Air inlet of air-breathing pulse detonation engine

Abstract

The invention discloses an air inlet of an air-breathing pulse detonation engine. The housing of the engine constitutes the circular air inlet, wherein an inlet cone is arranged on the medial axis at the rear end of the air inlet; a cylindrical structure at the rear part of the inlet cone and the housing of the engine constitute a ring-shaped channel; the air flow is fed into a special-shaped channel having a special-shaped structure via the ring-shaped channel; the special-shaped channel is evenly distributed on the circumference of the air inlet with the distance between the central symmetrical curve of the special-shaped channel and the medial axis of the engine remaining unchanged but deviating along the circumference; a fuel channel is arranged on the medial axis of the inlet cone, and the two ends of the fuel channel are connected with the fuel inlet and a fuel injection lever located on the medial axis outside the rear end of the cylindrical structure; the fuel injection lever is particularly a hollow oil tube with one end thereof being closed; a plurality of fuel injection holes are formed on the lateral surface of the fuel injection lever; the housing of the engine and the rear end surface of the cylindrical structure constitute a mixing chamber; and an igniter is located on the lateral wall of the mixing chamber. The invention can improve the atomization and evaporation of the fuel and reduce the impact of reversed fuel on the air inlet.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an intake port of a pulse detonation engine. Background technique [0002] The pulse detonation engine is a new concept propulsion device that uses high-temperature, high-pressure gas generated by intermittent detonation waves to generate thrust. Pulse detonation engines are divided into air-breathing pulse detonation engines and rocket-type pulse detonation engines according to whether they have their own oxidant. [0003] In view of the working characteristics of the air-breathing pulse detonation engine, its intake port and head structure are particularly important. It not only needs to provide a continuous and stable incoming flow for the stable operation of the engine, but also needs to maintain a small total pressure loss and a high stability margin under the periodically oscillating back pressure transmitted from the downstream detonation chamber. A rotary valve intake p...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the existing technology that cannot take into account the simple and reliable structure and the mixing of oil and gas, the present invention provides an intake port of an air-breathing pulse detonation engine, which can improve the working stability of the air-breathing pulse detonation engine and improve the air flow and fuel flow. The blending can reduce the blending distance, thereby shortening the length of the engine, and can reduce the impact of backflow gas on the intake port

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