Circulating heat dissipation device for tailpipe nozzle

Abstract

The invention provides a circulating heat dissipation device for a tailpipe nozzle. The circulating heat dissipation device comprises a hot-cavity heat exchanger and a cold-cavity heat exchanger, a hot cavity formed in the hot-cavity heat exchanger is connected with a cold cavity formed in the cold-cavity heat exchanger through an outflow pipe and a return pipe, and the hot-cavity heat exchanger is connected with the tailpipe nozzle; the pipe diameter of the outflow pipe is greater than the pipe diameter of the return pipe; the hot cavity is used for holding a first circulating working mediumreturned through the return pipe and being subjected to heat exchanging in the cold cavity and a second circulating working medium in the liquid state; and the cold cavity is used for holding the first circulating working medium returned through the return pipe and being subjected to heat exchanging in the hot cavity and the second circulating working medium in the gas state. According to the circulating heat dissipation device for the tailpipe nozzle, the characteristic that the second circulating working medium is gasified after being heated is utilized to form a hot gas dynamic pressure difference between the hot cavity and the cold cavity so that the first circulating working medium and the second circulating working medium can make circulating reciprocating movement between the hot cavity and the cold cavity, continuously absorbs heat of the tailpipe nozzle in the hot cavity, and conducts heat exchanging with air in the cold cavity to realize circulating heat dissipation of the tailpipe nozzle.

Description

technical field [0001] The invention relates to the technical field of heat dissipation, in particular to a circulating heat dissipation device for a tail nozzle. Background technique [0002] In the design of stealth aircraft, the advanced exhaust nozzle system is a very important part. Stealth aircraft not only need the tail nozzle to significantly reduce the exhaust temperature of the engine, avoid the radar waves injected from the rear hemisphere from looking directly at the engine turbine blades, shorten the distance locked by infrared guided air-to-air missiles, but also keep the aircraft's tail nozzle infrared Stealth performance. [0003] In order to realize the infrared stealth performance of the aircraft tail nozzle, it is necessary to mix the hot jet air flow of the tail nozzle with the external cold air to reduce the exhaust temperature, and at the same time reduce the temperature of the tail nozzle heated by the jet air flow, so as to realize the Infrared stea...

AI Technical Summary

Problems solved by technology

[0005] Therefore, there are at least the following technical defects in the prior art: the method of improving the structural shape for heat dissipation cannot be actively dissipated, resulting in poor heat dissipation; and the method of using an external drive pump for heat dissipation requires an additional drive pump to be installed on the aircraft , affect aircraft performance and stealth effect

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