Boundary-Layer Transition on Broad Cones Rotating in an Imposed Axial Flow
Boundary-Layer Transition on Broad Cones Rotating in an Imposed Axial Flow
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DOI：
10.2514/1.j050021
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发表时间：
2010-06-01
期刊：
影响因子：
2.5
通讯作者：
Stephen, S. O.
中科院分区：
文献类型：
--
作者：
Garrett, S. J.;Hussain, Z.;Stephen, S. O.
本文给出了宽锥（半角psi > 40 °）在轴向流中旋转时边界层流动的稳定性分析。初步对流不稳定性分析的基础上的奥尔-索末菲方程的各种轴向流速。根据有限的现有实验数据和以前对相关机构的稳定性分析，对结果进行了讨论。本文还介绍了绝对不稳定性分析的结果，其目的是进一步发展加勒特和皮克[加勒特，S. J.，和Peake，N.，“旋转圆锥体上边界层的绝对不稳定性”，《欧洲力学杂志》，B/Fluids，第263卷，2007年，第100页。344-353.]通过使用一个更严格的稳定如何制定。轴向流被认为是延迟对流和绝对不稳定性的发病。
This paper presents stability analyses for the boundary-layer flow over broad cones (half-angle psi > 40 degrees) rotating in imposed axial flows. Preliminary convective instability analyses are presented that are based on the Orr- Sommerfeld equation for a variety of axial-flow speeds. The results are discussed in terms of the limited existing experimental data and previous stability analyses on related bodies. The results of an absolute-instability analysis are also presented which are intended to further those by Garrett and Peake [Garrett, S.J., and Peake, N., "The Absolute Instability of the Boundary Layer on a Rotating Cone," European Journal of Mechanics, B/Fluids, Vol. 263, 2007, pp. 344-353.] through the use of a more rigorous steady-How formulation. Axial flow is seen to delay the onset of both convective and absolute instabilities.