High-altitude heat transfer performance analysis for skin heat exchanger based on ground experiment

Facing to future high-power onboard electronic equipment cooling requirements for our country, it needs to develop a new onboard cooling technology to reduce the dependence on traditional environmental control system. A new gas-gas skin heat exchanger was studied for aircraft thermal management of electronic equipment. The skin heat exchanger is a non-energy consumption of passive heat exchanger with decreasing aircraft performance penalty when it realizes the thermal management for high-power electronic devices. To assess the heat transfer performance of skin heat exchanger onboard, an experimental prototype was designed and its heat transfer performance was carried out on the ground experimental device to obtain the convective heat transfer coefficients of its hot and cold sides. Based on this experiment, the heat transfer performance of skin heat exchanger in high-altitude cruise condition was deduced for the most unfavorable and improved installation position. This study is expected to provide technical support for its future onboard applications.