Efficient and compact pre-cooling heat exchanger for pre-cooling gas sucking type engine

Abstract

The invention discloses an efficient and compact pre-cooling heat exchanger for a pre-cooling gas sucking type engine. The efficient and compact pre-cooling heat exchanger for the pre-cooling gas sucking type engine comprises a pre-cooling heat exchanger body in the shape of a similar cylinder; the cross section of the similar cylinder is in the shape of a ring different in diameter; the longitudinal section of the similar cylinder is formed by two symmetrically arranged arc segments; the center angle of each arc segment is 45 degrees; the pre-cooling heat exchanger body comprises a cold flow outlet pipe, a cold flow inlet pipe and a plurality of heat exchanging pipes; each heat exchanging pipe is in the shape of an arc; the arc-shaped center angle of each heat exchanging pipe is 45 degrees; and the heat exchanging pipes are distributed into the similar cylinder in a crossed manner. The efficient and compact pre-cooling heat exchanger for the pre-cooling gas sucking type engine can have the engineer realizability on the premise that the heat exchanging effect is guaranteed, so that air incoming flow in front of a gas compressor can be pre-cooled, the high temperature over-running problem of gas compressor blades is solved, the engine thrust is increased, the flight envelop is extended, the welding difficulty is effectively reduced, the frosting blockage problem is effectively solved, the engineer realizability is achieved under the current technology, and after the efficient and compact pre-cooling heat exchanger for the pre-cooling gas sucking type engine is applied to the pre-cooling gas sucking type engine, the engine performance can be substantially improved.

Description

technical field [0001] The invention relates to the technical field of precooling heat exchangers, in particular to an efficient and compact precooling heat exchanger for precooling air-breathing engines. Background technique [0002] As near space has gradually become an important operational field of modern air-space integrated operations, the research progress of near space vehicles has attracted the attention of all countries. The power system is the core component of the near-space vehicle, which enables the vehicle to have the ability to freely enter the near space and the ability to cruise at high altitude. [0003] Combined power engines can well meet the power requirements of near-space vehicles. A lot of research has been done in this area at home and abroad. At present, rocket-based combined cycle engines (RBCC) and turbine-based combined cycle engines (TBCC) are relatively mature combined power engines. system. These two types of engines need to suck air into t...

AI Technical Summary

Problems solved by technology

[0006] It can be seen that for high-efficiency compact pre-cooling heat exchangers, domestic and foreign are still in the stage of research on the flow conditions in micro-channels, and there are few researches on how to enhance the heat transfer effect of compact circular tube heat exchangers macroscopically.

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