Mechanisms for non-ideal flow in low-power arc-heated supersonic nozzles
文献类型：期刊论文
| 作者 | Wu, Cheng-Kang1; Pan, Wen-Xia1; Meng, Xian1; Wang, Hai-Xing2 ; Meng X(孟显); Pan WX(潘文霞); Wu CK(吴承康)
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| 刊名 | ACTA MECHANICA SINICA
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| 出版日期 | 2015-08-01 |
| 卷号 | 31期号:4页码:500-511 |
| 通讯作者邮箱 | ckw@imech.ac.cn |
| 关键词 | Arc-heated supersonic jet Low-power Real flow Viscosity effect Low Reynolds number |
| ISSN号 | 0567-7718 |
| 产权排序 | [Wu, Cheng-Kang; Pan, Wen-Xia; Meng, Xian] Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; [Wang, Hai-Xing] Beijing Univ Aeronaut & Astronaut, Sch Astronaut, Beijing 100191, Peoples R China |
| 通讯作者 | Wu, CK (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China. |
| 中文摘要 | The flow in a low-powered arc gas heater combined with a supersonic nozzle of throat diameter less than 1 mm is quite complicated and difficult to describe in quantitative detail. Experiments on arc-heated supersonic jet thrusters of monatomic gases argon and helium have been carried out and their performance measured. The flow characteristics are analyzed with the help of numerical simulation. Results show that the viscous effect is the most important factor causing the large difference between ideal and real performance. A large outer section of the exit flow is slow-moving. This is especially pronounced in helium, where 70 % of the exit area of the nozzle might be in subsonic flow. Friction forces can be much larger than the net thrust, reaching several times higher in helium, resulting in very low efficiencies. Other factors causing the differences between ideal and real flow include: complex flow in the throat region, electric arc extending to the nozzle expansion section, heat transfer to the inlet gas and from the hot plasma, and environmental pressure in the vacuum chamber. It is recognized that the ordinary concepts of supersonic nozzle flow must be greatly modified when dealing with such complicated situations. The general concepts presented in this paper could be helpful in guiding the design and operation of this equipment. |
| 英文摘要 | The flow in a low-powered arc gas heater combined with a supersonic nozzle of throat diameter less than 1 mm is quite complicated and difficult to describe in quantitative detail. Experiments on arc-heated supersonic jet thrusters of monatomic gases argon and helium have been carried out and their performance measured. The flow characteristics are analyzed with the help of numerical simulation. Results show that the viscous effect is the most important factor causing the large difference between ideal and real performance. A large outer section of the exit flow is slow-moving. This is especially pronounced in helium, where 70 % of the exit area of the nozzle might be in subsonic flow. Friction forces can be much larger than the net thrust, reaching several times higher in helium, resulting in very low efficiencies. Other factors causing the differences between ideal and real flow include: complex flow in the throat region, electric arc extending to the nozzle expansion section, heat transfer to the inlet gas and from the hot plasma, and environmental pressure in the vacuum chamber. It is recognized that the ordinary concepts of supersonic nozzle flow must be greatly modified when dealing with such complicated situations. The general concepts presented in this paper could be helpful in guiding the design and operation of this equipment. |
| 分类号 | 二类 |
| 类目[WOS] | Engineering, Mechanical ; Mechanics |
| 研究领域[WOS] | Engineering ; Mechanics |
| 关键词[WOS] | THRUSTERS ; DEPOSITION |
| 收录类别 | SCI |
| 原文出处 | http://dx.doi.org/10.1007/s10409-015-0430-9 |
| 语种 | 英语 |
| WOS记录号 | WOS:000360540200007 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/55775]  |
| 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.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China 2.Beijing Univ Aeronaut & Astronaut, Sch Astronaut, Beijing 100191, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Cheng-Kang,Pan, Wen-Xia,Meng, Xian,et al. Mechanisms for non-ideal flow in low-power arc-heated supersonic nozzles[J]. ACTA MECHANICA SINICA,2015,31(4):500-511. |
| APA | Wu, Cheng-Kang.,Pan, Wen-Xia.,Meng, Xian.,Wang, Hai-Xing.,Meng X.,...&Wu CK.(2015).Mechanisms for non-ideal flow in low-power arc-heated supersonic nozzles.ACTA MECHANICA SINICA,31(4),500-511. |
| MLA | Wu, Cheng-Kang,et al."Mechanisms for non-ideal flow in low-power arc-heated supersonic nozzles".ACTA MECHANICA SINICA 31.4(2015):500-511. |
入库方式： OAI收割
来源：力学研究所
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