Flowing heat exchange experimental device for micro-tube bundle precooler

Abstract

The invention discloses a flow heat exchange experimental device for a micro-tube bundle precooler. An air inlet of a micro-tube bundle test unit in the experimental device is communicated with a fan through an air inlet pipeline, and an air outlet is connected with an exhaust pipeline; the differential pressure gauge is communicated with the gas inlet pipeline and the gas outlet pipeline; the inlet temperature sensor is communicated with an air inlet pipeline, and the outlet temperature sensor is communicated with an exhaust pipeline; a flow meter is mounted in the exhaust pipeline; the two ends of a micro-tube bundle of the micro-tube bundle testing unit are electrically connected with a variable-voltage direct-current power supply, and the micro-tube bundle emits heat through resistance of the micro-tube bundle and exchanges heat with passing airflow; a plurality of thermocouples are arranged in the micro tube bundle; and the data acquisition instrument is in signal connection with the flow meter, the differential pressure gauge, the inlet temperature sensor, the outlet temperature sensor and the plurality of thermocouples. The experimental device can be used for testing the flow heat exchange performance of the precooler with the micro tube bundles with different outer diameters, different arrangements and different tube row numbers under different airflow impact angles.

Description

technical field [0001] The invention relates to the technical field of heat exchangers, in particular to a flow heat exchange experimental device for a microtube bundle precooler. Background technique [0002] In the field of hypersonic air-breathing combined engines, using an air precooler to cool the high-temperature incoming flow to widen the working envelope of the turbine engine is currently the most effective means in the field of combined engines. The tubular heat exchanger composed of ultra-thin and ultra-fine tube bundles has the characteristics of light weight and high efficiency. [0003] However, the heat transfer mechanism of the precooler is complex, and the outer diameter, arrangement structure, row number and impact angle of the airflow of the micro tube bundles will all affect the heat transfer performance of the precooler. At present, domestic and foreign research on ultra-thin and ultra-fine tube bundle heat exchangers mainly focuses on simulation calcula...

AI Technical Summary

Problems solved by technology

[0003] However, the heat transfer mechanism of the precooler is complex, and the outer diameter, arrangement structure, row number and impact angle of the airflow of the fine tube bundles will affect the heat transfer performance of the precooler.

At present, domestic and foreign research on ultra-thin, ultra-fine and micro-tube bundle heat exchangers mainly focuses on simulation calculations, and there are few experimental studies.

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