Active flow control structure and flow control method for deep-sea submersible

Abstract

The present invention relates to an active flow control structure and a flow control method for a deep-sea submersible. The method is based on an existing outboard heat exchange system of a deep-sea submersible, guides the seawater after heat exchange to the vicinity of a deflow surface and a stern elevator where the flow field is relatively turbulent through a guide pipe, and quantitatively controls the discharge rate on both sides of the deflow surface of the main body profile by a pipeline axial flow pump, thereby realizing active optimization of the flow field of the deep-sea submersible, improving the rudder effect, and thus meeting the stability and controllability requirements of the deep-sea submersible, which is of great significance to improving the underwater navigation and operation efficiency of the deep-sea submersible.

Description

Technical Field

[0001] The present invention relates to the technical field of flow field optimization for underwater navigation of deep-sea submersibles, and in particular to an active flow control structure and flow control method for deep-sea submersibles. Background Art

[0002] Both submarines and deep-sea manned submersibles are equipped with a cooling system. The traditional cooling system is to introduce seawater into the heat exchanger through a diversion port for heat exchange, and then discharge it through a drain port, or directly release the heat exchange seawater into the light outer shell.

[0003] Due to the constraints of pressure cabin layout, special carrying requirements, main scale displacement and other conditions, the hydrodynamic lines of deep-sea manned submersibles are quite different from the teardrop shape of submarines. Among them, the double stern (double main thrust) is one of the main deflow section lines used by deep-sea manned submersibles (hereinafter referred to as platforms). Although this line can meet the overall design requirements and ensure the maneuverability of the platform, it will increase the curvature amplitude of the stern of the platform. During navigation, it will inevitably bring a more turbulent flow field (turbulence and vortex) to the deflow surface of the main line, thereby causing the loss of rudder effect (elevator, rudder) at the stern of the platform, and then affecting the stability and controllability of the platform. Summary of the invention

[0004] In view of the shortcomings in the above-mentioned existing production technology, the applicant provides a rationally structured active flow control structure and flow control method for deep-sea submersibles, and carries out flow field optimization design for the complex flow removal surface of the platform, thereby ensuring the steering effect of the stern elevator, thereby improving the stability and controllability of the platform.

[0005] The technical solution adopted by the present invention is as follows:

[0006] An active flow control structure for a deep-sea submersible, which is built into the deep-sea submersible, comprises a heat exchanger; the inlet end of the heat exchanger is connected to a drainage pipe, and the outlet end of the heat exchanger is connected to a guide pipe.

[0007] The drainage port of the drainage pipe is set on the side of the deep-sea submersible.

[0008] The guide pipe is equipped with a pipeline axial flow pump, and a guide grid is arranged at the outlet of the guide pipe; the guide pipe is used to guide the seawater after heat exchange to the deflow surface - the tail elevator.

[0009] As a further improvement of the above technical solution:

[0010] The drainage pipe and the guide pipe are symmetrically arranged based on the heat exchanger.

[0011] The drainage tube and the flow guide tube are both set to a curve shape that fits the contour of the deep-sea submersible.

[0012] The arrangement height of the heat exchanger is consistent with the waterline height in the middle of the deep-sea submersible.

[0013] The object controlled by the pipeline axial flow pump is the discharge rate on the upper and lower sides of the outflow surface.

[0014] A flow control method using an active flow control structure for a deep-sea submersible comprises the following steps:

[0015] The seawater after heat exchange is guided to the turbulent flow field of the deflow surface - the stern elevator through the drainage pipe, heat exchanger and guide pipe. The discharge rate on the upper and lower sides of the deflow surface of the main body line is quantitatively controlled by the pipeline axial flow pump to achieve active optimization of the flow field of the deep-sea submersible.

[0016] As a further improvement of the above technical solution:

[0017] The pipeline axial flow pump is connected to the control motor; under normal underwater navigation conditions, the output power of the control motors on the upper and lower sides is set to be consistent to ensure the uniform speed of the two pipeline axial flow pumps, so that the water flow velocity through the drain outlet end of the heat exchanger-the guide pipes on both sides-the outlets on both sides is consistent, combined with the uniform diversion of the guide grilles on the upper and lower sides, it plays a role in stabilizing and optimizing the turbulent flow field of the platform stern deflow surface.

[0018] When the vessel becomes deeper underwater, that is, when sailing with the bow raised, the upper control motor is set to increase the output power and the speed of the upper pipeline axial flow pump is increased, so that the water flow velocity through the heat exchanger drain end-upper guide pipe-upper outlet is higher than the water flow velocity at the lower outlet.

[0019] When going deeper underwater, that is, under the condition of bow-buried navigation, the lower control motor is set to increase the output power and the speed of the lower pipeline axial flow pump is increased, so that the water flow velocity through the drain end of the heat exchanger-the lower guide pipe-the lower outlet is higher than that of the upper outlet.

[0020] The heat exchanger used for heating the seawater is the heat exchanger of the existing outboard heat exchange system of the deep-sea submersible.

[0021] The beneficial effects of the present invention are as follows:

[0022] In order to improve the stability and maneuverability of deep-sea manned submersibles, the present invention optimizes the flow field design for the complex deflow surface of the platform. The patent of the present invention proposes an active flow control method for deep-sea manned submersibles. Based on the existing outboard heat exchange system of the platform, seawater is introduced through the guide port for heat exchange, and then guided through a specific pipeline to the vicinity of the main body line deflow surface on the upper and lower sides of the rudder surface (taking the stern elevator as an example). The pipeline axial flow pump is used to quantitatively control the outflow rate on the upper and lower sides respectively, to achieve the flow field optimization based on the hydrodynamic line deflow surface of the platform itself, to ensure the rudder effect of the stern elevator, thereby improving the stability and maneuverability of the platform, which is of great significance for the development of deep-sea transportation and exploration equipment in my country.

[0023] The solution of the present invention can actively and quantitatively control the outflow rate and outflow volume according to the actual hydrodynamic requirements of various types of deep-sea submersibles, fully optimize the flow field environment of the main body profile to improve the rudder efficiency, and has a strong application value; it can meet the requirements of completing configuration and modification within a relatively small adjustment range, and can be expanded to be applied to rudders and elevators at various positions of model equipment, with a simple structure, reliable operation, and easy installation.

[0024] The device structure built into the deep-sea submersible has a flow guide port and an outlet port designed to fully match the surface of the model line and will not cause damage to the existing hydrodynamic line shape of the model equipment.

[0025] The device relies on the existing outboard heat exchange system of the deep-sea submersible. While achieving active flow control, it can also improve the overall heat exchange performance of the platform; at the same time, it can reduce the space occupied by the device itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a perspective view of the overall structure of the present invention, used to reflect the internal pipeline structure.

[0027] Figure 2 It is a cross-sectional view of the present invention, used to illustrate the relative positional relationship between the drainage tube and the flow guide tube.

[0028] Figure 3 for Figure 2 Schematic diagram of the specific structure of the orientation.

[0029] Figure 4 It is a schematic diagram of the flow control principle of the bow lifting condition of the present invention.

[0030] Figure 5 It is a schematic diagram of the flow control principle of the bow buried working condition of the present invention.

[0031] Among them: 1. drainage port; 2. drainage pipe; 3. heat exchanger; 4. guide pipe; 5. control motor; 6. pipeline axial flow pump; 7. outlet; 8. guide grille. DETAILED DESCRIPTION

[0032] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0033] like Figure 1-Figure 5 As shown, the active flow control structure for deep-sea submersibles of this embodiment is built into the submersible, and includes a heat exchanger 3; the inlet end of the heat exchanger 3 is connected to a drainage pipe 2, and the outlet end of the heat exchanger 3 is connected to a flow guide pipe 4.

[0034] The drainage port 1 of the drainage pipe 2 is arranged on the side of the deep-sea submersible.

[0035] The flow guide pipe 4 is equipped with a pipeline axial flow pump 6, and a flow guide grid 8 is arranged at the outlet 7 of the flow guide pipe 4; the flow guide pipe 4 is used to guide the seawater after heat exchange to the outflow surface - the tail elevator.

[0036] The flow guide pipe 2 and the flow guide pipe 4 are both symmetrically arranged with the heat exchanger 3 as a reference.

[0037] The drainage pipe 2 and the flow guide pipe 4 are both configured to be curved to fit the contour of the deep-sea submersible.

[0038] The arrangement height of the heat exchanger 3 is consistent with the waterline height in the middle of the submersible.

[0039] The object controlled by the pipeline axial flow pump 6 is the discharge rate on the upper and lower sides of the outflow surface.

[0040] The flow control method using the active flow control structure for deep-sea submersibles of this embodiment includes the following steps:

[0041] The seawater after heat exchange is guided to the turbulent flow field of the deflow surface - the stern elevator through the drainage pipe 2, the heat exchanger 3, and the guide pipe 4. The pipeline axial flow pump 6 quantitatively controls the discharge rate on the upper and lower sides of the deflow surface of the main body line, thereby realizing active optimization of the flow field of the deep-sea submersible.

[0042] The pipeline axial flow pump 6 is connected to the control motor 5; under normal underwater navigation conditions, the output power of the control motors 5 on the upper and lower sides is set to be consistent to ensure the uniform speed of the two pipeline axial flow pumps 6, so that the water flow velocity through the drainage end of the heat exchanger 3-the guide pipes 4 on both sides-the outlets 7 on both sides is consistent, combined with the uniform diversion of the guide grilles 8 on the upper and lower sides, it plays a role in stabilizing and optimizing the turbulent flow field of the stern deflow surface of the platform.

[0043] When the water depth increases, that is, when the bow is raised during navigation, the upper control motor 5 is set to increase the output power and the speed of the upper pipeline axial flow pump 6 is increased, so that the water flow velocity through the drainage end of the heat exchanger 3-the upper guide pipe 4-the upper outlet 7 is higher than the water flow velocity of the lower outlet 7.

[0044] When going deeper underwater, i.e. under the condition of bow-burying navigation, the lower control motor 5 is set to increase the output power and the rotation speed of the lower pipeline axial flow pump 6 is increased, so that the water flow velocity through the drainage end of the heat exchanger 3 - the lower guide pipe 4 - the lower outlet 7 is higher than that of the upper outlet 7.

[0045] The heat exchanger 3 used for heating the seawater is the heat exchanger 3 of the existing outboard heat exchange system of the submersible.

[0046] The specific structure and working principle of the present invention are as follows:

[0047] like Figure 1The figure shows a schematic diagram of the three-dimensional structure of the tail elevator of a deep-sea submersible. The submersible has a cylindrical shape, and a deflow surface is formed between the propellers on both sides. The discharge rates on the upper and lower sides of the deflow surface will affect the flow field near the submersible.

[0048] The purpose of the present invention is to use the existing structure in the deep-sea submersible to add components to form a complete flow control structure, and use this flow control structure to achieve quantitative control of the discharge rate on both sides of the deflow surface.

[0049] Combined with reference Figure 2 and Figure 3 , taking the heat exchanger as the installation reference, a drainage pipe and a guide pipe are respectively set at the inlet and outlet directions of the heat exchanger. Two drainage pipes and two guide pipes are set. The output directions of the guide pipe are respectively the upper and lower sides of the deflow surface, that is, the outlets of the guide pipe correspond to the upper and lower sides of the deflow surface. The drainage ports of the drainage pipe are respectively located on the left and right sides of the deep-sea submersible body, and the seawater at the side wall of the deep-sea submersible is introduced into the heat exchanger for heat exchange, and then the regulated flow field is output.

[0050] Each flow guide pipe is equipped with a pipeline axial flow pump, and each pipeline axial flow pump is equipped with a control motor located outside the flow guide pipe. Two control motors are fixedly installed inside the deep-sea submersible's side room. The seawater in the flow guide pipe is input from the heat exchanger, regulated by the pipeline axial flow pump, and then output from the deflow surface. The layout height of the heat exchanger is consistent with the waterline height in the middle of the deep-sea submersible, ensuring that the two flow guide pipes connected to the drain end of the heat exchanger are at the same distance from the outlets on both sides of the deflow surface at the stern of the deep-sea submersible.

[0051] The guide grilles are fixedly arranged near the upper and lower side outlets.

[0052] Under normal underwater navigation conditions, the output power of the control motors on the upper and lower sides is set to be consistent to ensure the uniform speed of the two pipeline axial flow pumps, so that the water flow velocity through the heat exchanger drain end-upper and lower side guide pipes-upper and lower side outlets is consistent. Combined with the uniform diversion of the upper and lower side guide grids, it plays a role in stabilizing and optimizing the turbulent flow field of the platform stern deflow surface.

[0053] like Figure 4 As shown in the figure, when the water goes deeper and deeper, that is, when the bow is lifted, the upper control motor is set to increase the output power and the speed of the upper pipeline axial flow pump is increased. Figure 4 In the middle position, the seawater flow in the upper guide pipe increases significantly, while the seawater flow in the lower guide pipe remains unchanged, so that the water flow velocity flowing through the drain outlet end of the heat exchanger, the upper guide pipe, and the upper outlet in sequence is higher than the water flow velocity of the lower outlet, which stabilizes and optimizes the turbulent flow field of the stern deflow surface of the platform, while cooperating with improving the rudder effect of the stern elevator and improving the underwater upward deepening control efficiency of the platform.

[0054] like Figure 5 As shown in the figure, when the vessel goes deeper underwater, i.e., under the condition of bow-buried navigation, the lower control motor is set to increase the output power and the speed of the axial flow pump in the lower pipeline. At this time, the seawater flow in the lower guide pipe increases significantly, while the seawater flow in the upper guide pipe remains unchanged, so that the water flow velocity flowing through the drainage end of the heat exchanger, the lower guide pipe and the lower outlet in sequence is higher than the water flow velocity of the upper outlet, which stabilizes and optimizes the turbulent flow field of the stern deflow surface of the platform, and at the same time improves the rudder effect of the stern elevator, thereby improving the control efficiency of the platform going deeper underwater.

[0055] The above-mentioned bow raising and bow burying state switching processes all start from adjusting the water flow velocity from the state of normal navigation conditions; if in special circumstances, such as switching directly from bow raising to bow burying, you can choose to adjust to the normal navigation state first, or you can directly adjust the two control motors at the same time to complete the flow switching in the two guide pipes to achieve the expected navigation state.

[0056] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. An active flow control structure for a deep-sea submersible, characterized in that: Built into the submersible, it comprises a heat exchanger (3); the inlet end of the heat exchanger (3) is connected to a drainage pipe (2), and the outlet end of the heat exchanger (3) is connected to a drainage pipe (4). The drainage port (1) of the drainage pipe (2) is arranged on the side of the deep-sea submersible. The flow guide pipe (4) is equipped with a pipeline axial flow pump (6), and a flow guide grid (8) is arranged at the outlet (7) of the flow guide pipe (4); the flow guide pipe (4) is used to guide the seawater after heat exchange to the deflow surface-tail elevator. When the vessel goes deeper underwater, i.e., when sailing with the bow lifted, the upper control motor (5) is set to increase the output power and the rotation speed of the upper pipeline axial flow pump (6) is increased, so that the flow rate of water through the water outlet end of the heat exchanger (3) - the upper guide pipe (4) - the upper outlet (7) is higher than the flow rate of water at the lower outlet (7). When the vessel goes deeper underwater, i.e., under the condition of bow-buried navigation, the lower control motor (5) is set to increase the output power and the rotation speed of the lower pipeline axial flow pump (6) is increased, so that the flow velocity of the water through the water outlet end of the heat exchanger (3) - the lower guide pipe (4) - the lower outlet (7) is higher than that of the upper outlet (7). The process of switching between bow raising and bow burying states includes the following methods: Adjust the water flow rate from the normal sailing conditions. When switching directly from raising the bow to burying the bow, first adjust to the normal navigation state, or directly adjust the two control motors at the same time to complete the flow switching in the two guide pipes.

2. The active flow control structure for a deep-sea submersible according to claim 1, characterized in that: The drainage pipe (2) and the flow guide pipe (4) are both symmetrically arranged with the heat exchanger (3) as a reference.

3. The active flow control structure for a deep-sea submersible according to claim 1, characterized in that: The drainage tube (2) and the flow guide tube (4) are both arranged in a curved shape that fits the contour of the deep-sea submersible.

4. The active flow control structure for a deep-sea submersible according to claim 1, characterized in that: The arrangement height of the heat exchanger (3) is consistent with the waterline height in the middle of the deep-sea submersible.

5. The active flow control structure for deep-sea submersible according to claim 1, characterized in that: The object controlled by the pipeline axial flow pump (6) is the discharge rate on the upper and lower sides of the outflow surface.

6. A flow control method using the active flow control structure for a deep-sea submersible as claimed in claim 1, characterized in that: The steps include: The seawater after heat exchange is guided to the deflow surface with turbulent flow field - the stern elevator through the drainage pipe (2), the heat exchanger (3) and the guide pipe (4), and the discharge rate on the upper and lower sides of the deflow surface of the main body line is quantitatively controlled by the pipeline axial flow pump (6), so as to realize active optimization of the flow field of the deep-sea submersible.

7. The flow control method according to claim 6, characterized in that: The pipeline axial flow pump (6) is connected to the control motor (5); under normal underwater navigation conditions, the output power of the control motors (5) on the upper and lower sides is set to be consistent, ensuring that the speeds of the two pipeline axial flow pumps (6) are uniform, so that the flow speed of water passing through the drainage end of the heat exchanger (3) - the guide pipes (4) on both sides - the outlets (7) on both sides is consistent, and combined with the uniform flow distribution of the guide grilles (8) on the upper and lower sides, it plays a role in stabilizing and optimizing the turbulent flow field of the stern deflow surface of the platform.

8. The flow control method according to claim 6 or 7, characterized in that: The heat exchanger (3) used for heating seawater is a heat exchanger (3) of an existing outboard heat exchange system of the submersible.

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