| 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.
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| Source Publication | Acta Astronautica
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| 2013-10 | |
| Volume | 91Pages:218-227 |
| ISSN | 0094-5765 |
| Abstract | 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. |
| Keyword | Rarefied Jet Flows Jets And Bursts Collisionless Discharge In Vacuum |
| Subject Area | 稀薄气体力学 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000323585800025 |
| Funding Organization | New Mexico Space Grant; [NSF-DMS-0914706]; [NSF-CBET-0854411] |
| Department | LHD微尺度和非平衡流动 |
| Classification | 二类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/47446 |
| Collection | 高温气体动力学国家重点实验室 |
| Corresponding Author | 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. |
| 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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