Detonation tube structure of a rotary pulse detonation engine

Abstract

The invention provides a detonation tube structure of a rotary pulsed detonation engine. A swastika-shaped rotational structure enables airflow to form radial and circumferential secondary flow in a pipeline; and oil mist sprayed by oil spray tubes are perpendicular to the direction of main flow, and the atomization speed and the oil-gas mixing degree can be increased. After oil and gas are mixed, combustible mixed gas is ignited by sparking plugs, and deflagration is caused. Since the combustible gas speed is far greater than the gas flow speed of inlets of detonation tubes, the radial and circumferential secondary flow of the detonation tubes can be enhanced; and spiral grooves in the portions, behind the corresponding sparking plugs, of the inner walls of the detonation tubes can increase the tube inner turbulivity and enable the combustible gas flowing through to further rotate in the circumferential direction, accordingly the converting distance from deflagration to detonation is shortened, the lengths of the detonation tubes are shortened, and the working reliability of the detonation tubes are improved. In addition, since the four detonation tubes work at the same time, the power output range is wider, and adjustment is more flexible.

Description

technical field [0001] The invention belongs to the field of pulse detonation engines, and in particular relates to a detonation tube structure of a rotary pulse detonation engine which utilizes detonation waves to generate thrust and output shaft work. Background technique [0002] The pulse detonation engine is a new type of power device developed based on the new concept of detonation combustion. It has the advantages of simple structure, small size, wide application range, low cost, and a thrust-to-weight ratio of up to 20. Based on the above advantages, the pulse detonation engine can be applied to the power plant of small aircraft and unmanned aerial vehicles, and can also be used as the power of the propeller tip jet rotorcraft. It can also be developed into a power propulsion device for high-altitude aircraft in the future. [0003] The basic principle of the pulse detonation engine to output power is to use the periodic detonation waves generated by the detonation t...

AI Technical Summary

Problems solved by technology

This technology adopts a self-supply air scheme, the fuel injection direction is radial, and the oil-gas mixing degree is high, which can effectively shorten the length of the detonation tube of the detonation engine and improve the problem of low fuel utilization.

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