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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.
Source PublicationActa Astronautica
2013-10
Volume91Pages:218-227
ISSN0094-5765
AbstractThis 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.
KeywordRarefied Jet Flows Jets And Bursts Collisionless Discharge In Vacuum
Subject Area稀薄气体力学
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000323585800025
Funding OrganizationNew Mexico Space Grant; [NSF-DMS-0914706]; [NSF-CBET-0854411]
DepartmentLHD微尺度和非平衡流动
Classification二类
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47446
Collection高温气体动力学国家重点实验室
Corresponding AuthorCai, 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.
Recommended Citation
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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