Fluid test platform

Abstract

The present disclosure provides a fluid test platform, which includes an atmospheric pressure fluid area for providing an atmospheric pressure fluid environment and a high-pressure static area for providing a high-pressure environment. The atmospheric pressure fluid area includes a test section, and the high-pressure static area includes a high-pressure tank and a telescopic member disposed in the high-pressure tank. The high-pressure tank is detachably connected to the test section to have a connected state and a separated state relative to the atmospheric pressure fluid area. When the high-pressure tank is in a connected state relative to the atmospheric pressure fluid area, the telescopic member can extend into the test section. The present disclosure can not only meet the requirements of high-pressure experiments but also meet the requirements of low-pressure tests, so as to be used to verify the feasibility of ocean-related equipment and provide reliable data support for the subsequent research and development of ocean-related equipment. Moreover, by setting the atmospheric pressure fluid area and the high-pressure static area separately, the construction cost of the test platform can be greatly reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of marine equipment test platforms, and more particularly, to a fluid test platform. Background Art

[0002] During the use of marine equipment such as submersible vehicles and submarines, pressure fluctuations, noise vibrations, etc. often occur. These factors can expose the specific location of the marine equipment and seriously affect its safe use.

[0003] Therefore, it is necessary to develop a test platform that can be used to experimentally study the pipeline pressure fluctuations, pressure shock laws, and vibration and noise characteristics of the equalization system and the hydrophobic system under different conditions, so as to explore the low-noise operation and control laws of the system, verify the feasibility of related new technologies and new equipment, and provide reliable data support for the research and development of subsequent marine-related equipment. Summary of the Invention

[0004] In view of this, according to the present disclosure, a fluid test platform is provided, and the technical solution is as follows.

[0005] A fluid test platform, comprising:

[0006] An atmospheric pressure fluid area for providing an atmospheric pressure fluid environment, the atmospheric pressure fluid area including a test section; and

[0007] A high-pressure static area for providing a high-pressure environment, the high-pressure static area including a high-pressure tank and a telescopic member disposed within the high-pressure tank;

[0008] Wherein, the high-pressure tank is detachably connected to the test section to have a connected state and a separated state relative to the atmospheric pressure fluid area. When the high-pressure tank is in a connected state relative to the atmospheric pressure fluid area, the telescopic member can extend into the test section.

[0009] In an implementable embodiment, the atmospheric pressure fluid area further includes a water pump section. The test section has a fluid inlet and a fluid outlet. The water pump section has a first end and a second end. The first end is connected to the fluid inlet, and the second end is connected to the fluid outlet to form a circulating atmospheric pressure fluid.

[0010] In an implementable embodiment, there is a stable section and a contraction section between the first end and the fluid inlet. The stable section has a steady flow inlet and a steady flow outlet. The cross-sectional area of the stable section remains unchanged from the steady flow inlet to the steady flow outlet. The contraction section is connected between the steady flow outlet and the fluid inlet, and the cross-sectional area of the contraction section gradually decreases from the steady flow outlet to the fluid inlet.

[0011] In an implementable embodiment, a steady flow member for reducing the turbulence intensity is disposed within the stable section.

[0012] In one possible implementation, the contraction section has a length L, and the diameter of the steady flow outlet is defined as D, where L = (0.5 - 1) × D.

[0013] In one possible implementation, there is a transition section between the steady flow inlet and the first end. The transition section has a transition inlet and a transition outlet. The diameter of the transition outlet is equal to that of the steady flow inlet, and the diameter of the transition inlet is equal to that of the first end. And from the transition inlet to the transition outlet, the cross-sectional area of the transition section gradually increases.

[0014] In one possible implementation, there are also a first corner section and a second corner section between the steady flow inlet and the transition outlet. Flow guiding vanes are arranged in both the first corner section and the second corner section.

[0015] In one possible implementation, there is a diffusion section between the fluid outlet and the second end for decelerating and diffusing the pressure of the fluid flowing out from the fluid outlet. The diffusion section has a diffusion inlet and a diffusion outlet. The diameter of the diffusion inlet is equal to that of the fluid outlet, and the diameter of the diffusion outlet is equal to that of the second end. And from the diffusion inlet to the diffusion outlet, the cross-sectional area of the diffusion section gradually increases.

[0016] In one possible implementation, there are also a third corner section and a fourth corner section between the diffusion outlet and the second end. Flow guiding vanes are arranged in both the third corner section and the fourth corner section.

[0017] In one possible implementation, the flow guiding vane includes an arc section and a straight section, and the straight sections are respectively connected to both ends of the arc section.

[0018] The present disclosure has the following beneficial effects: Based on the settings of the atmospheric pressure fluid area and the high-pressure static area, when a high-pressure test needs to be performed, the high-pressure tank is in a separated state relative to the atmospheric pressure fluid area, and the high-pressure static area is independent, so as to meet the requirements of performing a high-pressure test; when a low-pressure test needs to be performed, the high-pressure tank is in a connected state relative to the atmospheric pressure fluid area, and the telescopic member can extend the test piece into the test section; it can meet both the requirements of high-pressure experiments and low-pressure tests, so as to be used to verify the feasibility of marine-related equipment and provide reliable data support for the subsequent research and development of marine-related equipment; and by setting the atmospheric pressure fluid area and the high-pressure static area separately, the construction cost of the test platform can be greatly reduced.

[0019] The following will, in conjunction with the accompanying drawings, detail the advantages and features of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following drawings of the present disclosure are hereby incorporated as part of the present disclosure for understanding the present disclosure. The embodiments of the present disclosure shown in the drawings and their descriptions are used to explain the principles of the present disclosure. In the drawings,

[0021] Figure 1 is a perspective view of a fluid test platform according to an exemplary embodiment of the present disclosure (the high-pressure tank is in a communicating state with the atmospheric-pressure fluid region);

[0022] Figure 2 is a perspective view of the fluid test platform with the high-pressure static region removed according to an exemplary embodiment of the present disclosure;

[0023] Figure 3 is Figure 2 a top view of the fluid test platform of

[0024] Figure 4 is Figure 1 a schematic structural view of the flow guiding vane in

[0025] Figure 5 is Figure 1 a structural view of the high-pressure static region in

[0026] Explanation of reference numerals in the drawings:

[0027] 10. Atmospheric-pressure fluid region; 11. Test section; 111. Fluid inlet; 112. Fluid outlet; 12. Water pump section; 121. First end; 122. Second end; 13. Stabilizing section; 131. Steady-flow inlet; 132. Steady-flow outlet; 14. Contraction section; 15. Transition section; 151. Transition inlet; 152. Transition outlet; 161. First corner section; 1611. First docking end; 162. Second corner section; 163. Third corner section; 164. Fourth corner section; 17. Diffusion section; 171. Diffusion inlet; 172. Diffusion outlet; 18. Flow guiding vane; 181. Arc section; 182. Straight section; 19. Constant cross-section section; 20. High-pressure static region; 21. High-pressure tank; 22. Expansion member; 30. Support; 40. Base; 200. Test piece. Detailed implementation manners

[0028] In the following description, a large number of details are provided to enable a thorough understanding of the present disclosure. However, those skilled in the art can understand that the following description only exemplarily shows alternative embodiments of the present disclosure, and the present disclosure can be implemented without one or more such details. In addition, to avoid confusion with the present disclosure, some technical features well known in the art are not described in detail.

[0029] The fluid test platform of the present disclosure is mainly used for test pieces such as ocean-related equipment to conduct experimental research on the pipeline pressure fluctuations, pressure shock laws, and vibration and noise characteristics of the equalization system and the hydrophobic system under different conditions, so as to verify the feasibility of related new technologies and new equipment and provide reliable data support for the subsequent research and development of ocean-related equipment.

[0030] As Figures 1 to 5 shown, the fluid test platform includes an atmospheric pressure fluid area 10 and a high-pressure static area 20. The atmospheric pressure fluid area 10 is used to provide an atmospheric pressure fluid environment. Based on the atmospheric pressure fluid environment, the force curve of the separating rudder blade (the rudder blade is the test piece 200 described later) under the navigation state can be simulated, and the vibration and noise characteristics of the steering hydraulic system under the load state can be tested, etc. The atmospheric pressure fluid area 10 can be installed on the base 40 through a plurality of struts 30. The high-pressure static area 20 is used to provide a high-pressure environment. Based on the high-pressure environment, a 6 Mpa water pressure test of the submersible components can be completed.

[0031] The atmospheric pressure fluid area 10 includes a test section 11. During low-pressure tests, the test piece 200 is arranged in the test section 11 for experimental research. The high-pressure static area 20 includes a high-pressure tank 21 and a telescopic member 22 arranged in the high-pressure tank 21. The high-pressure tank 21 is detachably connected to the test section 11 to have a connected state and a separated state relative to the atmospheric pressure fluid area 10. When the high-pressure tank 21 is in a connected state relative to the atmospheric pressure fluid area 10, the telescopic member 22 can extend into the test section 11. The high-pressure tank 21 and the test section 11 can be connected by a flange, and the flange is detachable and replaceable. When conducting a high-pressure test, a fully enclosed flange is replaced to separate the two areas of the atmospheric pressure fluid area 10 and the high-pressure static area 20 to prevent the atmospheric pressure test section 11 from being affected by high pressure; when conducting a low-pressure test, the flange can be replaced with a transparent one to facilitate the telescopic member 22 to pass through the bottom of the high-pressure tank 21 to place the test piece 200 into the test section 11. That is to say, based on the settings of the atmospheric pressure fluid area 10 and the high-pressure static area 20, when a high-pressure test is required, the high-pressure tank 21 is in a separated state relative to the atmospheric pressure fluid area 10, and the high-pressure static area 20 is independent, so as to meet the requirements of high-pressure tests; when a low-pressure test is required, the high-pressure tank 21 is in a connected state relative to the atmospheric pressure fluid area 10, and the telescopic member 22 extends the test piece 200 into the test section 11, so that the test platform can not only meet the requirements of high-pressure experiments but also meet the requirements of low-pressure tests, thus being able to verify the feasibility of ocean-related equipment and provide reliable data support for the subsequent research and development of ocean-related equipment; and, by setting the atmospheric pressure fluid area 10 and the high-pressure static area 20 separately, the construction cost of the test platform can be greatly reduced.

[0032] In one embodiment of the present disclosure, the atmospheric pressure fluid region 10 adopts a closed-loop structure. Specifically, the atmospheric pressure fluid region 10 includes a water pump section 12, and a water pump can be arranged inside the water pump section 12 to pump fluid. The test section 11 has a fluid inlet 111 and a fluid outlet 112, both the fluid inlet 111 and the fluid outlet 112 are in a closed form. The test section 11 can be of a constant cross-section in the length direction (the length direction corresponds to the fluid flow direction). The fluid inlet 111 and the fluid outlet 112 can be rectangular, and the area of the rectangle can be 1 m × 1 mm. The length of the test section 11 can be 2 m. At the same time, a transparent observation window can be installed on the wall of the test section 11 to facilitate test display and measurement. The water pump section 12 has a first end 121 and a second end 122. The first end 121 is connected to the fluid inlet 111, and the second end 122 is connected to the fluid outlet 112 to form a circulating atmospheric pressure fluid. The flow direction of the atmospheric pressure fluid in the atmospheric pressure fluid region 10 is: flowing from the first end 121 of the water pump section 12 to the fluid inlet 111 of the test section 11, and then flowing back from the fluid outlet 112 of the test section 11 to the second end 122 of the water pump section 12.

[0033] Downstream of the water pump section 12, a stabilizing section 13 and a converging section 14 can also be provided. Referring jointly to Figure 2 and Figure 3 , there are a stabilizing section 13 and a converging section 14 between the first end 121 and the fluid inlet 111. The stabilizing section 13 has a steady flow inlet 131 and a steady flow outlet 132. The cross-sectional area of the stabilizing section 13 remains unchanged from the steady flow inlet 131 to the steady flow outlet 132 (that is to say, the stabilizing section 13 is of a constant cross-section). The converging section 14 is connected between the steady flow outlet 132 and the fluid inlet 111, and the cross-sectional area of the converging section 14 gradually decreases from the steady flow outlet 132 to the fluid inlet 111. If the contraction ratio of the converging section 14 is taken as 4, then in order to correspond to the test section 11 with a size of 1 m × 1 mm, the side length of the stabilizing section 13 can be 2 m, and the overall length of the converging section 14 can be 1.7 m. Not shown, a steady flow component for reducing the turbulence intensity is arranged inside the stabilizing section 13 (the steady flow component is not shown in the figure), and the steady flow component can be a honeycomb device and a damping mesh. In addition, the length of the converging section 14 cannot be too long, which will increase the production and manufacturing cost and cause waste; of course, it cannot be too short either, otherwise the converging section 14 may not achieve a good effect of pressure reduction and acceleration. The converging section 14 has a length L, and the diameter of the steady flow outlet 132 is defined as D (since the converging section 14 corresponds to the steady flow outlet 132, the steady flow outlet 132 is the starting end of the converging section 14). On the premise of ensuring the performance of the converging section 14, L = (0.5 - 1) × D. In one embodiment of the present disclosure, D is 2 m, the length L of the converging section 14 is taken as 1.5 m, and the contraction curve of the converging section 14 adopts the Weisinski curve. It should be noted that for the stabilizing section 13 with a rectangular cross-section, the diameter corresponds to the side length of the rectangle, and for the stabilizing section 13 with a circular cross-section, the diameter corresponds to the diameter of the circle.

[0034] The cross-sectional dimension of the water pump section 12 is small, while that of the stabilizing section 13 is large. The two cannot be connected by direct contact. To facilitate the connection, there is also a transition section 15 between the steady flow inlet 131 and the first end 121. The transition section 15 has a transition inlet 151 and a transition outlet 152. The diameter of the transition outlet 152 is equal to that of the steady flow inlet 131, and the diameter of the transition inlet 151 is equal to that of the first end 121. And from the transition inlet 151 to the transition outlet 152, the cross-sectional area of the transition section 15 gradually increases. There is no strict requirement for the length of the transition section 15, but its length should be appropriate. Too long will increase the manufacturing cost of the test platform, and too short will affect the flow characteristics of the incoming flow of the water pump section 12.

[0035] Refer again to Figure 2 , there are also a first corner section 161 and a second corner section 162 between the steady flow inlet 131 and the transition outlet 152. Flow guiding vanes 18 are arranged in both the first corner section 161 and the second corner section 162. The first corner section 161 has a first docking end 1611 that docks with the transition outlet 152. To ensure that the fluid does not undergo wall separation after entering the first corner section 161, the outer wall surface of the transition section 15 at the transition outlet 152 is flush with the outer wall surface of the first docking end 1611. To ensure that the fluid turns well, both the first corner section 161 and the second corner section 162 are of equal cross-section. Since the fluid is prone to centrifugal force from the curvature center to the outer wall at the turning position, based on the setting of the flow guiding vanes 18, the centrifugal force can be overcome, so that the fluid entering the test section 11 has better stability and uniformity.

[0036] The flow guiding vane 18 can be in the shape of an arc thin plate. As Figure 4 shown, the flow guiding vane 18 includes an arc section 181 and a straight section 182. The straight sections 182 are respectively connected to both ends of the arc section 181. Based on the setting of the flow guiding vane 18 with this structure, the centrifugal force can be better overcome, so that the fluid entering the test section 11 has better stability and uniformity.

[0037] To decelerate, expand the pressure and prevent separation of the fluid flowing out of the test section 11, and reduce the pressure loss along the way, there is a diffusion section 17 between the fluid outlet 112 and the second end 122 for decelerating and expanding the pressure of the fluid flowing out of the fluid outlet 112. The diffusion section 17 has a diffusion inlet 171 and a diffusion outlet 172. The diameter of the diffusion inlet 171 is equal to that of the fluid outlet 112 for convenient docking, and the diameter of the diffusion outlet 172 is equal to that of the second end 122. And from the diffusion inlet 171 to the diffusion outlet 172, the cross-sectional area of the diffusion section 17 gradually increases. In a specific embodiment of the present disclosure, the diffusion section 17 uses a 7° diffusion angle (full angle) to expand the test section 11 from 1m×1m to 1.4m×1.4m.

[0038] Furthermore, there are also a third corner section 163 and a fourth corner section 164 between the diffusion outlet 172 and the second end 122. Since the caliber of the diffusion outlet 172 is equal to that of the second end 122 and in order to ensure that the fluid turns well, both the third corner section 163 and the fourth corner section 164 are of constant cross-section, and flow guiding vanes 18 are also arranged in the third corner section 163 and the fourth corner section 164. Based on the arrangement of the flow guiding vanes 18 in the third corner section 163 and the fourth corner section 164, the centrifugal force can also be overcome, so that the fluid flowing back to the water pump section 12 has better stability and uniformity.

[0039] In a specific embodiment of the present disclosure, the third corner section 163 and the fourth corner section 164 can be connected by a constant cross-section section 19. The constant cross-section section 19 can well guide the fluid in the test section 11 to the water pump section 12 and ensure a certain uniformity to avoid phenomena such as cavitation. The cross-section of the constant cross-section section 19 can be 1.4 m × 1.4 m, and the length of the constant cross-section section 19 can be about 10 m. It should be understood that the constant cross-section section 19 can be cancelled according to actual needs, that is to say, the third corner section 163 and the fourth corner section 164 can also be directly connected.

[0040] For the fluid test platform of the above embodiment, the unstructured grid dynamic grid technology is used to solve the incompressible viscous Reynolds-averaged N-S equations to simulate the complex flow field structure of multiphase flow for the performance verification calculation in the atmospheric pressure water flow area. The simulation calculation results show that along the fluid flow direction, the velocity distribution in the test section is uniform, and there is no obvious low-velocity area on the whole cross-section, and the flow field is uniform. And, according to the calculation results, the velocity data of the test area in the test section are extracted, and the average velocity of the test section is 3.14 m / s, the maximum deviation from the average velocity is 0.04 m / s, the velocity non-uniformity is 1.3%, and the turbulence intensity is 1.9%. Both the velocity non-uniformity and the turbulence intensity are at a relatively low level.

[0041] Based on the above, it can be seen that the present disclosure has the following advantages:

[0042] (1) By the idea of high and low pressure test zoning, the construction cost of the test platform is greatly reduced;

[0043] (2) The design of the atmospheric pressure fluid area is reasonable, ensuring low turbulence intensity in the test section under high speed conditions;

[0044] (3) The whole platform can be manufactured modularly, with a simple structure and easy to disassemble and assemble;

[0045] (4) The high-pressure static area has strong replaceability.

[0046] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the orientation terms is generally based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present disclosure and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present disclosure; the orientation terms "inside" and "outside" refer to the inside and outside relative to the contour of each component itself.

[0047] For convenience of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used herein to describe the spatial positional relationship of one or more components or features shown in the drawings with respect to other components or features. It should be understood that the spatial relative terms include not only the orientation of the components described in the drawings but also different orientations in use or operation. For example, if the components in the drawings are inverted as a whole, then the component "above" or "over" other components or features will include the situation where the component is "below" or "under" other components or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". In addition, these components or features can also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document is intended to cover all such cases.

[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, components, assemblies and / or combinations thereof.

[0049] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein.

[0050] The present disclosure has been illustrated by the above embodiments. However, it should be understood that the above embodiments are only for illustrative and explanatory purposes, and are not intended to limit the present disclosure to the scope of the described embodiments. In addition, those skilled in the art can understand that the present disclosure is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present disclosure, and these variations and modifications all fall within the scope claimed by the present disclosure. The protection scope of the present disclosure is defined by the appended claims and their equivalent scope.

Claims

1. A fluid test platform, characterized in that, Comprising: An atmospheric pressure fluid region (10) for providing an atmospheric pressure fluid environment, the atmospheric pressure fluid region (10) including a test section (11); and A high-pressure static region (20) for providing a high-pressure environment, the high-pressure static region (20) including a high-pressure tank (21) and a telescopic member (22) disposed within the high-pressure tank (21); Wherein, the high-pressure tank (21) is detachably connected to the test section (11) by a flange to be in a connected state and a separated state relative to the atmospheric pressure fluid region (10), the flange including a fully enclosed flange and a permeable flange. When the flange is the fully enclosed flange, the high-pressure tank (21) is in a separated state relative to the atmospheric pressure fluid region (10), and when the flange is the permeable flange, the high-pressure tank (21) is in a connected state relative to the atmospheric pressure fluid region (10), and the telescopic member (22) can extend into the test section (11).

2. The fluid test platform according to claim 1, wherein The atmospheric pressure fluid region (10) further includes a water pump section (12), the test section (11) has a fluid inlet (111) and a fluid outlet (112), the water pump section (12) has a first end (121) and a second end (122), the first end (121) is connected to the fluid inlet (111), and the second end (122) is connected to the fluid outlet (112) to form a circulating atmospheric pressure fluid.

3. The fluid test platform according to claim 2, wherein, There is a stable section (13) and a contraction section (14) between the first end (121) and the fluid inlet (111). The stable section (13) has a steady flow inlet (131) and a steady flow outlet (132), and the cross-sectional area of the stable section (13) remains unchanged from the steady flow inlet (131) to the steady flow outlet (132). The contraction section (14) is connected between the steady flow outlet (132) and the fluid inlet (111), and the cross-sectional area of the contraction section (14) gradually decreases from the steady flow outlet (132) to the fluid inlet (111).

4. The fluid test platform according to claim 3, characterized in that, A steady flow member for reducing the turbulence intensity is disposed within the stable section (13).

5. The fluid test platform according to claim 3, characterized in that, The contraction section (14) has a length L, and the diameter of the steady flow outlet (132) is defined as D, L = (0.5 - 1) × D.

6. The fluid test platform according to claim 3, characterized in that, There is a transition section (15) between the steady flow inlet (131) and the first end (121). The transition section (15) has a transition inlet (151) and a transition outlet (152). The diameter of the transition outlet (152) is equal to the diameter of the steady flow inlet (131), and the diameter of the transition inlet (151) is equal to the diameter of the first end (121). And from the transition inlet (151) to the transition outlet (152), the cross-sectional area of the transition section (15) gradually increases.

7. The fluid test platform according to claim 6, characterized in that, There are also a first corner section (161) and a second corner section (162) between the steady flow inlet (131) and the transition outlet (152). Flow guiding vanes (18) are disposed within both the first corner section (161) and the second corner section (162).

8. The fluid test platform according to claim 2, characterized in that There is a diffusion section (17) between the fluid outlet (112) and the second end (122) for decelerating and diffusing the fluid flowing out of the fluid outlet (112). The diffusion section (17) has a diffusion inlet (171) and a diffusion outlet (172). The diameter of the diffusion inlet (171) is equal to the diameter of the fluid outlet (112), and the diameter of the diffusion outlet (172) is equal to the diameter of the second end (122). From the diffusion inlet (171) to the diffusion outlet (172), the cross-sectional area of the diffusion section (17) gradually increases.

9. The fluid test platform according to claim 8, characterized in that, There is also a third corner section (163) and a fourth corner section (164) between the diffusion outlet (172) and the second end (122). Flow guiding vanes (18) are arranged in both the third corner section (163) and the fourth corner section (164).

10. The fluid test platform according to claim 7 or 9, characterized in that, The flow guiding vane (18) includes an arc section (181) and a straight section (182). The straight sections (182) are respectively connected to both ends of the arc section (181).

Images