Laminarization of Turbulent Flow in the Inlet Region of an Axially Rotating Pipe : Fluids Engineering
Laminarization of Turbulent Flow in the Inlet Region of an Axially Rotating Pipe : Fluids Engineering
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轴向旋转管道入口区域的湍流层流：流体工程
DOI：
10.1299/jsme1987.30.255
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
M. Murakami
中科院分区：
文献类型：
--
作者：
K. Nishibori;K. Kikuyama;M. Murakami
本文描述了在轴向旋转管内引入充分发展的湍流时，管内流动的层压化现象。旋转边界层最初受到旋转速度分量产生的离心力的强烈稳定，导致流动层压化。这种流动层压化现象在管道段存在非旋转内芯的进口区域更为显著。流场可视化技术的应用也证实了层压化后的流场在流向下游时趋于不稳定，并出现了湍流的爆发。
This paper describes the laminarization phenomenon of the flow in an axially rotating pipe when a fully developed turbulent flow is introduced into it. The rotating boundary layer is initially strongly stabilized by the centrifugal force due to the rotating velocity component, resulting in a laminarization of flow. This flow laminarization has been found to be more remarkable in the inlet region where a non-rotating inner core exists in the pipe section. The laminarized flow tends to be unstable as the flow goes downstream, and bursts of turbulence appear, which was also confirmed by the use of a flow visualization technique.