Plasma concave-cavity flame stabilizer for engine
A plasma and burner technology, applied in the application field of aerospace power system, can solve the problems of narrow application range, self-excited oscillation, large cavity resistance, etc., and achieve enhanced fuel injection activity, rapid response and control, The effect of a small price
Inactive Publication Date: 2014-07-30
PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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[0013] The purpose of the present invention is to solve the problems of self-excited oscillation, large cavity resistance and narrow application range in conventional concave cavity flame stabilizers, and propose a new type of engine plasma concave cavity flame stabilizer
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[0032] The plasma exciter is a plasma exciter unit or a plasma exciter array composed of a plasma exciter unit, and the plasma exciter unit or a plasma exciter array is arranged upstream of the cavity of the plasma cavity , around the fuel injection hole, the upstream flow boundary of the concave cavity, the front wall of the concave cavity, the bottom of the concave cavity, the rear wall of the concave cavity, and the downstream surface of the concave cavity;
[0033] The form of the plasma actuator is either a dielectric barrier discharge plasma actuator or an arc discharge plasma actuator;
[0034] The dielectric barrier discharge plasma actuator unit or the symmetrical dielectric barrier discharge plasma actuator unit (see Figure 3a ), or an asymmetric dielectric barrier discharge plasma actuator element (see Figure 3b ), the symmetric dielectric barrier discharge plasma actuator unit is composed of the first exposed electrode 15, the first implanted electrode 16 and the ...
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The invention belongs to the technical field of application of aerospace power systems, and relates to a flame stabilization technology of an engine combustion chamber based on a concave cavity flame stabilizer. The purpose is to solve the problem of self-excited oscillation in the conventional concave cavity flame stabilizer. Plasma actuators are installed on the upstream, front wall, bottom wall, rear wall, downstream, and fuel nozzles of conventional concave cavity flame stabilizers. The plasma actuators generate non-equilibrium plasma through air discharge, and the non-equilibrium plasma induced The electric field force and the released heat exert a control effect on the flow field of the cavity, reduce the resistance of the cavity, inhibit the self-excited oscillation of the cavity, and activate, dissociate, and ionize the injected fuel to further improve the combustion efficiency.
Description
technical field [0001] The invention belongs to the technical field of application of aerospace power systems, and relates to a plasma combustion stabilizing technology in a combustion chamber of an engine based on a concave cavity flame stabilizer. Background technique [0002] The rapid development of the aerospace field requires aircraft to fly faster and farther at a more economical price, which puts forward higher requirements for the propulsion device of the aircraft, especially for scramjet engines and combined engines, combustion The airflow velocity in the chamber can often reach thousands of meters per second, and the length of the combustion chamber cannot be very long due to factors such as weight, size, heat protection, etc., resulting in a very short residence time of the fuel in the supersonic combustion chamber. Therefore, how to realize high-efficiency mixing and stable combustion in the supersonic combustion chamber is one of the most important key technolo...
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IPC IPC(8): F23R3/22
Inventor 聂万胜车学科田希晖何浩波冯伟苏凌宇侯志勇程钰锋丰松江冯必鸣周思引
Owner PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV