Supercavitation navigation body water tunnel test high-temperature air supply system and operation method

Abstract

The invention relates to a supercavitation navigation body water tunnel test high-temperature air supply system and an operation method, the supercavitation navigation body water tunnel test high-temperature air supply system comprises an air source supply processing device, the output end of the air source supply processing device is connected in series with a first-stage pressure reducing valve and a second-stage pressure reducing valve through a pipeline, the output end of the second-stage pressure reducing valve is connected with a buffer air cylinder, and the top of the buffer air cylinder is provided with a safety valve; the output end of the buffer gas cylinder is divided into two paths, one path is connected with an electric heater through a mass flow controller and a first one-way valve, and the other path is communicated with a three-way pneumatic electromagnetic valve through a gas tank pressure reducing valve; the output end of the electric heater is further communicated with a three-way pneumatic electromagnetic valve through a check valve, the three-way pneumatic electromagnetic valve is divided into two branches again, one branch is communicated with an outlet water tank through a second one-way valve, and the other branch is communicated with a test water tunnel outlet pipeline through a third one-way valve. The water tunnel test of air source state adjustment can be completed in a high temperature range of 0-600 DEG C, and the use requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of air supply systems, and in particular to a high-temperature air supply system for a supercavitation vehicle water tunnel test and an operating method thereof. Background Art

[0002] In supercavitation water tunnel tests, artificial ventilation of the vehicle model is often required. Common air supply methods include gas generator production and external pipeline supply to the model. However, the effective air supply time of the gas generator in water tunnel tests is too short, making it impossible to directly simulate the high ventilation temperatures of smaller scale models. External pipeline supply usually uses compressed air as the ventilation gas source, which has significant heat losses along the pipeline and presents certain difficulties in controlling gas flow and temperature. In order to enable high-temperature gas source ventilation testing in water tunnel tests, it is necessary to develop a water tunnel test air supply device suitable for water tunnel testing that can adjust the gas source state within the high temperature range of 0 to 600°C. Summary of the Invention

[0003] In response to the shortcomings of the above-mentioned existing production technology, the applicant provides a high-temperature air supply system and operation method for supercavitation vehicle water tunnel testing, so that it can complete water tunnel testing with air source state adjustment within a high temperature range of 0 to 600°C to meet usage requirements.

[0004] The technical solutions adopted in the present invention are as follows:

[0005] A high-temperature air supply system for a supercavitation vehicle water tunnel test comprises an air source supply processing device, wherein the output end of the air source supply processing device is connected in series with a first-stage pressure reducing valve and a second-stage pressure reducing valve through a pipeline, the output end of the second-stage pressure reducing valve is connected to a buffer gas cylinder, a safety valve is installed on the top of the buffer gas cylinder, and the output end of the buffer gas cylinder is divided into two paths, one path is connected to an electric heater through a mass flow controller and a No. 1 one-way valve, and the other path is connected to a three-way pneumatic solenoid valve through a gas tank pressure reducing valve; the output end of the electric heater is also connected to the three-way pneumatic solenoid valve through a check valve, and the three-way pneumatic solenoid valve is further divided into two branches, one branch is connected to an outlet water tank through a No. 2 one-way valve, and the other branch is connected to the test water tunnel outlet pipe through a No. 3 one-way valve.

[0006] Its further technical solution is:

[0007] The structure of the air source supply processing device is as follows: it includes an air compressor, an air storage tank is installed at the output end of the air compressor, the output end of the air storage tank is connected to a cold dryer through a pressure pipe, and the output end of the cold dryer is connected to a first-level pressure reducing valve.

[0008] A No. 1 pressure sensor and a filter are installed on the pressure pipe.

[0009] The second pressure sensor is arranged on the pipeline between the primary pressure reducing valve and the secondary pressure reducing valve.

[0010] The third pressure sensor is installed on the pipeline between the mass flow controller and the first one-way valve.

[0011] The first temperature sensor and the fourth pressure sensor are installed on the pipeline between the check valve and the three-way pneumatic electromagnetic valve.

[0012] The fifth pressure sensor and the second temperature sensor are installed on the pipeline between the third one-way valve and the test water tunnel outlet pipeline.

[0013] An operating method of a high-temperature gas supply system of a water tunnel test of a supercavitation vehicle, comprising the following operating procedures:

[0014] Step 1: Start the air compressor to charge the gas tank, and when the pressure of the gas tank reaches 20 MPa, the air compressor automatically stops working, and the gas is output after being dried and cleaned by the filter and the cold dryer;

[0015] Step 2: The high-pressure clean dry air obtained from the gas source supply treatment device is reduced to 8 MPa by the primary pressure reducing valve, and then the outlet pressure of the secondary pressure reducing valve is adjusted according to the required test pressure value, and is stored in the buffer gas cylinder;

[0016] Step 3: The high-pressure clean dry air is introduced from the buffer gas cylinder and enters the electric heater;

[0017] Step 4: Before the test, the electric heater is started to preheat, and after the preset value is monitored by the temperature sensor, the three-way pneumatic electromagnetic valve is adjusted to open the gas path to the outlet water tank for preheating and aeration;

[0018] Step 5: After preheating is completed, the three-way pneumatic electromagnetic valve is adjusted to close the outlet water tank and open the test water tunnel outlet pipeline to the test water tunnel;

[0019] Step 6: After the test is completed, the test water tunnel outlet pipeline is closed, the outlet water tank is opened, the electric heater is powered off, and the electric heater is cooled.

[0020] Further technical solutions of the present application are as follows:

[0021] In step 3, the air passes through the mass flow controller and the third pressure sensor, and is adjusted to the required pressure and flow value during the test process and then enters the electric heater, the pressure adjustment range is 0.2 MPa-1 MPa, the flow adjustment range is 0-10 g / s, and the temperature range is normal temperature-600℃.

[0022] The beneficial effects of the present application are as follows:

[0023] The application can realize the fast independent adjustment of the gas temperature and flow in the temperature range of 0-600 DEG C at the outlet of the test bed, and adopts the corresponding control strategy (the parameters such as the rise time, overshoot and flow stabilization time of the flow control are comprehensively considered), and the closed loop PID control of the flow and temperature is carried out to ensure the test environment of constant temperature, high pressure and long time gas supply.

[0024] The application can effectively realize the preheating and switching of the ventilation pipeline in the short time test environment (30-60s) of the water tunnel, meet the demand of the stable supply of the high temperature gas source in the test, and prevent the backflow from damaging the equipment by installing multiple check valves.

[0025] The application can provide the constant temperature high pressure and large atmospheric quantity stable gas source in the range of 0-600 DEG C in the test, and the heat loss in the gas transportation process can be obviously reduced by the pipeline heat preservation measures, so that the hot ventilation test research under different temperatures is facilitated.

[0026] The application is suitable for the test device for carrying out the test in the water tunnel laboratory or similar conditions, and the device can realize the high temperature ventilation supply demand of the manned supercavitation water tunnel test of the navigation body. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the application.

[0028] Figure 2 It is a structural schematic diagram of the gas source supply processing system of the application.

[0029] Figure 3 It is a whole structural schematic diagram of the gas source supply processing system of the application.

[0030] Figure 4 It is a principle diagram of the measurement and control system of the application.

[0031] 1, air compressor; 2, gas storage tank; 3, first pressure sensor; 4, filter; 5, cold dryer; 6, first stage pressure reducing valve; 7, second pressure sensor; 8, second stage pressure reducing valve; 9, safety valve; 10, buffer gas cylinder; 11, mass flow controller; 12, third pressure sensor; 13, first check valve; 14, gas tank pressure reducing valve; 15, three-way pneumatic electromagnetic valve; 16, electric heater; 17, check valve; 18, first temperature sensor; 19, fourth pressure sensor; 20, third check valve; 21, fifth pressure sensor; 22, second temperature sensor; 23, test water tunnel outlet pipeline; 24, second check valve; 25, outlet water tank. DETAILED DESCRIPTION

[0032] The specific embodiment of the application will be described below in combination with the drawings.

[0033] As Figures 1-4As shown, the high-temperature air supply system of the supercavitation vehicle water tunnel test of the embodiment comprises an air source supply processing device, the output end of the air source supply processing device is connected in series with a first pressure reducing valve 6 and a second pressure reducing valve 8 through a pipeline, the output end of the second pressure reducing valve 8 is connected with a buffer gas cylinder 10, a safety valve 9 is installed on the top of the buffer gas cylinder 10, the output end of the buffer gas cylinder 10 is divided into two paths, one path is connected with an electric heater 16 through a mass flow controller 11 and a first check valve 13, the other path is connected with a three-way pneumatic electromagnetic valve 15 through a gas tank pressure reducing valve 14; the output end of the electric heater 16 is also connected with the three-way pneumatic electromagnetic valve 15 through a check valve 17, the three-way pneumatic electromagnetic valve 15 is again divided into two branches, one branch is connected with an outlet water tank 25 through a second check valve 24, the other branch is connected with a test water tunnel outlet pipeline 23 through a third check valve 20.

[0034] The structure of the air source supply processing device is that it comprises an air compressor 1, the output end of the air compressor 1 is installed with a gas storage tank 2, the output end of the gas storage tank 2 is connected with a cold dryer 5 through a pressure pipe, and the output end of the cold dryer 5 is connected with the first pressure reducing valve 6.

[0035] A first pressure sensor 3 and a filter 4 are installed on the pressure pipe.

[0036] A second pressure sensor 7 is arranged on the pipeline between the first pressure reducing valve 6 and the second pressure reducing valve 8.

[0037] A third pressure sensor 12 is installed on the pipeline between the mass flow controller 11 and the first check valve 13.

[0038] A first temperature sensor 18 and a fourth pressure sensor 19 are installed on the pipeline between the check valve 17 and the three-way pneumatic electromagnetic valve 15 at intervals.

[0039] A fifth pressure sensor 21 and a second temperature sensor 22 are installed on the pipeline between the third check valve 20 and the test water tunnel outlet pipeline 23.

[0040] The operation method of the high-temperature air supply system of the supercavitation vehicle water tunnel test of the embodiment comprises the following operation process:

[0041] First step: start the air compressor 1 to charge the gas storage tank 2, when the pressure of the gas storage tank 2 reaches 20 MPa, the air compressor 1 automatically stops working, and the gas is output after being dried and cleaned through the filter 4 and the cold dryer 5;

[0042] Second step: the high-pressure clean and dry air obtained from the air source supply processing device is reduced to 8 MPa through the first pressure reducing valve 6, then the outlet pressure of the second pressure reducing valve 8 is adjusted according to the required test pressure value, and stored in the buffer gas cylinder 10;

[0043] Third step: high pressure clean dry air is led out from the buffer gas cylinder 10 and enters the electric heater 16;

[0044] Fourth step: before the test, the electric heater 16 is started to preheat, and after the preset value is monitored by the temperature sensor, the three-way pneumatic electromagnetic valve 15 is adjusted to open the gas path to the outlet sink 25 for preheating ventilation;

[0045] Fifth step: after preheating is completed, the three-way pneumatic electromagnetic valve 15 is adjusted to close the channel of the outlet sink 25, and the test water hole outlet pipeline 23 leading to the test water hole is opened;

[0046] Sixth step: after the test is completed, the test water hole outlet pipeline 23 is closed, the outlet sink 25 can be opened, the electric heater 16 is powered off, and the electric heater 16 can be cooled.

[0047] In the third step, the air passes through the mass flow controller 11 and the third pressure sensor 12, and is adjusted to the required pressure and flow value during the test process and then enters the electric heater 16, the pressure adjustment range is 0.2MPa-1MPa, the flow adjustment range is 0-10g / s, and the temperature range is normal temperature-600℃.

[0048] The specific structure and function of the high-temperature gas supply system for the supercavitation vehicle water tunnel test according to the application are as follows:

[0049] The application is a test device system for generating and stably supplying high-temperature gas in a water tunnel, mainly comprising a gas source supply and treatment device, a pressure and flow adjustment device, a gas heater and a system control and auxiliary system, wherein the gas source supply and treatment device can produce high-pressure pure gas and store it in a gas cylinder, in order to prevent the influence of gas compression and expansion on temperature, the gas is first adjusted to the required pressure value by the pressure and flow adjustment device, and then heated by the heater and output from the external interface, and the pressure and flow adjustment device and the heater are independently adjusted in real time for temperature and gas flow during the test through the control and auxiliary system.

[0050] The working process of the system is as follows:

[0051] (I) When working, first start the air compressor 1 to charge the gas tank 2, when the pressure of the gas cylinder reaches 20MPa, the air compressor 1 automatically stops working, and the gas is output after being dried and cleaned by the filter 4 and the cold dryer 5;

[0052] (II) The high-pressure clean dry air obtained from the gas source supply and treatment device is reduced to about 8MPa (monitored by the second pressure sensor 7) through the first pressure reducing valve 6, and then the outlet pressure of the second pressure reducing valve 8 is adjusted according to the required pressure value (the pressure range in the test is about 0-1.7MPa) to store in the buffer gas cylinder 10;

[0053] (Three) high pressure clean dry air from the buffer cylinder 10, through the mass flow controller 11 and the third pressure sensor 12, adjust the pressure and flow required for the test process into the electric heater 16, pressure regulating range is 0.2MPa ~ 1MPa, flow regulating range is 0 ~ 10g / s, temperature range is room temperature ~ 600℃.

[0054] (Four) before the test, the electric heater 16 first start preheating, through the first temperature sensor 18 to reach the preset value after monitoring, adjust the three way pneumatic solenoid valve 15 open gas to the outlet sink 25 of the gas path for preheating ventilation, adjust the system temperature and flow, to ensure the response speed, three way pneumatic solenoid valve 15 is a pneumatic valve, from the buffer cylinder 10 alone gas path through the gas tank pressure reducing valve 14 drive.

[0055] (Five) observation of the first temperature sensor 18 and the fourth pressure sensor 19, the pipeline gas temperature and pressure stability, namely the preheating is completed, adjust the three way pneumatic solenoid valve 15 close the outlet sink 25 channel, open the test water hole outlet pipeline 23 to the test water hole, after the stable five pressure sensor 21 and the second temperature sensor 22 of the number is the final output gas parameters of the gas charging system. Control mass flow controller 11 can carry on the closed loop regulation control to the gas flow in the pipeline system, at the same time control the heater work, according to the set temperature value, carry on the heating of air, and according to the real time feedback temperature value of the second temperature sensor 22, carry on the fine adjustment to the front end temperature of the product; finally realize the independent adjustment of the system to the temperature, flow, meet the system to the temperature and flow, pressure demand.

[0056] (Six) after the test, the test water hole outlet pipeline 23 is closed, the outlet sink 25 can be opened, the heater can be powered off, the heater can be cooled down; the whole system is configured with multiple check valve and check valve 17, which can effectively prevent the water backfill damage to the instrument caused by pressure mutation and other factors during the water hole test gas supply.

[0057] The internal board card of the industrial computer sends command signals, which are output after signal conditioning by the signal conditioning module. The signals are transmitted by cable to drive the controlled object, so that the controlled object works according to the command signals. The detection signals of the sensor are collected by the industrial computer after signal conditioning. At the same time, the state of the heater is controlled through bus communication. All sensor signals are displayed in real time on the display screen in the form of charts for immediate observation, judgment and saving by the operator. All pressure, flow and temperature parameters in the test are collected and controlled by the system.

[0058] The present application aims at the demand of high temperature gas supply in water tunnel test. Firstly, a large capacity gas source is needed to ensure the stability of gas supply for a long time during the test. Secondly, the test is carried out in the water tunnel environment, and the heat loss along the gas pipeline needs to be reduced to ensure the temperature adjustment range. During the test, it is also necessary to prevent backflow damage to the instrument caused by pressure change. In order to improve the test efficiency, the gas needs to be preheated before being supplied to the test model.

[0059] The present application is a solution to the above background technical problems, that is, a test device system for generating and stably supplying high temperature gas in a water tunnel. The system is composed of a gas source supply and processing device, a pressure and flow regulating device, a gas heater and a system control and auxiliary system.

[0060] The gas source supply and processing device outputs high pressure pure gas stored in a gas cylinder. In order to prevent the influence of gas compression expansion on temperature, the gas is first adjusted to the required pressure value by the pressure and flow regulating device, and then heated by the heater before being discharged from the external interface. During the test, the pressure and flow regulating device and the heater are independently adjusted in real time by the control and auxiliary system.

[0061] The above description is an explanation of the present application, not a limitation of the invention. The scope of the present application is defined in the claims, and any modification within the scope of the present application can be made.

Claims

1. A high-temperature air supply system for supercavitating vehicle water tunnel testing, characterized by: The invention comprises an air source supply processing device, wherein the output end of the air source supply processing device is connected in series with a first-stage pressure reducing valve (6) and a second-stage pressure reducing valve (8) through a pipeline, the output end of the second-stage pressure reducing valve (8) is connected to a buffer gas cylinder (10), the top of the buffer gas cylinder (10) is provided with a safety valve (9), the output end of the buffer gas cylinder (10) is divided into two paths, one path is connected to an electric heater (16) through a mass flow controller (11) and a No. 1 one-way valve (13), and the other path is connected to a three-way pneumatic solenoid valve (15) through a gas tank pressure reducing valve (14); the output end of the electric heater (16) is also connected to the three-way pneumatic solenoid valve (15) through a check valve (17), and the three-way pneumatic solenoid valve (15) is further divided into two branches, one branch is connected to an outlet water tank (25) through a No. 2 one-way valve (24), and the other branch is connected to a test water tunnel outlet pipe (23) through a No. 3 one-way valve (20).

2. A high-temperature air supply system for supercavitating vehicle water tunnel testing according to claim 1, characterized in that: The structure of the gas source supply processing device is as follows: it includes an air compressor (1), the output end of the air compressor (1) is equipped with an air storage tank (2), the output end of the air storage tank (2) is connected to a cold dryer (5) through a pressure pipe, and the output end of the cold dryer (5) is connected to a first-stage pressure reducing valve (6).

3. A high-temperature air supply system for supercavitating vehicle water tunnel testing according to claim 2, characterized in that: A No. 1 pressure sensor (3) and a filter (4) are installed on the pressure pipe.

4. The high-temperature air supply system for supercavitating vehicle water tunnel testing according to claim 1, characterized in that: A second pressure sensor (7) is arranged on the pipeline between the first pressure reducing valve (6) and the second pressure reducing valve (8).

5. The high-temperature air supply system for supercavitating vehicle water tunnel testing according to claim 1, characterized in that: A No. 3 pressure sensor (12) is installed on the pipeline between the mass flow controller (11) and the No. 1 one-way valve (13).

6. The high-temperature air supply system for supercavitating vehicle water tunnel testing according to claim 1, characterized in that: A first temperature sensor (18) and a fourth pressure sensor (19) are installed at intervals on the pipeline between the check valve (17) and the three-way pneumatic solenoid valve (15).

7. The high-temperature air supply system for supercavitating vehicle water tunnel testing according to claim 1, characterized in that: A No. 5 pressure sensor (21) and a No. 2 temperature sensor (22) are installed on the pipeline between the No. 3 one-way valve (20) and the test water tunnel outlet pipeline (23).

8. A method for operating a high-temperature air supply system for a supercavitating vehicle water tunnel test according to claim 3, characterized in that: The following operating procedures are included: The first step is to start the air compressor (1) to inflate the gas storage tank (2). When the pressure of the gas storage tank (2) reaches 20 MPa, the air compressor (1) automatically stops working, and the gas passes through the filter (4) and the cold dryer (5) for drying and cleaning before being output; Step 2: The high-pressure clean dry air obtained from the gas source supply processing device is reduced to 8 MPa through the first-stage pressure reducing valve (6), and then the outlet pressure of the second-stage pressure reducing valve (8) is adjusted according to the pressure value required for the test and stored in the buffer gas cylinder (10); The third step is to draw high-pressure clean dry air from the buffer gas cylinder (10) and enter the electric heater (16); Step 4: Before the test, the electric heater (16) is started to preheat. After the temperature reaches the preset value through the temperature sensor, the three-way pneumatic solenoid valve (15) is adjusted to open the gas path to the outlet water tank (25) for preheating ventilation; Step 5: After preheating is completed, adjust the three-way pneumatic solenoid valve (15), close the channel of the outlet water tank (25), and open the test water tunnel outlet pipe (23) leading to the test water tunnel; Step 6: After the test is completed, the test water tunnel outlet pipe (23) is closed, the outlet water tank (25) is opened, the electric heater (16) is powered off, and the electric heater (16) is cooled.

9. The method for operating a high-temperature air supply system for a supercavitating vehicle water tunnel test according to claim 8, characterized in that: In the third step, the air passes through the mass flow controller (11) and the No. 3 pressure sensor (12), and is adjusted to the pressure and flow values ​​required for the test process before entering the electric heater (16). The pressure adjustment range is 0.2MPa to 1MPa, the flow adjustment range is 0 to 10g / s, and the temperature range is room temperature to 600°C.

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