Integrated casing for combined engine

Abstract

The invention discloses an integrated casing for a combined engine and belongs to the technical field of structural design of combined engines. The casing is in the shape of a hollow annular cavity structure, the two ends of the annular cavity structure are each provided with a gas collecting cavity, the gas collecting cavities communicate with the outside by through hole structures on the outer circumferential surface of the annular cavity structure, the two gas collecting cavities are respectively a helium outlet and a gas inlet, the through hole structure corresponding to the helium outletis a helium inlet, the through hole structure corresponding to the gas inlet is a gas outlet, the gas inlet is connected with an outer combustion chamber outlet casing, and the helium inlet is connected with a high-temperature heat exchanger pipeline. A helium gas inlet pipe is coupled with a gas casing, so that the requirements for compact structure and low flow resistance of the combined enginecan be met.

Description

technical field [0001] The invention belongs to the technical field of combined engine structure design, and in particular relates to an engine casing structure using two working media. Background technique [0002] In the field of hypersonic air-breathing combined engines, using the third medium fluid (usually helium) to cool the high-temperature incoming air to reduce the airflow temperature before the air compressor, and the scheme of widening the working speed range of the turbine engine is the current hypersonic engine. An important development direction, such engine schemes usually use a helium turbine instead of a gas turbine to drive the air compressor. The traditional gas exhaust casing and helium intake casing have loose structures and large component sizes, which will lead to air compressor-helium turbine The increase in the length of the shaft system is not conducive to the reliable operation of the shaft system. At the same time, it will greatly increase the axi...

AI Technical Summary

Problems solved by technology

[0002] In the field of hypersonic air-breathing combined engines, using the third medium fluid (usually helium) to cool the high-temperature incoming air to reduce the airflow temperature before the air compressor, and the scheme of widening the working speed range of the turbine engine is the current hypersonic engine. An important development direction, such engine schemes usually use a helium turbine instead of a gas turbine to drive the air compressor. The traditional gas exhaust casing and helium intake casing have a loose structure and large component sizes, which will lead to air compressor-helium turbine The increase in the length of the shaft system is not conducive to the reliable operation of the shaft system. At the same time, it will greatly increase the axial size of the engine, which cannot meet the design requirements of the high-compact engine structure

Images