Stamping engine cooled by carbon dioxide

Abstract

The invention discloses a ramjet engine adopting carbon dioxide for cooling, which comprises an engine shell (3), an air inlet channel (1) is formed at the front end of the engine shell (3), an exhaust nozzle (6) is formed at the rear end of the engine shell (3), a carbon dioxide injection regulator (2) is mounted on the inner wall of the front end of the engine shell (3), and under the condition of low Mach number, the carbon dioxide injection regulator (2) is in a folded state and is in a closed state. Under the condition of high Mach number, the carbon dioxide injection regulator (2) is in an open state. The engine combustion chamber heat shield is cooled by adopting the cooling working medium under the high Mach number (high temperature) incoming flow condition, and the working boundary of the ramjet engine is widened on the basis of the working speed range of a traditional ramjet engine.

Description

technical field [0001] The invention belongs to the technical field of engines and relates to a ramjet cooled by carbon dioxide. Background technique [0002] Thermal protection of ramjet combustion chamber is one of its key technologies. The film cooling thermal protection scheme has been widely used in ramjet engines due to its light structure and weight. [0003] Film cooling uses incoming air to cool the combustion chamber. The cooling gas separates the wall of the combustion chamber from the flame tube, and protects the wall of the combustion chamber. The film cooling mechanism of the combustion chamber is that the amount of air entering the ramjet engine can be divided into two parts, one part flows into the combustion chamber for mixed combustion with fuel, and the other part flows into the cold air channel, and the cold air is sprayed into the main flow along a certain direction near the wall surface. The cold air bends downstream under the pressure and friction o...

AI Technical Summary

Problems solved by technology

[0004] But when the working Mach number of the engine is greater than 4.0, because the total temperature of the incoming air reaches 1000K or even higher, the traditional thermal protection scheme of the incoming air film cooling combustion chamber will no longer be applicable (ie: the traditional ramjet engine The heat shield cooling scheme, due to the high total temperature of the high-speed incoming flow, the air film cooling cannot meet the application requirements)

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