Mechanism of unsteady aerodynamic heating with sudden change in surface temperature
文献类型：期刊论文
| 作者 | Chen, Hao; Bao, Lin |
| 刊名 | Applied mathematics and mechanics-english edition
 |
| 出版日期 | 2009-02-01 |
| 卷号 | 30期号:2页码:163-174 |
| 关键词 | Unsteady aerodynamic heating Hypersonic Unsteady surface temperature Approximate analysis Numerical simulation |
| ISSN号 | 0253-4827 |
| DOI | 10.1007/s10483-009-0204-3 |
| 通讯作者 | Bao, lin(lbao@gucas.ac.cn) |
| 英文摘要 | The characteristics and mechanism of unsteady aerodynamic heating of a transient hypersonic boundary layer caused by a sudden change in surface temperature are studied. the complete time history of wall heat flux is presented with both analytical and numerical approaches. with the analytical method, the unsteady compressible boundary layer equation is solved. in the neighborhood of the initial and final steady states, the transient responses can be expressed with a steady-state solution plus a perturbation series. by combining these two solutions, a complete solution in the entire time domain is achieved. in the region in which the analytical approach is applicable, numerical results are in good agreement with the analytical results, showing reliability of the methods. the result shows two distinct features of the unsteady response. in a short period just after a sudden increase in the wall temperature, the direction of the wall heat flux is reverted, and a new inflexion near the wall occurs in the pro. le of the thermal boundary layer. this is a typical unsteady characteristic. however, these unsteady responses only exist in a very short period in hypersonic flows, meaning that, in a long-term aerodynamic heating process considering only unsteady surface temperature, the unsteady characteristics of the flow can be ignored, and the traditional quasi-steady aerodynamic heating prediction methods are still valid. |
| WOS关键词 | LAMINAR BOUNDARY-LAYER ; FLAT-PLATE ; FORCED-CONVECTION ; FLOW ; WEDGE ; FLUX |
| WOS研究方向 | Mathematics ; Mechanics |
| WOS类目 | Mathematics, Applied ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:000263058100004 |
| 出版者 | SHANGHAI UNIV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2403063 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Bao, Lin |
| 作者单位 | Chinese Acad Sci, Grad Univ, Aerodynam Lab, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Hao,Bao, Lin. Mechanism of unsteady aerodynamic heating with sudden change in surface temperature[J]. Applied mathematics and mechanics-english edition,2009,30(2):163-174. |
| APA | Chen, Hao,&Bao, Lin.(2009).Mechanism of unsteady aerodynamic heating with sudden change in surface temperature.Applied mathematics and mechanics-english edition,30(2),163-174. |
| MLA | Chen, Hao,et al."Mechanism of unsteady aerodynamic heating with sudden change in surface temperature".Applied mathematics and mechanics-english edition 30.2(2009):163-174. |
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来源：中国科学院大学
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