Shunting type multi-pipe pulse detonation combustion chamber

Abstract

The invention provides a shunting type multi-pipe pulse detonation combustion chamber. After airflow passes through a front diffuser of the combustion chamber, part of the airflow flows into detonation pipes from the head portions of the detonation pipes, and the other part of the airflow flows through the outside of the detonation pipes; a valve block is arranged on the head portion of each detonation pipe, and four deflation rings are arranged on each detonation pipe; in a filling state, the valve blocks on the heat portions are opened so that air can enter the detonation pipes, the first two deflation rings on each detonation pipe are used for auxiliary air intake to increase the filling speed, and one-way valves are installed in the last two deflation rings on each detonation pipe; and the valves are closed in the filling stage. In the spreading and combustion product discharging stage formed by detonation waves, the gas pressure in the detonation pipes is higher than the pressure outside the detonation pipes, the air inlet valve blocks on the head portions are closed, the exhaust valves are opened, part of high-pressure high-temperature gas is exhausted from the deflation rings to be mixed with the airflow outside the detonation pipes, and the other part of the high-pressure high-temperature gas is exhausted from the tail portions of the detonation pipes and exhausted into a turbine after being mixed in a combustion chamber case. Through the two mixing processes, the effects of adjusting the exhaust temperature of the detonation chamber and reducing the impact of exhaust gas to the turbine are achieved.

Description

technical field [0001] The invention belongs to the technical field of engines, in particular to a split-flow multi-tube pulse detonation combustion chamber. Background technique [0002] Pulse detonation engine (PDC) is a new concept engine that uses high-temperature and high-pressure gas generated by periodic detonation waves to generate thrust. This engine has been favored by researchers at home and abroad because of its high cycle thermal efficiency and simple structure. widespread attention. According to whether it has its own oxidant, the pulse detonation engine can work in two modes: air-breathing and rocket. The air-breathing pulse detonation engine is divided into basic pulse detonation engine, pulse detonation turbine engine and combined Pulse detonation engine. The basic pulse detonation engine is mainly composed of an intake port, a detonation combustion chamber and a tail nozzle. The high-temperature, high-speed detonation gas is directly discharged from the de...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to solve the problems such as the burning of the turbine blades by the transient high temperature and the impact of the periodic air flow on the turbine during the matching work between the pulse detonation combustion chamber and the turbine, the present invention provides a The split-flow multi-tube pulse detonation combustor can adjust the exhaust temperature of the detonation chamber and slow down the impact of the exhaust gas on the turbine through the reasonable distribution of the intake and exhaust of multiple pairs of detonation chambers.

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