, and advantages of the present application more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, provides detailed descriptions as follows. Description of the Drawings

[0037] To more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0038] Figure 1 A schematic diagram showing an isometric view of the impact gas jet device of the present application;

[0039] Figure 2 A schematic diagram showing the front view and partial cross-sectional view of the impact gas jet device of the present application;

[0040] Figure 3 Shows Figure 1 A schematic diagram of the partial view in;

[0041] Figure 4 A schematic diagram showing a part of the gas generation mechanism;

[0042] Figure 5 A schematic diagram of the spiral tube of the gas generating mechanism is shown.

[0043] Reference numerals:

[0044] 1 - adjustment main body; 11 - adjustment groove; 12 - dial; 13 - placement part; 2 - slider; 3 - nozzle support; 4 - nozzle; 5 - support seat;

[0045] 6 - cylindrical main body; 7 - spiral tube; 71 - flowmeter; 72 - regulating valve; 81 - throttle plate; 82 - shielding plate; 83 - throttle handle. Detailed implementation manners

[0046] The technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0047] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0048] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0049] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0050] See Figures 1 to 3, the impact gas jet device provided in this embodiment includes a support base, an adjustment main body, a dial, an adjustment groove, a slider, a nozzle support, and a nozzle. The connection relationships and working principles of the above components will be specifically described below.

[0051] As Figure 1 and Figure 2 shown, Figure 1 and Figure 2 substantially show a schematic diagram of the assembly drawing of the impact gas jet device provided in this embodiment, which includes an impact gas jet mechanism to be specifically described below, and also includes a particle generator to be described later. Therefore, in this part of the description, first refer to Figure 1 and Figure 2 in the middle, that is, the position where the impact gas jet mechanism is located. Based on this, the following will be specifically described in combination with Figure 3 the partial view of the impact gas jet mechanism given.

[0052] As Figure 1 shown, the support base 5 is used to support the adjustment main body 1, so that the assembly structure formed by the adjustment main body 1 and the support base 5 can be erected on a horizontal plane such as the ground. For this purpose, the support base 5 forms a plate-like structure as the base, and the plate-like structure is in direct contact with the aforementioned ground. The support base 5 may further include a beam-like structure connected to the upper side of the plate-like structure and a holding structure connected to the upper end of the beam-like structure. In the embodiment, the holding structure is used to connect with the adjustment main body 1 to hold the adjustment main body 1 in a predetermined posture relative to the ground. Since in the example given in this embodiment, the following slider 2 connected to the nozzle 4 can adjust its position within a range of 360 degrees, therefore, in order to give the adjustment groove 11 cooperating with the slider 2 relatively good positioning conditions during the processing, the adjustment main body 1 can be formed as a ring.

[0053] The aforementioned holding structure cooperates with the outer side of the adjustment main body 1, so the holding structure forms an arc surface adapted to the outer side of the adjustment main body 1. Preferably, the holding structure is formed as an arc-shaped plate member. Further, the holding structure and the adjustment main body 1 can be formed as a detachable fit. For example, the arc-shaped plate member forming the holding structure further forms through holes extending along the radial direction of the arc surface or substantially along the radial direction of the arc surface. Threaded holes are formed at corresponding positions on the adjustment main body 1. After the holding structure and the adjustment main body 1 are correctly positioned, the two are connected by screws, which is particularly beneficial for the storage, transportation, and maintenance of the mechanism.

[0054] In the embodiment, as mentioned above, the adjustment groove 11 is formed in the adjustment main body 1. In the embodiment, the adjustment groove 11 is formed as an annular groove, which can be coaxial with the adjustment main body 1, which is further beneficial for the positioning of the annular groove during processing. Here, especially refer to Figure 3, since the adjustment body 1 is formed in a ring shape, it is substantially defined by four surfaces, namely a first bottom surface and a second bottom surface facing each other, a first cylindrical surface on the radially inner side, and a second cylindrical surface on the radially outer side. In Figure 3 In the example given, the adjustment groove 11 is formed in the first bottom surface, and the first bottom surface is exactly the bottom surface of the adjustment body 1 that can be observed in the axonometric view given in Figure 1 . Still referring to Figure 3 , the setting of the annular adjustment groove 11 divides the first bottom surface into two partial surfaces in the radial direction, and the annular scale 12 can be arranged on at least one of these two partial surfaces. For example, only the annular scale 12 for recording angles is arranged on the partial surface on the radially inner side. In this setting method, since the partial surface on the radially inner side has a smaller diameter, it is beneficial to reduce the amount of material used for the annular scale 12.

[0055] In the embodiment, as shown in Figure 3 , the slider 2 can be formed in an arc shape or a substantially arc shape. Specifically, the adjustment groove 11 is formed with a placement portion 13, and the placement portion 13 has a greater width in the radial direction than the rest of the adjustment groove 11. Preferably, the placement portion 13 is configured to expand towards the radially inner side and towards the radially outer side relative to the rest of the adjustment groove 11, which is particularly beneficial for an operator to hold the slider 2 and place it into the placement portion 13 without causing interference of the edge of the placement portion with the operator's hand. More preferably, the extension length of the placement portion 13 in the radial direction is less than the extension length of the slider 2 in the radial direction, which enables a part of the slider 2 to be located in the rest of the adjustment groove 11 when the slider 2 is placed into the placement portion 13, so that the slider 2 can be supported by the rest of the adjustment groove 11 and will not be stuck in the placement portion 13. The placement portion 13 can be further located directly above the adjustment groove 11, so when the slider 2 is placed into the placement portion 13, the slider 2 has no or almost no tendency to slide, which is beneficial to improving the installation efficiency of the slider 2 and ensuring safety performance.

[0056] Further referring to Figure 3, when the slider 2 is disposed in the adjustment slot 11, the slider 2 includes two mating surfaces in the radial direction, the first mating surface located on the radially inner side and the second mating surface located on the radially outer side respectively cooperate with the two inner portions of the adjustment slot 11. Since both inner portions of the adjustment slot 11 are formed as arc surfaces, preferably, the first mating surface and the second mating surface can also be formed as arc surfaces having the same curvature as the inner portions of the adjustment slot 11 with which they respectively cooperate, which is beneficial to reducing the friction between the slider 2 and the adjustment slot 11. In addition, a pointer can be provided in the middle of the slider 2. For this purpose, the slider 2 can have a portion protruding from the first bottom surface of the adjustment body 1, that is, this portion (hereinafter referred to as the mounting portion) is not accommodated in the adjustment slot 11, and the pointer can be provided on the mounting portion. Thus, a part of the pointer can be suspended above the scale of the scale plate 12, avoiding the scale plate 12 being scratched by the pointer when the slider 2 moves.

[0057] On this basis, threaded holes are formed at two ends of the slider 2 in the radial direction. Such threaded holes are used to assemble fastening bolts so that the slider can be positioned at any angular position within a 360-degree circumferential angle. This is because when the fastening bolt is screwed in, the slider 2 will be deformed due to the gradual filling of the threaded hole, especially the size of the slider 2 in the radial direction will increase, which will increase the frictional force between the first mating surface of the slider 2 and the inner portion of the adjustment slot 11 with which it cooperates, and the frictional force between the second mating surface of the slider 2 and the inner portion of the adjustment slot 11 with which it cooperates. As a result, the slider 2 will be positioned at a certain position against the tendency of sliding along the adjustment slot 11 given by gravity. Advantageously, when the slider 2 is centered with the placement portion 13, that is, after the slider 2 is placed in the placement portion 13 and the lengths of the two sides of the slider 2 in the radial direction located in the remaining part of the adjustment slot 11 are equal, the two threaded holes are respectively provided in the two parts of the slider 2 located in the remaining part of the adjustment slot 11. This enables that no matter how the slider 2 moves in the adjustment slot 11, there is always at least a part of the slider 2 where the threaded hole is located that forms a fit with the remaining part of the adjustment slot 11, so that the fit between the fastening bolt and the threaded hole can always play a role in positioning the slider 2. Due to such a setting, the slider 2 can always be reliably positioned.

[0058] In the embodiment, the mounting portion of the slider 2 can further be used to connect with the nozzle bracket 3. Specifically, the mounting portion of the slider 2 and the nozzle bracket 3 can be formed as a detachable installation, for example, installed in a snap-fit manner. In the embodiment, the mounting portion of the slider 2 can be provided with a male connector, and the nozzle bracket 3 can be provided with a female connector, and the two are snap-fitted as described above. This is particularly beneficial for replacing the nozzle bracket 3, which enables the nozzle bracket 3 and the nozzle 4 clamped by it to be quickly replaced in a targeted manner when dealing with some different control experiment conditions.

[0059] In an embodiment, the nozzle support 3 further includes a clamping member connected to the female joint. Still referring to Figure 3 , the clamping portion can be formed as an open clamping ring, and the two ends of the clamping ring can be tightened by screws, thereby clamping the nozzle 4. In this way, the nozzle 4 can also be quickly replaced, that is, nozzles 4 of different sizes can be replaced, so as to ensure meeting the requirements of different control experiment conditions. For example, the diameter of the nozzle 4 can be 5 mm to 20 mm, such as 5 mm, 10 mm or 14 mm. This is because when the diameter range of the nozzle 4 is 5 mm to 20 mm, the experiment will be more targeted and practically significant. In addition, in order to deal with particles in different experiments and ensure good stability of the storage, the nozzle 4 can be further formed of quartz glass or stainless steel.

[0060] In addition, according to the features described above, the assembly structure of the slider 2, the nozzle support 3 and the nozzle 4 described above can include at least two groups to ensure that the impact gas jet mechanism can at least complete the collision experiment.

[0061] According to the features described above, the impact gas jet device in this embodiment will be further described below. The impact gas jet device includes a gas generation mechanism, and the gas generation mechanism can correspond to the number of nozzles 4 to provide experimental particles for the impact gas jet experiment. As Figure 1 shown, because Figure 1 two nozzles 4 are given in the example of

[0062] As Figure 1 and Figure 2 shown, a gas generator includes a cylindrical main body 6 (such as a cylindrical main body), and an air chamber stabilizing cavity is defined inside the cylindrical main body 6. The air chamber stabilizing cavity mentioned here means that the air chamber stabilizing cavity is in a closed state, so as to prevent the following tracer particles from escaping from the air chamber stabilizing cavity, enabling the tracer particles to safely exist in the air chamber stabilizing cavity and gradually distribute evenly in the air chamber stabilizing cavity under the drive of the air flow released by the following spiral tube 7. The gas generator further includes a throttling component, and the throttling component divides the air chamber stabilizing cavity into upper and lower parts, which are hereinafter referred to as the upper cavity and the lower cavity (this is particularly shown in Figure 2 ). As Figure 4 shown, Figure 4Shows the part of the cylindrical body 6 for defining the lower cavity and the throttling assembly. Among them, the lower cavity of the cylindrical body 6 is used to add tracer particles suitable for PIV experiments. As an example, the tracer particle addition pipeline is arranged below the lower cavity. In the embodiment, the part of the cylindrical body 6 for defining the lower cavity and the part of the cylindrical body 6 for defining the upper cavity can be connected by a flange structure and bolts.

[0063] In the embodiment, the throttling assembly includes a throttle plate 81 and a shielding plate 82. Among them, the throttle plate 81 is formed as a circle and is arranged on the part of the cylindrical body 6 for defining the lower cavity, and a through area with multiple holes can be formed thereon. Relative to this through area, the remaining area includes a throttling area (that is, the area that can block tracer particles). The shielding plate 82 can be connected to the throttle handle 83 exposed below the cylindrical body 6. By rotating the throttle handle 83, the shielding plate 82 shields the through area of the throttle plate 81 to different degrees, so as to be able to adjust the amount of tracer particles entering the lower cavity to adapt to the tracer particle concentration required for PIV experiments, so as to meet the requirements of different control experiment conditions.

[0064] Figure 4 In the given example, the areas of the through area and the throttling area of the throttle plate 81 each account for half of the area of the throttle plate 81. The through area is divided into 3 blocks, and the throttling area is divided into 3 blocks. Each through area is located between two throttling areas. Therefore, preferably, each through area and throttling area correspond to a central angle of 60 degrees. In the embodiment, the shielding plate 82 is formed in the same shape as the three throttling areas. Figure 4 What is shown in is exactly the situation where the shielding plate 82 coincides with the three throttling areas. This setting is particularly beneficial for tracer particles to enter the lower cavity more evenly, because the degree of shielding of each through area by the action of the shielding plate 82 is the same.

[0065] See Figure 2 And in combination with Figure 5 , a spiral tube 7 is arranged in the upper cavity of the shielding plate 82. The bolt tube can be arranged along the vertical direction so that the following gas gradually rises along the spiral tube 7. The spiral tube 7 includes a first end located above and a second end located below, and the first end is in a closed state. The second end of the spiral tube 7 is connected to a gas source through an intermediate pipeline. A regulating valve 72 can be arranged on the intermediate pipeline to be used for regulating the gas flow rate, such as a 1 / 4 turn cock valve. A flowmeter 71 can also be arranged on the intermediate pipeline to monitor the gas flow rate.

[0066] In an embodiment, through holes are randomly formed in the spiral tube 7 at every predetermined dimension interval. For example, through holes with a diameter of approximately 2 mm are formed at every interval of approximately 10 mm, and the number of through holes can be, for example, 2 to 3. The "random" mentioned here means that since the spiral tube 7 extends along a spiral line, every time it passes approximately 10 mm on the spiral line, the spiral tube 7 is sectioned by a plane perpendicular to the spiral line to obtain a circular cross-section. The so-called approximately 10 mm means that the interval value taken can be near 10 mm. Points are randomly selected on the circumference defined by the cross-section, and these points are used as the centers of the above-mentioned through holes. In this way, when the gas entering the spiral tube 7 rotates and ejects, the vorticity of the flow field in the upper cavity is enhanced, thereby reducing the agglomeration effect of tiny tracer particles due to physical or chemical effects, so that the tracer particles are uniformly mixed with the air flow. These tracer particles mixed with the air flow flow through the pipeline to the nozzle 4, and this pipeline can be arranged above the upper cavity. In addition, in the embodiment, the throttling component can be located at the lower one-third of the air chamber stable cavity, which is particularly beneficial for leaving enough space for the spiral tube 7 to ensure the above-mentioned mixing effect.

[0067] The foregoing are only the preferred embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent structural transformation made by using the content of the specification and drawings of the present application under the innovative concept of the present application, or any direct / indirect application in other related technical fields is included in the protection scope of the present application.

Claims

1. An impact gas jet device, characterized in that, the impact gas jet device includes an impact gas jet mechanism, and the impact gas jet mechanism includes: an adjustment body; a nozzle assembly, connected to the adjustment body and capable of moving relative to the adjustment body, and the nozzle assembly can be positioned at any position in the movement trajectory of the nozzle assembly; wherein, the movement trajectory of the nozzle assembly forms a circle and is defined as a trajectory circle, and the impact gas jet mechanism includes a scale member that divides the angle of the trajectory circle; the impact gas jet device is used for PIV experiments, and further includes a gas generation mechanism, and the gas generation mechanism includes: a housing member that defines a gas chamber stable cavity; a throttling assembly, disposed in the gas chamber stable cavity and dividing the gas chamber stable cavity into a first cavity and a second cavity, and the throttling assembly is used to adjust the amount of particles entering the second cavity from the first cavity; a mixing assembly, a part of the mixing assembly is disposed inside the gas chamber stable cavity, and the mixing assembly is used to increase the vorticity of the flow field in the gas chamber stable cavity; wherein, the number of the nozzle assemblies is two, and for each nozzle assembly, one gas generation mechanism is connected.

2. The impact gas jet device according to claim 1, characterized in that, the adjustment body is formed in a ring shape, and the adjustment body includes an adjustment groove constructed along the trajectory circle on the adjustment body.

3. The impact gas jet device according to claim 2, characterized in that, the nozzle assembly includes: a nozzle; a slider, a part of the slider is disposed in the adjustment groove and can be positioned at any position in the adjustment groove, and a part of the slider is exposed outside the adjustment groove; an indicating member, disposed on the part of the slider exposed outside the adjustment groove, and when observing along the axial direction of the adjustment body, a part of the indicating member overlaps with the scale member; a first joint member, disposed on the part of the slider exposed outside the adjustment groove; a second joint member, detachably connected to the first joint member; a limiting member, connected to the second joint member and used to detachably clamp the nozzle.

4. The impact gas jet device according to claim 3, characterized in that, the adjustment groove is formed with a placement portion for placing the part of the slider disposed in the adjustment groove in the adjustment groove; the diameter of the nozzle is formed to be 5 mm to 20 mm, and the nozzle is formed of stainless steel or quartz glass.

5. The impact gas jet device according to claim 1, characterized in that, the throttling assembly includes: a throttle plate member, formed with a through area defined by at least one hole portion, and the area of the throttle plate member other than the through area includes a throttling area; a shielding plate member, used to shield the through area and capable of moving relative to the throttle plate member to adjust the degree of shielding of the through area.

6. The impact gas jet device according to claim 1, characterized in that, the mixing assembly includes: a spiral tube, including a first end and a second end, and the first end of the spiral tube is closed; A gas source, which is communicated with the second end of the spiral pipe via an intermediate pipeline; A regulating member, which is arranged in the intermediate pipeline and is used for regulating the flow rate of the gas in the intermediate pipeline; A flow rate member, which is arranged in the intermediate pipeline and is used for monitoring the flow rate of the gas flowing through the intermediate pipeline.

7. The impact gas jet device according to claim 1, wherein, the throttling assembly is arranged such that the volume ratio of the first cavity to the second cavity is 0.5.

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