Size of annular separation bubble around the inlet corner and viscous flow structure between two parallel disks
Size of annular separation bubble around the inlet corner and viscous flow structure between two parallel disks
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DOI：
10.1007/s00348-001-0370-y
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发表时间：
2002-04
影响因子：
2.4
通讯作者：
K. Nakabayashi;T. Ichikawa;Y. Morinishi
中科院分区：
文献类型：
--
作者：
K. Nakabayashi;T. Ichikawa;Y. Morinishi
采用流动可视化和数值模拟的方法研究了进口转角的环形分离泡和两个平行盘之间的径向流动，以了解进口区域轴对称分离和再附着的特征。对于有尖角的情况，再附点的半径仅取决于间隙比，而与雷诺数无关，在湍流状态下，再附点是随机波动的。圆角情况下，再附着点半径和气泡高度随圆角度的增大而减小。
The annular separation bubble around the inlet corner and the radial flow between two parallel disks were investigated by means of flow visualization and numerical simulations to gain an understanding of the features of axisymmetric separation and reattachment in the inlet region. For the case with a sharp corner, the radius of the reattachment point depends only on clearance ratio, independent of Reynolds number in the turbulent flow regime where the reattachment point fluctuates randomly. For the cases with a rounded corner, the radius of reattachment point and the height of the bubble decrease with increasing corner roundness.