Ma0-5+ wide range precooling and ramjet combination engine axial symmetry adjustable air inlet channel

Abstract

The invention discloses a Ma0-5+ wide range precooling and ramjet combination engine axial symmetry adjustable air inlet channel. The Ma0-5+ wide range precooling and ramjet combination engine axial symmetry adjustable air inlet channel is characterized in that vortex spray and ramjet dual channels are mainly composed of a fixed lip cover profile, a front-back translation center cone and a splitter plate component, and the two channels keep an open state within the Mach number range from 0 to 5+ all the time. Along with rise of the incoming flow Mach number, the center cone horizontally movesforward so as to guarantee high flow coefficient in the wide range, shock wave sealing is realized when the Mach number is above 2, the flow coefficient in an air inlet channel is kept at 1.0, a splitter plate and the center cone are linked, and then the effect that contraction ratios of the vortex spray and ramjet dual channels are increased along with the rise of the Mach number and flow distribution of the two channels is adjusted according to needs is guaranteed. Within a distance, the maximum windward area of the air inlet channel is obviously increased when compared with the capture area.

Description

technical field [0001] The invention belongs to the technical field of advanced intake and exhaust systems for aerospace vehicles, and in particular relates to an axisymmetrically adjustable intake port of a Ma0-5+ wide-range precooling + ram combination engine. Background technique [0002] The intake port is an important component of the air-breathing engine, and its flow capture coefficient is one of its key performance parameters. The performance of the traditional fixed-geometry inlet meets the expected requirements at the design point, but in the non-design point state, the shock wave at the head of the inlet will change greatly, resulting in a significant decline in the capture flow capacity, so its performance in a wide Mach number Cannot always provide enough required flow to the engine when operating in range. In a wide-range pre-cooling + ram combination engine, the turbojet channel is in working condition under the action of the pre-cooler and the full working c...

AI Technical Summary

Problems solved by technology

The performance of the traditional fixed-geometry inlet meets the expected requirements at the design point, but in the non-design point state, the shock wave at the head of the inlet will change greatly, resulting in a significant decline in the capture flow capacity, so its performance in a wide Mach number Does not always provide enough required flow to the engine when operating in range

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