KR101005756B1 - Gas generator mixing ratio control device and its control method in turbo pump gas generator connection test - Google Patents

Abstract

The gas generator mixing ratio control apparatus and control method in the turbopump gas generator connection test according to the present invention, by adjusting the flow rate of the oxidant and the fuel supplied to the gas generator by the pressure difference between the oxidant supply pipe and the fuel supply pipe, It is easy to change the mixing ratio of and fuel, and there is an advantage that the changed mixing ratio can be kept constant during the experiment.

The gas generator mixing ratio control apparatus in the disclosed turbopump gas generator linkage test changes the mixing ratio of the oxidant and fuel by adjusting the flow rate of the oxidant and the fuel supplied to the gas generator by the pressure difference between the oxidant supply pipe and the fuel supply pipe. This is easy and has the advantage of maintaining a constant mixing ratio during the experiment.

Liquid Rocket Engine, Gas Generator, Mixing Ratio, Oxidizer, Fuel

Description

Mixer ratio control system and method for controlling the gas generator in the turbo pump gas generator connection test {Mixture Ratio Control System of Gas Generator in Turbo pump Gas Generator Coupled Test}

The present invention relates to a gas generator mixing ratio control device and a control method thereof in a turbo pump gas generator connection test, and more particularly, to a control device and a control method for maintaining a constant gas generator mixing ratio in a turbo pump gas generator connection test. will be.

In general, a rocket is a device that obtains propulsion by injecting high-pressure gas produced by burning propellant, and is used to put satellites in orbit. The engine of the rocket burns propellant as quickly as it exerts a very large force, so it consumes a lot of propellant in a short time and generates hot combustion gas.

The liquid rocket engine is a flying device that mixes an oxidant stored therein with fuel, burns it in a combustion chamber, and ejects its exhaust gas through a nozzle to obtain propulsion force according to the action-reaction principle. The liquid rocket engine as described above can easily control the combustion amount through the valve and the pump, and is easy to re-ignite, so it is a trend that is preferred to the solid rocket engine.

At this time, the propellant, that is, the oxidant and the fuel is sprayed through the injector of the combustor head, and as the fuel, gasoline, paraffin, liquid hydrogen, etc. are used, and as the oxidant, dinitrogen tetraoxide, liquefied oxygen, etc. are used.

The turbopump gas generator linkage test is a test integrating a supply system except a combustor in a liquid rocket engine.

The gas generator mixing ratio should be kept constant during the experiment and should be easy to change if it needs to be changed according to the test results.

The gas generator mixing ratio control apparatus and control method in the turbopump gas generator connection test according to the prior art, the oxidant supply pipe and the fuel flows through which the oxidant flows in order to maintain a constant mixing ratio of the gas generator oxidant and fuel The flow meter was placed in the fuel supply pipe, and the mixing ratio was adjusted according to the flow signal measured by the flow meter.

That is, the oxidant supplied by the oxidant supply pump flows into the gas generator through the oxidant supply pipe, and the fuel supplied by the fuel supply pump flows into the gas generator through the fuel supply pipe and is mixed. In this case, two flowmeters are disposed in series in the oxidant supply pipe and the fuel supply pipe for accuracy.

However, the gas generator mixing ratio control apparatus and control method in the turbo pump gas generator connection test according to the prior art, because the flow meter is disposed in the oxidant supply pipe and the fuel supply pipe, the length of each of the oxidant supply pipe and the fuel supply pipe becomes longer. It is complicated, and there is a problem that a differential pressure loss occurs accordingly.

In addition, when controlling the mixing ratio based on the flow signal measured in the flow meter as described above, there is a disadvantage in the real-time control because the response characteristics according to the flow rate is slow.

The present invention was devised to solve the above problems, the structure is simple to reduce the volume, to minimize the differential pressure of the pipe, the response characteristics can be improved effective control of the mixing ratio according to the variable mixing ratio An object of the present invention is to provide a gas generator mixing ratio control device and control method in a turbopump gas generator connection test.

Gas generator mixing ratio control apparatus in the turbo pump gas generator connection test according to the present invention, the oxidant supply pump for supplying the oxidant to the gas generator through the oxidant supply pipe; A fuel supply pump supplying fuel to the gas generator through a fuel supply pipe; A turbine which is rotated by being supplied with a mixture of fuel and oxidant supplied to the gas generator to drive the fuel supply pump and the oxidant supply pump; An oxidant pressure gauge provided in the oxidant supply pipe to measure a supply pressure of the oxidant; A fuel pressure gauge provided in the fuel supply pipe to measure a supply pressure of the fuel; An oxidizer throttle valve provided in the oxidant supply pipe to adjust a flow rate of the oxidant flowing through the oxidant supply pipe; A fuel throttle valve provided in the fuel supply pipe to adjust a flow rate of the fuel flowing through the fuel supply pipe; The fuel pressure gauge and the oxidant pressure gauge may receive a supply pressure of the fuel and oxidant may include a control unit for adjusting the opening amount of the oxidizer throttle valve and the fuel throttle valve.

In addition, the gas generator mixing ratio control method in the turbo pump gas generator connection test according to the present invention, the oxidant supply pressure measuring step of measuring the supply pressure of the oxidant supplied to the gas generator through the oxidant supply pipe; A fuel supply pressure measuring step of measuring a supply pressure of a fuel supplied to the gas generator through a fuel supply pipe; And a mixing ratio maintaining step of adjusting a flow rate of the oxidizing agent and the fuel so that the mixing ratio of the oxidizing agent and the fuel is kept constant according to the measured supply pressure of the oxidizing agent and the measured supply pressure of the fuel.

The method may further include a mixing ratio changing step of changing the mixing ratio of the oxidant and the fuel to a target mixing ratio through a pressure increase or decrease that is a difference between the supply pressure of the oxidant and the supply pressure of the fuel.

In the mixing ratio change step, the supply pressure of the other side may be determined based on the supply pressure of one side of the oxidant or fuel.

In the mixing ratio changing step, the supply pressure of the fuel is determined based on the supply pressure of the oxidant, and the supply pressure of the fuel may be determined by [Equation 1].

[Equation 1]

P2 = P1 + dP,

dP = f (m_total, dMR_gg),

P1: supply pressure of oxidant,

P2: supply pressure of fuel,

dP: increase and decrease pressure,

m_total: total flow rate of fuel and oxidant,

dMR_gg: Change target mix ratio.

The increase / decrease pressure may be determined by a database in which the increase / decrease pressure is previously input according to the total flow rate sum of the flow rates of the fuel and the oxidant and the target mixing ratio.

The gas generator mixing ratio control apparatus and control method in the turbopump gas generator connection test according to the present invention, by adjusting the flow rate of the oxidant and the fuel supplied to the gas generator by the pressure difference between the oxidant supply pipe and the fuel supply pipe, It is easy to change the mixing ratio of and fuel, and there is an advantage that the changed mixing ratio can be kept constant during the experiment.

In addition, the gas generator mixing ratio control apparatus and control method in the turbopump gas generator connection test according to the present invention, the flow rate is not disposed in the oxidant supply pipe and the fuel supply pipe, the length of the oxidant supply pipe and the fuel supply pipe There is an advantage to minimize the volume can be reduced.

In addition, the gas generator mixing in the turbo pump gas generator connection test according to the present invention

The non-control device and control method have an advantage of improving response characteristics by controlling the pressure of the oxidant supply pipe and the fuel supply pipe based on the pressure.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in this specification and claims should not be construed in a common or dictionary sense, and the inventors will be required to properly define the concepts of terms in order to best describe their invention. Based on the principle that it can, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various equivalents may be substituted for them at the time of the present application. It should be understood that there may be water and variations.

1 is a block diagram showing a gas generator mixing ratio control apparatus in a turbo pump gas generator connection test according to the present invention.

Gas generator mixing ratio control device in the turbo pump gas generator connection test according to the present invention, the oxidant supply pump (OP) for supplying the oxidant to the gas generator (GG) through the oxidant supply pipe 110, and the fuel supply pipe 120 Fuel supply pump (FP) for supplying fuel to the gas generator (GG) through a) and a mixture of the fuel and the oxidant supplied to the gas generator (GG) is rotated and the fuel supply pump (FP) And a turbine (T) for driving an oxidant supply pump (OP), an oxidant pressure gauge (111) provided in the oxidant supply pipe (110) for measuring a supply pressure of the oxidant, and the fuel supply pipe (120). And a fuel pressure gauge 121 for measuring a supply pressure of the fuel, and an oxidizer throttle valve 113 provided at the oxidant supply pipe 110 to adjust a flow rate of the oxidant flowing through the oxidant supply pipe 110. , The fuel supply pipe (1 20 and a fuel throttle valve 123 for adjusting the flow rate of the fuel flowing through the fuel supply pipe 120, the supply pressure of the oxidant in the oxidant pressure gauge 111 and the fuel pressure gauge 121 and Receiving a supply pressure of the fuel includes a control unit for adjusting the opening amount of the fuel throttle valve 123 and the oxidizing throttle valve 113.

The oxidant supply pump OP is connected to an oxidant tank OT in which the oxidant is stored, and the fuel supply pump FP is connected to a fuel storage tank FT in which the fuel is stored.

The gas generator (GG) generates a mixer by receiving the oxidant and fuel. On the other hand, the mixer generated in the gas generator (GG) flows to the turbine (T) to flow the turbine (T), by the drive of the turbine (T) the oxidant supply pump (OP) and the fuel supply pump ( Driving force is transmitted to the FP).

The oxidant pressure gauge 111 is provided in the oxidant supply pipe 110 to measure the supply pressure of the oxidant flowing through the oxidant supply pipe 110, the fuel pressure gauge 121 is the fuel supply pipe 120 It is provided in the fuel supply pipe 120 to measure the supply pressure of the fuel flowing.

The oxidant supply pipe 110 and the fuel supply pipe 120 is preferably provided with a check valve to prevent the back flow of the oxidant or fuel.

The oxidant pressure gauge 111 and the fuel pressure gauge 121 are connected to the control unit to transmit the supply pressures of the oxidant supply pipe 110 and the fuel supply pipe 120.

On the other hand, the position where the oxidant pressure gauge 111 and the fuel pressure gauge 121 measures the supply pressure of the oxidant and the supply pressure of the fuel, the rated operation that the mixing ratio in the gas generator (GG) satisfies the design value At the point, the gas generator (GG), the oxidant supply pipe 110 and the fuel supply pipe 120 are respectively positioned at the same pressure.

The oxidized throttle valve 113 and the fuel throttle valve 123 are connected to the control unit so that the opening amount can be adjusted by the signal of the control unit, and the oxidized throttle valve 113 and the fuel throttle valve 123 are the It is provided in the oxidant supply pipe 110 and the fuel supply pipe 120 to adjust the flow rate of the oxidant and the fuel by adjusting the amount of opening.

The operational effects of the gas generator mixing ratio control method in the turbopump gas generator linked test configured as described above are as follows.

FIG. 2 is a flowchart illustrating a gas generator mixing ratio control method in a turbopump gas generator linked test.

Gas generator mixing ratio control method in the turbopump gas generator connection test according to the present invention, the oxidant supply pressure measuring step of measuring the supply pressure of the oxidant supplied to the gas generator (GG) through the oxidant supply pipe 110 (S100) And, a fuel supply pressure measuring step (S200) of measuring the supply pressure of the fuel supplied to the gas generator (GG) through the fuel supply pipe 120, and the supply pressure of the measured oxidant and the supply of the measured fuel The mixing ratio maintaining step (S400) of adjusting the flow rate of the oxidant and fuel to maintain a constant mixing ratio of the oxidant and the fuel in accordance with the pressure.

The oxidant is supplied to the gas generator (GG) through the oxidant supply pipe 110, and the fuel is supplied to the gas generator (GG) through the fuel supply pipe 120. In this case, the oxidant and the fuel are mixed in the gas generator (GG) to form a mixer, and the mixer flows to the turbine (T) to adjust the output of the turbine (T).

In the mixing ratio maintaining step (S400), if there is no change in the target mixing ratio, the controller supplies the supply pressure of the oxidant measured in the oxidant supply pressure measuring step (S100) and the fuel measured in the fuel supply pressure measuring step (S200). The opening amounts of the oxidizing throttle valve 113 and the fuel throttle valve 123 are adjusted to have the same pressure.

That is, when the supply pressure of the oxidant measured in the oxidant supply pipe 110 and the fuel supply pipe 120 and the supply pressure of the fuel is the same, the mixing ratio is kept constant in the gas generator (GG).

In addition, the gas generator mixing ratio control method in the turbo pump gas generator connection test according to the present invention is adjusted to the target mixing ratio of the mixing ratio of the oxidant and the fuel is changed through the increase and decrease pressure which is the difference between the supply pressure of the oxidant and the supply pressure of the fuel. The mixing ratio further comprises a step (S500).

Of course, the gas generator mixing ratio control method in the turbopump gas generator connection test according to the present invention includes a change whether or not to receive the target mixing ratio change (S300).

In the mixing ratio changing step (S500), the supply pressure of the other side is determined based on one side of the supply pressure of the oxidant or the supply pressure of the fuel.

That is, the supply pressure of the oxidant may be determined based on the supply pressure of the fuel.

Preferably, in the mixing ratio changing step (S500), the supply pressure of the fuel is determined based on the supply pressure of the oxidant, and the supply pressure of the fuel is determined by [Equation 1].

[Equation 1]

P2 = P1 + dP,

dP = f (m_total, dMR_gg),

P1: supply pressure of oxidant,

P2: supply pressure of fuel,

dP: increase and decrease pressure,

m_total: total flow rate of fuel and oxidant,

dMR_gg: Change target mix ratio.

The increase / decrease pressure is determined by a database in which the increase / decrease pressure is previously input in accordance with the total flow rate sum of the flow rates of the fuel and the oxidant and the target mixing ratio.

That is, the controller adjusts the opening amount of the fuel throttle valve 123 according to the increase / decrease pressure obtained from the database to adjust the pressure of the fuel supply pipe 120 to change the mixing ratio of the oxidant and fuel to a target mixing ratio. do.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is described by the person of ordinary skill in the art to which the present invention pertains. Various modifications and variations are possible without departing from the scope of the appended claims.

1 is a configuration diagram showing a gas generator mixing ratio control apparatus in a turbopump gas generator connection test according to the present invention,

FIG. 2 is a flowchart illustrating a gas generator mixing ratio control method in a turbopump gas generator linked test.

<Explanation of symbols on main parts of the drawings>

110: oxidant supply piping 111: oxidant pressure gauge

113: oxidizer throttle valve 120: fuel supply piping

121: fuel pressure gauge 123: fuel throttle valve

OP: oxidant supply pump FP: fuel supply pump

GG: Gas Generator T: Turbine

Claims (6)

An oxidant supply pump for supplying an oxidant to the gas generator through an oxidant supply pipe; A fuel supply pump supplying fuel to the gas generator through a fuel supply pipe; A turbine which is rotated by being supplied with a mixture of fuel and oxidant supplied to the gas generator to drive the fuel supply pump and the oxidant supply pump; An oxidant pressure gauge provided in the oxidant supply pipe to measure a supply pressure of the oxidant; A fuel pressure gauge provided in the fuel supply pipe to measure a supply pressure of the fuel; An oxidizer throttle valve provided in the oxidant supply pipe to adjust a flow rate of the oxidant flowing through the oxidant supply pipe; A fuel throttle valve provided in the fuel supply pipe to adjust a flow rate of the fuel flowing through the fuel supply pipe; And a control unit for receiving the supply pressures of the fuel and the oxidant from the fuel pressure gauge and the oxidant pressure gauge, and controlling the opening amounts of the oxidizer throttle valve and the fuel throttle valve. An oxidant supply pressure measuring step of measuring a supply pressure of an oxidant supplied to the gas generator through an oxidant supply pipe; A fuel supply pressure measuring step of measuring a supply pressure of a fuel supplied to the gas generator through a fuel supply pipe; And In the turbopump gas generator connection test comprising a mixing ratio maintaining step of adjusting the flow rate of the oxidant and the fuel to maintain a constant mixing ratio of the oxidant and the fuel in accordance with the measured supply pressure of the oxidant and the measured fuel supply pressure Gas generator mixing ratio control method. The method according to claim 2, And a mixing ratio changing step of changing the mixing ratio of the oxidizing agent and the fuel to a target mixing ratio through an increase / decrease pressure that is a difference between the supply pressure of the oxidant and the supply pressure of the fuel. . The method according to claim 3, In the mixing ratio change step, The method of controlling the gas generator mixing ratio in the turbo pump gas generator connection test, characterized in that for determining the supply pressure of the other side based on the supply pressure of one side of the oxidant or fuel. The method according to claim 4, In the mixing ratio change step, The supply pressure of the fuel is determined based on the supply pressure of the oxidant, Method for controlling the gas generator mixing ratio in the turbo pump gas generator connection test characterized in that the supply pressure of the fuel is determined by [Equation 1] P2 = P1 + dP, dP = f (m_total, dMR_gg), P1: supply pressure of oxidant, P2: supply pressure of fuel, dP: increase and decrease pressure, m_total: total flow rate of fuel and oxidant, dMR_gg: Change target mix ratio. The method according to claim 5, The increase and decrease pressure is, The method of controlling a gas generator mixing ratio in a turbopump gas generator linked test, wherein the increase / decrease pressure is determined by a previously inputted database according to the total flow rate of the sum of the flow rates of the fuel and the oxidant and the target mixing ratio.

Images