Boundary-layer transition on a rotating cone in still fluid
Boundary-layer transition on a rotating cone in still fluid
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DOI：
10.1017/s0022112083002761
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发表时间：
1983-02
影响因子：
3.7
通讯作者：
R. Kobayashi;H. Izumi
中科院分区：
文献类型：
--
作者：
R. Kobayashi;H. Izumi
本文对静止流体中绕对称轴作等速旋转的圆锥表面诱导的三维不可压边界层的层流-湍流转捩进行了线性稳定性分析和实验研究。试验了5个总角度为30° ~ 150 °的锥体。结果表明，随着锥角的增大，临界雷诺数、转捩雷诺数、转捩区螺旋涡的方向以及锥上螺旋涡的数量均增大，并趋于旋转圆盘情况下的数值。对转捩过程和螺旋涡横截面流动进行了流动显示。
A linear stability analysis and experiments were carried out for the laminar–turbulent transition of three-dimensional incompressible boundary layers induced on the surface of a cone rotating around the axis of symmetry with constant angular speed in still fluid. Five cones having total angle of 30°–150° were tested. The results show that the critical and transition Reynolds numbers, the direction of spiral vortices appearing in the transition region and their number on a cone increase as the cone angle is increased, and they tend to the values for the case of a rotating disk. Flow visualizations were made for the transitional process and also for cross-sectional flows of spiral vortices.