CN103592961B - The kerosene oil flow control device of Supersonic combustion tests - Google Patents

Abstract

The invention discloses a kerosene flow control device for a supersonic combustion test, comprising: a control unit, a flow meter, a supersonic combustion chamber, a kerosene transportation pipeline, a flow regulating valve and a regulating unit. The kerosene flow in the cooling channel, and send the kerosene flow information to the control unit; the control unit controls the flow regulating valve through the adjustment unit according to the received kerosene flow information, and adjusts the kerosene input to the supersonic combustion chamber for combustion traffic. The present invention can make real-time adjustments to the continuous change of the cooling kerosene flow in the supersonic combustion test using kerosene active cooling, so that in the long-term supersonic combustion test, the kerosene flow remains stable all the time, so that the supersonic combustion chamber can be guaranteed The overall temperature is within a safe range to avoid danger.

Description

Kerosene Flow Control Device for Supersonic Combustion Test

technical field

The invention relates to the field of supersonic combustion tests, in particular to a kerosene flow control device used in supersonic combustion tests for active cooling of kerosene.

Background technique

In the supersonic combustion test, various gases and liquids (mainly air, hydrogen, oxygen, nitrogen, ethylene, aviation kerosene, etc.) need to be transported through pipelines with a certain flow ratio and accurate arrival time in the combustion chamber to complete the ignition, combustion and The process of doing work. In the experiment, hydrogen and oxygen are usually ignited at the first confluence to produce a high temperature (temperature greater than 1200 degrees Celsius), high pressure (pressure higher than 1MPa) gas, and this high temperature, high pressure gas passes through a Laval nozzle to generate supersonic flow (Mach The number is greater than 2), and then the supersonic airflow enters the combustion chamber, injects kerosene into the combustion chamber, ignites, and burns. This is the general process of the supersonic combustion test.

In this process, the total temperature of the airflow after the kerosene is ignited and burned in the combustion chamber can reach more than 2500°C. Under such high temperature conditions, it is necessary to cool the components constituting the combustion chamber. At present, the best cooling method is to use the built-in hydrocarbon fuel (usually aviation kerosene with high heat sink) for cooling, so that the temperature of the combustion chamber decreases and the temperature of the fuel increases, and then the high-temperature fuel is injected into the combustion chamber for combustion to form a In the closed-loop process, the combustion efficiency of high-temperature fuel is much higher than that of normal-temperature fuel. This is supersonic combustion with kerosene closed-loop active cooling. The advantage of this is that there is no need to carry other coolants during the flight of the aircraft, that is, through closed-loop active cooling, and to protect the safe operation of the supersonic combustion chamber, it can also effectively improve the combustion efficiency of fuel.

As shown in Figure 1, it is a schematic diagram of a closed-loop supersonic combustion chamber actively cooled by kerosene. It can be seen from the figure that the cooling kerosene is divided into 4 channels to cool the 4 combustion chamber panels and then converge together, and then sprayed into the combustion chamber for combustion.

Contents of the invention

The technical problem to be solved by the present invention is that because there is no flow control or adjustment device in the cooling structure of the combustion chamber, the temperature of the kerosene may gradually rise, the density will decrease, the pressure will increase, and the flow rate will decrease, resulting in a decrease in the cooling capacity of the combustion. , the temperature of the combustion chamber rises, which is prone to dangerous problems. A kerosene flow control device applied to the supersonic combustion test of kerosene active cooling is proposed, so that the flow of cooling kerosene in the supersonic combustion test remains stable.

In order to solve the above problems, the present invention provides a kerosene flow control device for a supersonic combustion test, including: a control unit, a flow meter, a supersonic combustion chamber, a kerosene transportation pipeline, a flow regulating valve and a regulating unit, wherein the control units are respectively It is connected with the flow meter and the regulating unit, and the regulating unit is connected with the flow regulating valve, and the flow meter and the flow regulating valve are both located on the kerosene transportation pipeline; the supersonic combustion chamber is connected with the kerosene transportation pipeline connected;

The flow meter detects the kerosene flow input to the cooling channel of the supersonic combustion chamber in real time, and sends the kerosene flow information to the control unit; the control unit controls the flow regulating valve through the adjustment unit according to the received kerosene flow information , to adjust the flow rate of kerosene input to the supersonic combustor for combustion.

Preferably, the regulating unit includes a motor controller, a motor and a coupling connected in sequence, wherein the motor controller is connected to the control unit, and the coupling is connected to the valve stem of the flow regulating valve The motor controller adjusts the running direction and speed of the motor according to the control of the control unit; the motor drives the flow regulating valve through the coupling to perform switching operations at different speeds.

Preferably, when the kerosene flow in the kerosene transportation pipeline decreases, the kerosene flow signal of the flow meter monitored by the control unit decreases, and the flow regulating valve is controlled by the regulating unit to open the valve;

When the kerosene flow in the kerosene transportation pipeline increases, the kerosene flow signal of the flow meter monitored by the control unit increases, and the flow regulating valve is controlled by the regulating unit to close the valve.

Preferably, when the kerosene flow rate in the kerosene transportation pipeline decreases, the control unit controls the flow regulating valve to open the valve through the adjustment unit, and the opening speed per unit area of the valve is equal to the density reduction speed of the kerosene, so that the flow through The kerosene flow increased by opening the large valve is equal to the kerosene flow loss caused by the decrease of kerosene density, so as to keep the kerosene flow constant during the control process;

When the kerosene flow rate in the kerosene transportation pipeline increases, the control unit controls the flow regulating valve to close the valve through the regulating unit, and the closing speed per unit area of the valve is equal to the increasing speed of the kerosene density, so that by closing the small The kerosene flow reduced by the valve is equal to the increase in kerosene flow caused by the increase in kerosene density, thereby keeping the kerosene flow constant during the control process.

The present invention can make real-time adjustments to the continuous change of the cooling kerosene flow in the supersonic combustion test using kerosene active cooling, so that in the long-term supersonic combustion test, the kerosene flow remains stable all the time, so that the supersonic combustion chamber can be guaranteed The overall temperature is within a safe range to avoid danger.

Description of drawings

Fig. 1 is a schematic diagram of a supersonic combustor using closed-loop active cooling in the prior art;

Fig. 2 is a schematic diagram of throat flow;

Figure 3 is a typical temperature rise curve without flow control;

Figure 4 is a typical flow rate drop curve without flow control;

5 is a schematic diagram of a kerosene flow control device for a supersonic combustion test according to an embodiment of the present invention;

Fig. 6 is the schematic diagram of the kerosene flow control device of the supersonic combustion test of the application example of the present invention;

Fig. 7 is a comparison chart of the flow curves with and without the control device added in the supersonic combustion test.

detailed description

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

In the closed-loop supersonic combustion test using kerosene active cooling, the cooling oil circuit is running in the combustion chamber. As the oil temperature continues to rise, the kerosene density decreases and the oil pressure increases, which will cause the kerosene flow rate to decrease. In this way, among several parallel cooling channels, if the oil temperature of one channel starts to rise first, the pressure increases and the flow rate decreases, which will increase the flow rate of the other channels, and the further decrease in flow rate will make the cooling of this channel insufficient, and the oil temperature will rise further. , the flow rate drops further, forming a positive feedback system, which causes the cooling panel to be burned due to too low flow rate.

In the supersonic combustion test operation, in order to ensure that the hot kerosene after cooling has a greater penetration depth when it is injected into the combustion chamber for combustion, the injection pressure needs to be relatively high. In order to obtain a larger injection pressure, it is necessary to install a Laval supersonic nozzle flowmeter at the end of the cooling channel to produce a throat throttling effect, thereby increasing the injection pressure. The position of the nozzle in the cooling channel is as follows: Figure 1 shows. Another advantage of using the nozzle is that it can increase the pressure of the kerosene in the cooling channel, so as to avoid the cooling effect being deteriorated due to the gaseous state of the kerosene when the pressure is too low.

For the analysis of the "throat" in the kerosene cooling channel - the sonic nozzle flowmeter, as shown in Figure 2, the kerosene flow rate is

Q=ρuA(1)

The above parameters are throat parameters.

During the experiment, the flow rate changes as

$\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; Q</span>}}\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; Q</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; \&rho;</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; u</span>}}\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; u</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; A</span>}}\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; A</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

During the experimental run, the throat area remains unchanged, that is,

$\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; A</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span>$

For the sonic nozzle flowmeter, the flow rate is basically determined by the pressure difference between the upstream and downstream. In the experiment, the pressure difference between upstream and downstream is basically kept constant, so the flow rate is also kept constant, that is

$\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; u</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 4</span>}<span\; class="notranslate">\; )</span>$

In the experiment, as the experiment progresses, the temperature of kerosene increases, so that the density decreases, that is

$\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; \&rho;</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; <</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 5</span>}<span\; class="notranslate">\; )</span>$

Therefore, it can be concluded that during the experiment, as the temperature of kerosene increases, the flow rate decreases, that is

$\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; Q</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; <</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span>$

As shown in Figure 3 and Figure 4, the temperature and flow curves of the upper panel of the combustion chamber in a typical experiment without flow control can be seen from the figure, as time goes by, the temperature of kerosene is rising rapidly , the highest rose to above 400 degrees Celsius, while the flow rate dropped from the initial 80g/s to below 40g/s.

The reduction of the kerosene flow reduces the cooling capacity of the combustion chamber, the temperature of the combustion chamber rises, and the kerosene temperature further increases, resulting in a further decrease of the kerosene flow, which will form a positive feedback, and finally cause the combustion chamber to be too high and Dangerous situation of burning.

According to the above analysis, in order to be able to adjust the kerosene flow in the pipeline, it is necessary to adjust the throat area or diameter in the pipeline. Therefore, here, the original Laval nozzle is changed into a flow regulating valve, which can play the role of a throat that can adjust the throat area, and then develop a system for this regulating valve, forming a set of supersonic Kerosene flow control device for combustion tests.

As shown in Figure 5, it is a schematic diagram of a kerosene flow control device, which includes: a control unit, a flow meter, a supersonic combustion chamber, a kerosene transportation pipeline, a flow regulating valve and a regulating unit, wherein the control unit is connected to the The flow meter is connected to the regulating unit, and the regulating unit is connected to the flow regulating valve, and both the flow meter and the flow regulating valve are located on the kerosene transportation pipeline; the supersonic combustion chamber is connected to the kerosene transportation pipeline; the flow rate The meter detects the kerosene flow input to the cooling channel of the supersonic combustion chamber in real time, and sends the kerosene flow information to the control unit; the control unit controls the flow regulating valve through the adjustment unit according to the received kerosene flow information, and adjusts the flow rate input to the control unit. The flow rate of kerosene combusted in the supersonic combustor.

When the kerosene flow in the kerosene transportation pipeline decreases, the kerosene flow signal of the flow meter monitored by the control unit decreases, and the flow regulating valve is controlled by the regulating unit to open the valve;

When the kerosene flow in the kerosene transportation pipeline increases, the kerosene flow signal of the flow meter monitored by the control unit increases, and the flow regulating valve is controlled by the regulating unit to close the valve.

As shown in Fig. 6, it is a schematic diagram of an application example of a kerosene flow control device, wherein the control unit is a control computer 11, and the adjustment unit includes a motor controller 9, a motor 7 and a coupling 6 connected in sequence. The flow regulating valve is a high temperature flow regulating valve 5 . After the kerosene 1 is transported through the kerosene transportation pipeline 2, a flow signal is obtained through the flowmeter 3, and the signal enters the control computer 11 through the signal transmission line 10, and the flow of kerosene can be detected in real time from the control computer. The kerosene continues to pass through the cooling channel of the supersonic combustion chamber 4 to cool the supersonic combustion chamber 4. The kerosene coming out of the supersonic combustion chamber 4 is high-temperature kerosene, and then passes through a high-temperature flow regulating valve 5, which is mainly used to regulate flow and pressure. After coming out of the high-temperature flow regulating valve 5, the kerosene is injected into the supersonic combustion chamber 4 for ignition and combustion, so that the kerosene forms a closed-loop combustion process. The valve stem of the high temperature flow regulating valve 5 is connected with a motor 7 through a coupling 6, so that the rotation of the motor 7 can drive the high temperature flow regulating valve 5 to perform switch operation. The motor 7 is connected to a motor controller 9 through the control line 8 to work. The motor controller 9 can operate the motor 7 to perform forward and reverse rotation and speed regulation through the control signal given by the control computer 10, so that the high temperature The flow regulating valve 5 performs switching operations at different speeds.

After increasing the flow regulating valve 5, the throat area can be adjusted. The traffic at this time can be analyzed as follows.

In order to keep the flow constant, there is

$\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; Q</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 7</span>}<span\; class="notranslate">\; )</span>$

Differentiate for the three parameters respectively, we have

$\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; A</span>}}\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; A</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; =</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; \&rho;</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; u</span>}}\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; u</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 8</span>}<span\; class="notranslate">\; )</span>$

Neglecting the change in velocity, we have

$\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; A</span>}}\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; A</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; =</span><span\; class="notranslate">\; -</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; \&rho;</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; ></span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 9</span>}<span\; class="notranslate">\; )</span>$

It can be seen that the rate of change of the area is equal to the function of the rate of change of the density and the rate of change of the flow velocity, and the throat area can be obtained by the rotation of the valve, namely

dA=vdt(10)

In the above formula, v is the speed of the motor. It is defined that the forward rotation of the motor is v>0, and the reverse rotation of the motor is v<0. Then the above formula can be written as

$\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; A</span>}}\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; =</span><span\; class="notranslate">\; -</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; \&rho;</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 11</span>}<span\; class="notranslate">\; )</span>$

When the temperature of kerosene increases, the density decreases and the flow rate decreases, namely

$\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; \&rho;</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; <</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 12</span>}<span\; class="notranslate">\; )</span>$

at this time

$\mathrm{<span\; class="notranslate">\; v</span>}<span\; class="notranslate">\; =</span><span\; class="notranslate">\; -</span>\frac{\mathrm{<span\; class="notranslate">\; A</span>}}{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}\frac{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; \&rho;</span>}}{\mathrm{<span\; class="notranslate">\; d</span>}\mathrm{<span\; class="notranslate">\; t</span>}}<span\; class="notranslate">\; ></span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 13</span>}<span\; class="notranslate">\; )</span>$

That is, the motor rotates forward, and the valve opens. Conversely, when the temperature of kerosene decreases, the density increases, and the flow rate increases, the valve needs to be opened larger.

Therefore, in the supersonic combustion test using kerosene active cooling, the working process of the kerosene flow control device is:

During the experimental operation, kerosene cools the wall of the combustion chamber. When the temperature of kerosene rises, the density of kerosene decreases, and the flow rate of kerosene in the channel decreases. Calculation, it is necessary to control the rotation speed of the valve per unit area of the motor to be equal to the reduction speed of the kerosene density, and the computer sends an instruction to the motor controller 9 from the calculation result, so that the motor 7 drives the valve 5 to perform a large rotation according to the calculation result, and then It can increase the kerosene flow, so that the kerosene flow increased by opening the large valve is just equal to the flow loss caused by the decrease of kerosene density, so as to achieve the purpose of controlling the flow stability.

During the experiment operation, when the kerosene is cooled too much, the temperature of kerosene decreases, the density of kerosene increases, and the flow rate of kerosene in the channel increases. The kerosene flowmeter 3 transmits the flow increase signal to the control computer 11. After the control computer 11 calculates, it needs to control the motor The rotation speed of the closed valve per unit area is equal to the increase rate of kerosene density, and the computer sends the calculation result to the motor controller 9 to make the motor 7 drive the valve 5 to close and rotate according to the calculation result, so that the kerosene flow can be reduced, so that The kerosene flow rate reduced by closing the small valve is just equal to the flow rate increase caused by the increase of kerosene density, so as to achieve the purpose of controlling the flow rate stability.

In the actual experiment, in order to maintain accurate control of the flow rate at all times, a control computer 10 is used to detect the change of the kerosene flow rate according to the signal of the flow meter 3. When the flow rate decreases, the motor driver 9 is controlled by the control program to drive the motor 7 Drive the flow regulating valve 5 to carry out the operation of opening the large valve. Conversely, when the flow rate increases, the operation of closing the valve is carried out.

As shown in Figure 7, in a typical supersonic combustion test using kerosene cooling, kerosene flow control is not used for the upper cooling plate of the combustion chamber, and kerosene flow control is used for the western cooling panel. The flow comparison between the two can be clearly seen , the flow rate of the upper plate has been decreasing, and the flow rate of the west plate is always stable near a stable value due to the flow control. This proves the success of the kerosene flow control method in this set of supersonic combustion experiments.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (3)

1. a kerosene oil flow control device for Supersonic combustion tests, is characterized in that, comprising: controlUnit processed, flowmeter, supersonic speed combustion chamber, kerosene conveying pipe, flow control valve and regulon,Wherein, described control module is connected with regulon with described flowmeter respectively, described regulon and instituteState flow control valve and be connected, described flowmeter and flow control valve are all positioned on kerosene conveying pipe; DescribedSupersonic speed combustion chamber is connected with described kerosene conveying pipe;

Described flowmeter detects the kerosene oil flow of the cooling conduit that inputs to supersonic speed combustion chamber in real time, and willKerosene oil flow information is sent to described control module; Described control module is according to the kerosene oil flow letter receivingBreath, by regulon control flow control valve, regulates the coal that inputs to described supersonic speed combustion chamber burningThe flow of oil;

Described regulon comprises connected successively electric machine controller, motor and shaft coupling, wherein, described inElectric machine controller is connected with described control module, the valve rod phase of described shaft coupling and described flow control valveConnect; Described electric machine controller is according to the control of described control module, regulate described motor rotation direction andRotating speed; Described motor drives described flow control valve to carry out the switch behaviour of friction speed by described shaft couplingDo.

2. device as claimed in claim 1, is characterized in that,

In the time that the kerosene oil flow in kerosene conveying pipe reduces, the flowmeter that described control module monitorsKerosene oil flow signal reduces, and carries out valve by regulon control flow control valve and opens large operation;

In the time that the kerosene oil flow in kerosene conveying pipe increases, the flowmeter that described control module monitorsKerosene oil flow signal increases, and carries out by regulon control flow control valve the operation that valve turns down.

3. device as claimed in claim 2, is characterized in that,

In the time that the kerosene oil flow in kerosene conveying pipe reduces, described control module is by regulon controlFlow control valve carries out valve and opens large operation, the density of opening large speed and equal kerosene of valve unit areReduce speed, make the kerosene oil flow by opening large valve increase equal the kerosene that kerosene density reduces to causeFlow loss, thus the kerosene oil flow in retentive control process is constant;

In the time that the kerosene oil flow in kerosene conveying pipe increases, described control module is by regulon controlFlow control valve carries out the operation that valve turns down, and the speed that turns down of valve unit are equals kerosene densityPush the speed, make the kerosene oil flow reducing by pass minor valve equal the kerosene that the increase of kerosene density causesFlow increases, thereby the kerosene oil flow in retentive control process is constant.