空気予冷却システム(プリクーラ)の開発研究 (第1報:ATREXエンジン用プリクーラの実証)

概要

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Here is presented an experimental and analytical study on a precooler for hypersonic air-breathing engines. Precooling of the incoming air breathed by an air-inlet gives extension of the flight envelope and improvement of the thrust and specific impulse. Three precooler models were installed into an air-turbo ramjet engine and tested under the sea level static condition. When the fan inlet temperature was down to 160K, the engine thrust and specific impulse increased by 2.6 and 1.3 times respectively. parametric studies on the precooler design values and a sizing analysis were also performed, Decrease of tube outer diameter on the precooler is only way to increase heat exchange rates without increase of its weight and pressure loss.
宇宙航空研究開発機構の論文