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Flow Characteristics of Cryogenic Oxidizer in Liquid Propellant Rocket Engine  

조남경 (한국항공우주연구원)
정용갑 (한국항공우주연구원)
문일윤 (한국항공우주연구원)
한영민 (한국항공우주연구원)
이수용 (한국항공우주연구원)
정상권 (한국과학기술원)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.6, no.4, 2002 , pp. 15-23 More about this Journal
Abstract
In most cryogenic liquid rocket engines, liquid oxygen manifold and injector are not thermally insulated from room temperature environment fur reducing system complexity and the weight. This feature of cryogenic liquid rocket engine results in the situation that cryogenic liquid oxygen flow is easy to be vaporized especially in the vicinity of the manifold and the injector wall. The research in this paper is focused on two-phase flow phenomena of liquid oxygen in rocket engine. Vapor fraction was estimated by comparing the measured two-phase flow pressure drop in engine manifold and the injector with ideal single phase pressure drop. Heat flux into cryogenic flow is estimated by measuring the wall temperature on the engine manifold to examine boiling characteristics. Suitable correlations for cryogenic two-phase flow were also reviewed to see their applicability. In addition, the effect of vapor generation in liquid rocket engine manifold and injector on engine performance and stability was considered.
Keywords
액체로켓엔진(Liquid Rocket Engine);비등(boiling);액체산소(Liquid Oxygen);건도(Quality);
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