A pulse detonation combustor device based on the combination of rotary valve and pneumatic valve

Abstract

The invention discloses a pulse detonation combustor device based on a rotary valve and pneumatic valve combination. The pulse detonation combustor device based on the rotary valve and pneumatic valve combination comprises a front pipe, a detonation pipe, a rotary valve, a rotary valve shell, a flow guiding block, a pre-detonation pipe, a pneumatic valve and an oil injecting ring; the flow guiding block is installed in the front pipe; the rotary valve and the pneumatic valve are correspondingly connected with the flow guiding block; one end of the pre-detonation pipe is located in the pneumatic valve; the oil injecting ring is installed on the pneumatic valve; the rotary valve shell is installed outside the rotary valve; and an annular channel is formed between the rotary valve and the detonation pipe. The pulse detonation combustor device combines the performance advantages of the rotary valve and the performance advantages of the pneumatic valve, part of air flow is controlled by the rotary valve to alternately enter a detonation pipe channel and the annular channel, and the backflow preventing performance is good; and a spinning disk is adopted as the pneumatic valve, the other part of the air flow enters the detonation pipe through a pneumatic valve channel, and the air inflow stability in the detonation pipe is improved. The conflict between the air inflow stability and the backflow preventing performance of an existing pulse detonation engine and the igniting and detonating problem are solved.

Description

technical field [0001] The invention belongs to the technical field of unsteady supercharged combustion of aero-engines, in particular to a pulse detonation combustion chamber device based on the combination of a rotary valve and a pneumatic valve. Background technique [0002] Combustion waves are divided into two forms: deflagration waves and detonation waves. The former makes the unburned gas mixture react through heat and mass transfer, and its propagation speed depends on the mass diffusivity and reaction rate; detonation combustion relies on the compression of shock waves to make The temperature of the unburned mixture rises and spontaneously ignites, and the detonation wave propagates to the unburned mixture at a speed of several kilometers per second. The traditional propulsion system currently used in aerospace usually adopts the isobaric combustion mode, and it is difficult to further greatly improve the engine efficiency. However, the efficiency of the detonation ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a pulse detonation combustion chamber device based on the combination of a rotary valve and a pneumatic valve. The contradiction between anti-backflow performance and the problem of ignition and detonation

Images