| Effects of wall temperature on boundary layer stability over a blunt cone at Mach 7.99 |
| Liang X(梁贤) ; Li XL(李新亮); Fu DX(傅德薰); Ma YW(马延文); 梁贤,李新亮
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| 发表期刊 | Computers & Fluids
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| 2010
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| 卷号 | 39期号:2页码:359–371 |
| ISSN | 0045-7930
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| 摘要 | Effects of wall temperature on stabilities of hypersonic boundary layer over a 7-degree half-cone-angle blunt cone are studied by using both direct numerical simulation (DNS) and linear stability theory (LST) analysis. Four isothermal wall cases with Tw/T0= 0.5, 0.7, 0.8 and 0.9, as well as an adiabatic wall case are considered. Results of both DNS and LST indicate that wall temperature has significant effects on the growth of disturbance waves. Cooling the surface accelerates unstable Mack II mode waves and decelerates
the first mode (Tollmien–Schlichting mode) waves. LST results show that growth rate of the most unstable Mack II mode waves for the cases of cold wall Tw/T0=0.5 and 0.7 are about 45% and 25% larger than that for the adiabatic wall, respectively. Numerical results show that surface cooling modifies the profiles of rdut/dyn and temperature in the boundary layers, and thus changes the stability haracteristic
of the boundary layers, and then effects on the growth of unstable waves. The results of DNS indicate that the disturbances with the frequency range from about 119.4 to 179.1 kHz, including the most unstable Mack modes, produce strong mode competition in the downstream region from about 11 to 100 nose radii. And adiabatic wall enhances the amplitudes of disturbance according to the results of DNS,
although the LST indicates that the growth rate of the disturbance of cold wall is larger. That because the growth of the disturbance does not only depend on the development of the second unstable mode. |
| 学科领域 | 流体力学
; 流动的稳定性
; 湍流
; 计算流体力学
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| DOI | 10.1016/j.compfluid.2009.09.015
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| 收录类别 | SCI
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| 语种 | 英语
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| WOS记录号 | WOS:000272404900016
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| 关键词[WOS] | DIRECT NUMERICAL-SIMULATION
; STREAM DISTURBANCE WAVES
; FLAT-PLATE
; HYPERSONIC FLOW
; RECEPTIVITY
; TRANSITION
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| WOS研究方向 | Computer Science
; Mechanics
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| WOS类目 | Computer Science, Interdisciplinary Applications
; Mechanics
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/28800
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| 专题 | 非线性力学国家重点实验室
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| 通讯作者 | 梁贤,李新亮 |
推荐引用方式
GB/T 7714 |
Liang X,Li XL,Fu DX,et al. Effects of wall temperature on boundary layer stability over a blunt cone at Mach 7.99[J]. Computers & Fluids,2010,39,2,:359–371.
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| APA |
梁贤,李新亮,傅德薰,马延文,&梁贤,李新亮.(2010).Effects of wall temperature on boundary layer stability over a blunt cone at Mach 7.99.Computers & Fluids,39(2),359–371.
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| MLA |
梁贤,et al."Effects of wall temperature on boundary layer stability over a blunt cone at Mach 7.99".Computers & Fluids 39.2(2010):359–371.
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