Multifunctional cavitation jet test device

Abstract

The invention relates to the technical field of cavitation jet equipment, in particular to a multifunctional cavitation jet test device, which comprises a mounting frame; the circulating water tunnel main body is mounted on the mounting frame, a water tunnel space is formed in the circulating water tunnel main body, and an observation window is formed in the circulating water tunnel main body; the circulating unit is connected to the mounting frame, is connected with the circulating water tunnel main body and is used for changing the liquid flow rate and the liquid pressure in the water tunnel space; the cavitation nozzle is connected with the circulating water tunnel main body and located in the water tunnel space, and cavitation jet flow emitted by the cavitation nozzle is located in an interval right opposite to the observation window; the device has the advantages that the high-speed camera can conveniently shoot and record the cavitation formation, development and collapse process of the cavitation jet flow in different liquid flow states through the observation window, the cavitation jet flow can be conveniently emitted through the cavitation nozzle, and the circulating water tunnel main body and the circulating unit are matched to complete the research on the influence of the flow field characteristics on the cavitation jet flow action mechanism.

Description

Technical Field

[0001] The present application relates to the technical field of cavitation jet equipment, and in particular to a multifunctional cavitation jet test device. Background Art

[0002] Cavitation jet technology is a jet enhancement technology based on the principle of hydraulic cavitation. Through a specific nozzle structure, the pressure in certain areas is reduced to below the saturated vapor pressure of the liquid, resulting in the formation of a large number of cavitation bubbles in the jet beam. When the jet acts on the target object, it will burst and generate a certain high pressure locally, enhancing the erosion ability and efficiency of the jet, and improving the cleaning and fragmentation effects. The cavitation test device is a necessary condition for conducting cavitation research. Through controllable parameter experiments, the mechanisms and laws related to the formation, development and collapse of cavitation are explored, discovered and verified.

[0003] The universal cavitation test water tunnel is the most common cavitation test device, which is mainly used to study the cavitation characteristics of underwater vehicles and fluid machinery. However, due to the relatively low flow rate, it is difficult to form obvious material erosion in a short time, and a special cavitation test device is required. The current standard device for jet cavitation research is a submerged water jet test bench that meets the ASTMG134 standard. High-speed jet cavitation is generated in a sealed container using a high-pressure nozzle, and the specimen is placed in the cavitation collapse area to carry out the cavitation test. On this basis, the prior art discloses an underwater cavitation jet cleaning test bench, which includes: a test bench frame, on which a water tank is provided; a motion mechanism, which includes the first A motion device, a second motion device and a third motion device, the first motion device is connected to the experimental table frame, the second motion device is connected to the first motion device, the third motion device is connected to the second motion device, the first motion device drives the second motion device to move along the first direction, and the second motion device drives the third motion device to move along the second direction; a spray device is installed on the end of the third motion device and extends into the experimental space of the water tank, and the third motion device drives the spray device to move along the third direction, wherein the first direction, the second direction and the third direction are different from each other; a control device, the control device is electrically connected to the motion mechanism and the spray device.

[0004] Regarding the above-mentioned related technologies, although the disclosed underwater cavitation jet cleaning test bench can explore the cavitation effect by adjusting test parameters such as jet velocity, jet angle, target distance, nozzle type, etc., the cavitation jet is affected by the flow field characteristics in addition to the above-mentioned factors, and the underwater cavitation jet cleaning test bench cannot complete the study of the influence of flow field characteristics on the action mechanism of cavitation jet. Summary of the invention

[0005] In order to study the influence of flow field characteristics on the action mechanism of cavitation jet, the present application provides a multifunctional cavitation jet test device.

[0006] The multifunctional cavitation jet test device provided in this application adopts the following technical solution: A multifunctional cavitation jet test device, comprising: Install the frame; A circulating water tunnel body, wherein the circulating water tunnel body is installed on the installation frame, a water tunnel space is formed inside the circulating water tunnel body, and an observation window is provided on the circulating water tunnel body; A circulation unit, the circulation unit is connected to the mounting frame and is connected to the main body of the circulating water tunnel, and is used to change the liquid flow rate and liquid pressure in the water tunnel space; A cavitation nozzle is connected to the circulating water tunnel body and is located in the water tunnel space, and the cavitation jet emitted by the cavitation nozzle is located in the interval directly facing the observation window.

[0007] By adopting the above technical scheme, liquid is input into the main body of the circulating water tunnel through the circulation unit, and the liquid flow rate in the main body of the circulating water tunnel is changed by adjusting the input parameters of the circulation unit such as the liquid input speed, or the liquid pressure in the main body of the circulating water tunnel is changed by adjusting the input parameters of the circulation unit such as the liquid input-output ratio, and then the external high-pressure unit inputs liquid into the cavitation nozzle, and the liquid is ejected through the cavitation nozzle to form a cavitation jet, and the emission direction of the cavitation jet is kept parallel to the liquid flow direction in the main body of the circulating water tunnel, and then the cavitation formation, development and collapse process of the cavitation jet under different liquid flow states is recorded through the observation window on the main body of the circulating water tunnel with the help of a high-speed camera. The process is then studied and compared to analyze the cavitation formation, development and collapse processes under different liquid flow states, and the study on the influence of flow field characteristics on the action mechanism of cavitation jets is completed; the designed multifunctional cavitation jet test device can form a closed water tunnel space through the circulating water tunnel main body, and then cooperate with the circulation unit to realize the control of flow field characteristics in the water tunnel space such as fluid velocity and liquid pressure, and the observation window is convenient for a high-speed camera to record the cavitation formation, development and collapse processes of the cavitation jet under different liquid flow states, and the cavitation nozzle is convenient for emitting cavitation jets, so as to cooperate with the circulating water tunnel main body and the circulation unit to complete the study on the influence of flow field characteristics on the action mechanism of cavitation jets.

[0008] In a specific implementation scheme, the circulating water tunnel body includes: A test section, wherein the test section is connected to the mounting frame, a transparent window serving as an observation window is connected to the test section, the cavitation nozzle is detachably and fixedly connected to the test section, and a fixture for clamping a test sample is connected inside the test section; Two steady flow sections are symmetrically arranged with respect to the test section, and the steady flow sections are connected to the test section, and the liquid inlet and outlet of the circulation unit are respectively connected to the two steady flow sections.

[0009] By adopting the above technical scheme, the designed circulating water tunnel body can provide an installation basis for the cavitation nozzle and the steady flow section through the test section, an observation window can be formed through the transparent window, and the object to be tested can be clamped through the fixture, so as to study the cavitation effect of the cavitation jet on the object to be tested under different flow field characteristics.

[0010] In a specific embodiment, the steady flow section comprises: A hollow shell, wherein the hollow shell is connected to the test section, and the hollow shell is connected to the circulation unit; A porous partition, wherein the porous partition is installed in the hollow shell, and the connection between the circulation unit and the hollow shell is located on a side of the porous partition away from the test section; A plurality of guide plates are connected to the hollow shell, and the guide plates are located between the porous partition plate and the test section.

[0011] By adopting the above technical scheme, a steady flow section is designed, in which the hollow shell can provide installation space for the porous partition and the guide plate, and a water hole space is formed in cooperation with the test section. The porous partition can reduce the vortex scale of the incoming liquid flow and reduce the turbulence of the incoming flow. The guide plate can further promote the uniformity of the fluid flow, further reduce the influence of turbulence on the stability of the fluid flow state, and ensure the accuracy of the research on the action mechanism of cavitation jet.

[0012] In a specific possible implementation manner, an inspection door is detachably connected to the hollow shell.

[0013] By adopting the above technical solution, the designed inspection door can facilitate the cleaning, maintenance and replacement of the porous partition and the guide plate, and can quickly remove the test residues intercepted at the porous partition.

[0014] In a specific possible implementation manner, the inner hole size of the hollow shell gradually decreases toward one side of the test section.

[0015] By adopting the above technical solution, a hollow shell with a gradually decreasing inner hole size toward the test section can be designed to further promote the homogenization of fluid flow, thereby reducing the influence of turbulence on the stability of the fluid flow state and ensuring the accuracy of the study on the mechanism of cavitation jet action.

[0016] In a specific possible implementation scheme, a safety valve and an automatic exhaust valve are connected to the steady flow section.

[0017] By adopting the above technical solution, the designed safety valve and automatic exhaust valve can realize automatic discharge of liquid when the liquid pressure in the water tunnel space is too high. The bubbles generated by the contact between the cavitation jet and the flow field in the water tunnel space can be discharged through the automatic exhaust valve.

[0018] In a specific possible implementation scheme, a storage rack is connected to the installation frame, and the storage rack forms a placement platform on one side of the circulating water tunnel body.

[0019] By adopting the above technical solution, the designed storage rack can be convenient for placing observation and recording instruments such as high-speed cameras and lighting fixtures.

[0020] In a specific embodiment, the circulation unit includes a circulation pump, a water tank, at least one filter, two solenoid valves and a plurality of circulation pipes; The circulation pump, the water tank and the filter are connected in series through the circulation pipe to form a circulation body, and the circulation pipe connects the circulation body with the steady flow section; The solenoid valve is connected to the circulation pipe, and the two solenoid valves are respectively located at the water outlet and water inlet of the circulation pump.

[0021] By adopting the above technical solution, a circulation unit is designed. A circulation pump can provide power for the circulation of liquid in the water tunnel space. The water tank can temporarily store the extra liquid required for pressurization in the water tunnel space. The filter can purify the liquid, thereby reducing the influence of liquid impurities on the study of the action mechanism of cavitation jets or the study of cavitation effects on the object to be measured. The opening and closing of the solenoid valve can control the input and output flow of the water tunnel space, thereby changing the liquid pressure in the water tunnel space. The circulation pipe can connect the components in series to form a complete circuit.

[0022] In a specific possible implementation scheme, a plurality of fixed legs are connected to the test section, the fixed legs are provided with horizontally arranged strip grooves, and the connecting pieces between the fixed legs and the mounting frame are arranged through the strip grooves.

[0023] By adopting the above technical solution, the designed fixed legs can achieve the installation and fixation of the test section while completing the adjustment of the horizontal position of the test section.

[0024] In a specific possible implementation manner, a cover plate is detachably connected to the test section, and a three-axis platform is detachably connected to the test section, and the cavitation nozzle can be mounted on the three-axis platform to achieve three-dimensional motion in space.

[0025] By adopting the above technical scheme, the cover plate is first opened, and then the connecting structure between the cavitation nozzle and the test section is removed, and then the three-axis platform is installed on the test section. The three-axis platform extends into the water tunnel space through the gap corresponding to the cover plate to fix the cavitation nozzle, and then the three-axis platform drives the cavitation nozzle to move according to a preset trajectory, so that the cavitation jet ejected from the cavitation nozzle acts on the object to be tested with different jet velocities, jet angles and target distances, further improving the study on the influence of parameter changes brought about by the movement of the cavitation nozzle in a three-dimensional trajectory on the cavitation effect of the object to be tested; the designed cover plate and three-axis platform can cooperate to realize the three-dimensional spatial movement of the cavitation nozzle, further improving the study on the influence of parameter changes brought about by the movement of the cavitation nozzle in a three-dimensional trajectory on the cavitation effect of the object to be tested.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The designed multifunctional cavitation jet test device can form a closed water tunnel space through the circulating water tunnel body, and then cooperate with the circulation unit to realize the control of flow field characteristics in the water tunnel space such as fluid velocity and liquid pressure. The observation window is convenient for a high-speed camera to record the cavitation formation, development and collapse process of the cavitation jet under different liquid flow states. The cavitation jet is easy to emit through the cavitation nozzle, so as to cooperate with the circulating water tunnel body and the circulation unit to complete the study of the influence of flow field characteristics on the action mechanism of cavitation jet.

[0027] 2. The designed multifunctional cavitation jet test device can provide installation space for porous partitions and guide plates through the hollow shell, and form a water tunnel space in conjunction with the test section. The porous partition can reduce the vortex scale of the incoming liquid flow and reduce the turbulence of the incoming flow. The guide plate can further promote the uniformity of fluid flow and further reduce the influence of turbulence on the stability of the fluid flow state, thereby ensuring the accuracy of the study on the action mechanism of cavitation jets.

[0028] 3. The designed multifunctional cavitation jet test device can realize the three-dimensional spatial movement of the cavitation nozzle through the cover plate and the three-axis platform, and further improve the research on the influence of parameter changes brought about by the movement of the cavitation nozzle in a three-dimensional trajectory on the cavitation effect of the object to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of the multifunctional cavitation jet test device according to an embodiment of the present application.

[0030] Figure 2 yes Figure 1 Schematic diagram of the relative position structure of the fixture and cavitation nozzle in the water hole space.

[0031] Figure 3 yes Figure 2 Schematic diagram of the local structure of the medium steady flow section.

[0032] Figure 4 is Figure 3 Schematic diagram of the structure after further optimization of the foundation.

[0033] Figure 5 is Figure 2 On this basis, a schematic diagram of the assembly structure of the three-axis platform and the test section during the open experiment is shown.

[0034] Figure 6 yes Figure 5 Schematic diagram of the planar structure, mainly used to show the structure of the circulation unit.

[0035] Figure 7 It is a schematic diagram of the three-dimensional structure of the three-axis platform in the embodiment of the present application.

[0036] Explanation of the reference numerals: 1. Mounting frame; 2. Circulating water tunnel body; 21. Test section; 211. Transparent window; 212. Clamp; 213. Cover plate; 22. Flow stabilization section; 221. Hollow shell; 222. Porous partition; 223. Guide plate; 224. Inspection door; 23. Safety valve; 24. Automatic exhaust valve; 3. Circulation unit; 31. Circulation pump; 32. Water tank; 33. Filter; 34. Solenoid valve; 35. Circulation pipe; 4. Cavitation nozzle; 5. Storage rack; 6. Fixed leg; 61. Strip groove; 7. Three-axis platform; 8. Sensor group. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-7 This application is described in further detail.

[0038] The embodiment of the present application discloses a multifunctional cavitation jet testing device.

[0039] Reference Figure 1 A multifunctional cavitation jet test device includes a mounting frame 1 and a circulating water tunnel body 2. The circulating water tunnel body 2 is connected to the mounting frame 1, and a water tunnel space is formed inside the circulating water tunnel body 2. In order to facilitate the observation of the test conditions in the water tunnel space, the circulating water tunnel body 2 is provided with an observation window. In the present application, the number of observation windows on the circulating water tunnel body 2 can be one, two, or three, as long as the test conditions in the water tunnel space can be fully observed. In the present embodiment, the number of observation windows on the circulating water tunnel body 2 is two.

[0040] Reference Figure 2In order to complete the study of the mechanism of action of flow field characteristics on cavitation jet in the circulating water tunnel body 2, the multifunctional cavitation jet test device also includes a circulation unit 3 and a cavitation nozzle 4. The circulation unit 3 is connected to the mounting frame 1, and the circulation unit 3 is connected to the circulating water tunnel body 2 and communicated with the water tunnel space, and is used to change the liquid flow rate and liquid pressure in the water tunnel space; the cavitation nozzle 4 is installed on the circulating water tunnel body 2, and the cavitation nozzle 4 is located in the water tunnel space, and the cavitation jet emitted by the cavitation nozzle 4 is located in the observation interval directly opposite to the observation window, and the cavitation formation, development and collapse process of the cavitation jet in the water tunnel space under different liquid flow states is photographed and recorded by a high-speed camera.

[0041] Reference Figure 2 and Figure 3 In order to facilitate the formation of a stable circulating flow field with the circulation unit 3, the circulating water tunnel body 2 includes a test section 21 and two steady flow sections 22. The test section 21 is connected to the mounting frame 1, and a transparent window 211 as an observation window is connected to the test section 21 through a flange seal. The cavitation nozzle 4 is connected to the inner cavity of the test section 21 through a cavitation jet gun handle. In order to facilitate the fixation of the object to be tested, a fixture 212 for clamping and fixing the test sample is bolted in the test section 21. In this application, the fixture 212 is similar to a vise and can clamp a plate-shaped or cylindrical object to be tested. The fixture 212 is a slide rail slider structure. In terms of absolute coordinates, it can move forward and backward, left and right, and up and down. The Z axis toward the fixture 212 is used as a coordinate system reference. The cavitation jet gun handle can drive the cavitation nozzle 4 to independently realize displacement movement in the X-axis direction or the Y-axis direction.

[0042] Reference Figure 2 In order to measure the flow field characteristic parameters in the water tunnel space such as liquid flow rate, liquid pressure and liquid temperature, a sensor group 8 is flange-connected to the bottom wall of the test section 21. The sensor group 8 includes corresponding sensor types required to measure the aforementioned flow field characteristic parameters such as liquid flow rate sensor, liquid pressure sensor and liquid temperature sensor.

[0043] Reference Figure 2 and Figure 3 The stabilizing section 22 is symmetrically arranged with respect to the test section 21, and the stabilizing section 22 is sealedly connected to the test section 21 through a connecting flange. The test section 21 and the two stabilizing sections 22 cooperate to form a closed water tunnel space, and the liquid inlet and outlet of the circulation unit 3 are respectively connected to the two stabilizing sections 22 through flanges.

[0044] Reference Figure 2 and Figure 3Furthermore, in order to improve the uniformity of fluid flow in the flow field in the water tunnel space through the stabilizing section 22, the stabilizing section 22 includes a hollow shell 221, a porous partition 222 and a plurality of guide plates 223. The hollow shell 221 is flange-connected to the test section 21, and the hollow shell 221 is connected to the circulation unit 3. The porous partition 222 is bolted to the hollow shell 221, and the porous partition 222 divides the inner cavity of the hollow shell 221 into two chambers. The connection between the circulation unit 3 and the hollow shell 221 is located on the side of the porous partition 222 away from the test section 21. When the incoming flow passes through the multiple through holes on the porous partition 222, the vortex scale of the liquid incoming flow can be reduced, the turbulence of the incoming flow can be reduced, the kinetic energy of the water flow can be offset, and the flow rate of the water flow can be slowed down.

[0045] Reference Figure 3 and Figure 4 In the present application, the number of porous partitions 222 can be multiple, and the multiple porous partitions 222 are attached and arranged to form a porous group. The hollow shell 221 is provided with multiple bolt holes arranged in a straight line. When the porous partitions 222 are fixed, the bolts are inserted into different bolt holes, so that the overlapping area range of the holes between the multiple porous partitions 222 is changed, thereby changing the size of the connecting path of the chambers on both sides of the porous group, and the holes on the multiple porous partitions 222 can completely overlap; by setting up multiple porous partitions 222, on the basis of realizing the turbulence adjustment of the fluid in the test section 21 in the circulation unit 31, by changing the size of the overlapping area between the multiple porous partitions 222, the turbulence adjustment of the fluid in the test section 21 is increased by adjustable parameters. When changing the fluid parameters in the test section 21, it can be achieved by changing the input parameters of the circulation unit 3 or by changing the position parameters of the porous partition 222.

[0046] Reference Figure 2 and Figure 3 The guide plate 223 is bolted to the hollow shell 221. The guide plate 223 is located between the porous partition plate 222 and the test section 21, and the multiple guide plates 223 are arranged parallel to each other. By changing the spacing between the guide plates 223 or the angle between the guide plates 223 and the cavitation nozzle 4, the fluid flow can be further homogenized, the influence of turbulence on the stability of the fluid flow state can be further reduced, and the accuracy of the study on the action mechanism of the cavitation jet can be guaranteed.

[0047] Reference Figure 2 and Figure 3 In order to facilitate the cleaning, maintenance and replacement of the porous partition 222 and the guide plate 223, and to quickly remove the test residues intercepted at the porous partition 222, an inspection door 224 is bolted to the hollow shell 221, and a sealing ring is embedded between the inspection door 224 and the hollow shell 221 to ensure the sealing of the water tunnel space.

[0048] Reference Figure 3 In order to further promote the homogenization of fluid flow, thereby reducing the influence of turbulence on the stability of fluid flow state and ensuring the accuracy of the study on the action mechanism of cavitation jet, the inner hole size of the hollow shell 221 on the side facing the test section 21 is gradually reduced. By changing the inner hole size and coordinating the fluid flow direction in the water tunnel space, the flow can be homogenized and the effect of turbulence can be further reduced.

[0049] Reference Figure 3 In order to realize automatic discharge of liquid when the liquid pressure in the water tunnel space is too high, the bubbles generated by the contact between the cavitation jet and the flow field in the water tunnel space can be discharged through the automatic exhaust valve 24. A safety valve 23 and an automatic exhaust valve 24 are flange-connected on the hollow shell 221. The liquid is automatically discharged through the safety valve 23, and the bubbles in the water tunnel space are discharged through the automatic exhaust valve 24.

[0050] Reference Figure 5 In order to facilitate the placement of observation and recording instruments such as high-speed cameras and lighting fixtures, a rack 5 is connected to the mounting frame 1. The rack 5 is located on one side of the test section 21, and the rack 5 forms a placement platform on one side of the transparent window 211. In order to facilitate the height adjustment of the rack 5, a vertical adjustment groove is opened on the mounting frame 1. The sliding end of the rack 5 is slidably connected to the vertical adjustment groove, and the position of the rack 5 is fixed by bolts.

[0051] Reference Figure 5 In order to adjust the horizontal position of the test section 21 along the direction of the line connecting the two flow stabilizing sections 22, a plurality of fixed legs 6 are welded and fixed on the test section 21, and a horizontally arranged strip groove 61 is opened on the fixed legs 6. A plurality of connecting shafts are integrally connected to the mounting frame 1, and the connecting shafts are arranged through the strip groove 61, and fastening bolts are threadedly connected to the connecting shafts.

[0052] Reference Figure 6 In order to achieve the adjustment of the flow field characteristic parameters in the water tunnel space, it is further disclosed that the circulation unit 3 includes a circulation pump 31, a water tank 32, a filter 33, a solenoid valve 34 and a circulation pipe 35. The circulation pump 31, the water tank 32 and the filter 33 are flange-connected and connected in series through the circulation pipe 35 to form a circulation body, and the circulation pipe 35 connects and communicates the circulation body with the hollow shell 221 to form a complete liquid circulation loop; in the present application, the number of filters 33 can be one, two, or three, as long as the cleanliness of the liquid can be guaranteed. In the present embodiment, the number of filters 33 is two, and the two filters 33 are respectively arranged close to the two hollow shells 221.

[0053] Reference Figure 6In the present application, there are two solenoid valves 34, which are flange-connected to the circulation pipe 35, and the two solenoid valves 34 are respectively arranged in the liquid circulation loop near the two hollow shells 221, that is, the solenoid valves 34 are located at the water outlet side and the water inlet side of the circulation pump 31. By changing the flow through the two solenoid valves 34, the liquid input and liquid output in the water hole space can be changed, and finally the liquid pressure control in the water hole space can be achieved.

[0054] Reference Figure 5 , Figure 6 as well as Figure 7 In order to improve the study on the influence of parameter changes brought about by the movement of the cavitation nozzle 4 in a three-dimensional trajectory on the cavitation effect of the object to be tested, an operation port is opened on the test section 21, and a cover plate 213 for blocking the operation port is bolted to the test section 21, and a three-axis platform 7 is bolted to the test section 21. After the cavitation nozzle 4 is removed from the test section 21, it can be installed and fixed on the moving end of the three-axis platform 7 to realize the spatial three-dimensional movement of the cavitation nozzle 4, wherein the three-axis platform 7 includes a mounting substrate, a three-axis platform X-axis, a three-axis platform Y-axis and a three-axis platform Z-axis. The mounting substrate is bolted to the test section 21, and the three-axis platform Z-axis is used to install the cavitation jet gun handle of the cavitation nozzle 4.

[0055] The implementation principle of a multifunctional cavitation jet test device in an embodiment of the present application is as follows: in a closed state, liquid is input into the circulating water tunnel main body 2 through the circulation unit 3, and the liquid flow rate in the circulating water tunnel main body 2 is changed by adjusting the input parameters of the circulation unit 3 such as the liquid input speed, or the liquid pressure in the circulating water tunnel main body 2 is changed by adjusting the input parameters of the circulation unit 3 such as the liquid input-output ratio, and then the external high-pressure unit inputs liquid into the cavitation nozzle 4, and the liquid is ejected through the cavitation nozzle 4 to form a cavitation jet. The emission direction of the cavitation jet remains parallel to the liquid flow direction in the circulating water tunnel main body 2, and then a high-speed camera is used to record the cavitation formation, development and collapse process of the cavitation jet under different liquid flow states through the observation window on the circulating water tunnel main body 2, and then the cavitation formation, development and collapse process under different liquid flow states are studied and compared to analyze the cavitation formation, development and collapse process under different liquid flow states, to complete the study on the influence of flow field characteristics on the action mechanism of cavitation jets.

[0056] In the open state, the cover plate 213 is first opened, and then the connection structure between the cavitation nozzle 4 and the test section 21 is removed, and then the three-axis platform 7 is installed on the test section 21. The three-axis platform 7 extends into the water tunnel space through the gap corresponding to the cover plate 213 to fix the cavitation nozzle 4, and then the three-axis platform 7 drives the cavitation nozzle 4 to move according to a preset trajectory, so that the cavitation jet ejected from the cavitation nozzle 4 acts on the object to be tested with different jet velocities, jet angles and target distances, further improving the study on the influence of parameter changes brought about by the movement of the cavitation nozzle 4 in a three-dimensional trajectory on the cavitation effect of the object to be tested.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A multifunctional cavitation jet test device, characterized in that: include: Mounting frame (1); A circulating water tunnel body (2), the circulating water tunnel body (2) being mounted on the mounting frame (1), a water tunnel space being formed inside the circulating water tunnel body (2), and an observation window being provided on the circulating water tunnel body (2); A circulation unit (3), the circulation unit (3) being connected to the mounting frame (1), and the circulation unit (3) being connected to the circulation water tunnel body (2), and being used for changing the liquid flow rate and liquid pressure in the water tunnel space; A cavitation nozzle (4), the cavitation nozzle (4) is connected to the circulating water tunnel body (2) and is located in the water tunnel space, and the cavitation jet emitted by the cavitation nozzle (4) is located in the area directly facing the observation window.

2. The multifunctional cavitation jet test device according to claim 1, characterized in that: The circulating water tunnel body (2) comprises: A test section (21), the test section (21) being connected to the mounting frame (1), the test section (21) being connected to a transparent window (211) serving as an observation window, the cavitation nozzle (4) being detachably fixedly connected to the test section (21), and the test section (21) being connected to a fixture (212) for clamping a test sample; Two flow stabilizing sections (22), the two flow stabilizing sections (22) are symmetrically arranged with respect to the test section (21), the flow stabilizing sections (22) are connected to the test section (21), and the liquid inlet and outlet of the circulation unit (3) are respectively connected to the two flow stabilizing sections (22).

3. The multifunctional cavitation jet test device according to claim 2, characterized in that: The flow stabilizing section (22) comprises: A hollow shell (221), wherein the hollow shell (221) is connected to the test section (21), and the hollow shell (221) is connected to the circulation unit (3); A porous partition (222), wherein the porous partition (222) is installed in the hollow shell (221), and a connection between the circulation unit (3) and the hollow shell (221) is located on a side of the porous partition (222) away from the test section (21); A plurality of guide plates (223), wherein the guide plates (223) are connected to the hollow shell (221), and the guide plates (223) are located between the porous partition plate (222) and the test section (21).

4. The multifunctional cavitation jet test device according to claim 3, characterized in that: The hollow shell (221) is detachably connected to an inspection door (224).

5. The multifunctional cavitation jet test device according to claim 3, characterized in that: The inner hole size of the hollow shell (221) gradually decreases toward one side of the test section (21).

6. The multifunctional cavitation jet test device according to claim 2, characterized in that: The flow stabilizing section (22) is connected to a safety valve (23) and an automatic exhaust valve (24).

7. The multifunctional cavitation jet test device according to claim 1, characterized in that: The installation frame (1) is connected to a storage rack (5), and the storage rack (5) forms a placement platform on one side of the circulating water tunnel body (2).

8. The multifunctional cavitation jet test device according to claim 2, characterized in that: The circulation unit (3) comprises a circulation pump (31), a water tank (32), at least one filter (33), two solenoid valves (34) and a plurality of circulation pipes (35); The circulation pump (31), the water tank (32) and the filter (33) are connected in series via the circulation pipe (35) to form a circulation body, and the circulation pipe (35) connects the circulation body with the steady flow section (22); The solenoid valve (34) is connected to the circulation pipe (35), and the two solenoid valves (34) are respectively located at the water outlet and water inlet of the circulation pump (31).

9. The multifunctional cavitation jet test device according to claim 2, characterized in that: The test section (21) is connected to a plurality of fixed legs (6), the fixed legs (6) are provided with horizontally arranged strip grooves (61), and the connecting pieces between the fixed legs (6) and the mounting frame (1) are arranged through the strip grooves (61).

10. The multifunctional cavitation jet test device according to claim 2, characterized in that: The test section (21) is detachably connected to a cover plate (213), and the test section (21) is detachably connected to a three-axis platform (7), and the cavitation nozzle (4) can be installed on the three-axis platform (7) to achieve three-dimensional movement in space.

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