Authors: Changjin Lee TaeSeong Roh
Publish Date: 2009/06/28
Volume: 23, Issue: 3, Pages: 643-649
Abstract
Flow instability in LRE liquid rocket engine occurs due to various reasons such as flow interactions with valve orifice and venturi etc The inception of cavitation especially in the propellant feeding system is the primary cause of mass and pressure oscillations because of the cyclic formation and depletion of cavitation Meanwhile the main propellant in a liquid rocket engine is the cryogenic fluid which properties are very sensitive to temperature variation And the change of propellant properties to temperature variation by thermodynamic effect needs to be properly taken into account in the flow analysis in order to understand basic mechanisms for cryogenic cavitation The present study focuses on the formation of cryogenic cavitation by using the IDM model suggested by Shyy and coworkers The flow instability was also numerically investigated in the downstream of orifice with a developed numerical code Calculation results show that cryogenic cavitation can be a primary source of flow instability leading to mass fluctuations accompanied by pressure oscillations The prediction of cavitation in cryogenic fluid is of vital importance in designing a feeding system of an LREChangjin Lee received his BS and MS degrees in Aeronautical Engineering from Seoul National University in 1983 and 1985 He then went on to receive his PhD degree from University of Illinois at Urbana Champaign in 1992 Dr Lee is currently a Professor at the department of Aerospace Engineering at Konkuk University in SEOUL Korea His research interests are in the area of combustion instabilities of hybrid liquid rocket and jet propulsionsTaeSeong Roh received his BS and MS degrees in Aeronautical Engineering from Seoul National University in 1984 and 1986 He then went on to receive his PhD degree from Pennsylvania State University in 1995 Dr Roh is currently a Professor at the department of Aerospace Engineering at Inha University in Incheon Korea His research interests are in the area of combustion instabilities rocket and jet propulsions interior ballistics and gas turbine engine defect diagnostics
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