Supercritical GN2/GH2 jet modeled by the ECS method

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Supercritical GN2/GH2 jet modeled by the ECS method
	Yao W(姚卫); Jin YC(靳一超); Lee YC(李亚超)
	2019
会议日期	August 19, 2019 - August 22, 2019
会议地点	Indianapolis, IN, United states
英文摘要	In the framework of large eddy simulation, a supercritical GN2/GH2 jet has been modeled by using the ECS method, whose accuracy has been verified for a binary N2/H2 mixture against the standard data. A hydrid pressure/density solver is developed to model the high-speed flow caused by the sudden volume expansion of a heated flow in case of the stiff phase-change phenomenon. Grid convergence study was conducted for mesh resolutions from 9.6 to 20.02 million cells. In comparison with the experimental data, the current prediction overpredicts the potential core of the nitrogen jet, while agrees better in the fully mixing region. A waist-like region can be identified as a relatively higher density overlaid on a lower density region, which is observed to be not an instantaneous phenomenon. A mushroom-cap region is formed when the thermal expansion rate of nitrogen jet has a sudden increase due to the breakup of the jet potential core. The drastic expansion obviously increases transverse velocity, which causes an obvious increase in the width of the jet flow. The streamlines indicate that the flow turns transversely at the location corresponding to the sudden expansion region, and it is the backflow causes the shrinking waist-like region. © 2019, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
会议录	AIAA Propulsion and Energy Forum and Exposition, 2019
语种	英语
URL标识	查看原文
ISBN号	9781624105906
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/85098]
专题	力学研究所_高温气体动力学国家重点实验室
作者单位	1.School of Engineering Science, University of Chinese Academy of Science, Beijing, 100049, China 2.Key Laboratory of High-Temperature Gas Dynamics, Institute of Mechanics, CAS, Beijing, 100190, China
推荐引用方式 GB/T 7714	Yao W,Jin YC,Lee YC. Supercritical GN2/GH2 jet modeled by the ECS method[C]. 见:. Indianapolis, IN, United states. August 19, 2019 - August 22, 2019.