Analytical exact solutions for unsteady collisionless plume flows in a vacuum

	Analytical exact solutions for unsteady collisionless plume flows in a vacuum
	Cai C; Sun QH(孙泉华); Vanderwyst A; Cai, C (reprint author), New Mexico State Univ, Dept Mech & Aerosp Engn, Jett Hall 515,1040 S Horseshoe Dr,MSC 3450, Las Cruces, NM 88003 USA.
发表期刊	Acta Astronautica
	2013-10
卷号	91 页码:218-227
ISSN	0094-5765
摘要	This paper presents a set of gaskinetic solutions to the problem of unsteady collisionless round plume development: startup and development to a steady flow; steady flow; and shutting down from a steady flow. This can find applications in studying similar transient plume flows from space propulsion devices. Different from many past studies, here we consider the general situation that the average exit gas speed can be larger than zero, and detailed geometry of the nozzle exit radius is included. A fundamental space velocity time relation is adopted in this study and it plays a crucial role to obtain the complete flowfield properties of density, velocity, pressure and temperature. This study reveals that there are some internal complementary relations on density and momentum among these three processes. The results involve complex integrations involving factors of time, geometry, and specific speed ratio. Several numerical simulations with the direct simulation Monte Carlo method validate these analytical exact results.
关键词	Rarefied Jet Flows Jets And Bursts Collisionless Discharge In Vacuum
学科领域	稀薄气体力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000323585800025
项目资助者	New Mexico Space Grant; [NSF-DMS-0914706]; [NSF-CBET-0854411]
课题组名称	LHD微尺度和非平衡流动
论文分区	二类
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/47446
专题	高温气体动力学国家重点实验室
通讯作者	Cai, C (reprint author), New Mexico State Univ, Dept Mech & Aerosp Engn, Jett Hall 515,1040 S Horseshoe Dr,MSC 3450, Las Cruces, NM 88003 USA.
推荐引用方式 GB/T 7714	Cai C,Sun QH,Vanderwyst A,et al. Analytical exact solutions for unsteady collisionless plume flows in a vacuum[J]. Acta Astronautica,2013,91:218-227.
APA	Cai C,孙泉华,Vanderwyst A,&Cai, C .(2013).Analytical exact solutions for unsteady collisionless plume flows in a vacuum.Acta Astronautica,91,218-227.
MLA	Cai C,et al."Analytical exact solutions for unsteady collisionless plume flows in a vacuum".Acta Astronautica 91(2013):218-227.

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