Experimental Study of the Swirling Flow in the Volute of a Centrifugal Pump
Experimental Study of the Swirling Flow in the Volute of a Centrifugal Pump
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DOI：
10.1115/1.2929153
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发表时间：
1990-06
影响因子：
1.7
通讯作者：
T. Elholm;E. Ayder;R. Braembussche
中科院分区：
文献类型：
--
作者：
T. Elholm;E. Ayder;R. Braembussche
利用激光多普勒测速仪（LDV）测量了蜗壳在设计工况和非设计工况下两种不同周向截面上的三维速度分布。结果表明，旋流器内的速度分布为前涡型，旋流中心位置随流量的变化而变化。通流速度分布主要由角动量守恒定义。观察到通流和旋流速度之间的强烈相互作用。舌部区域的流动显示显示，随着质量流量的增加，蜗壳入口处的速度发生逆转
Detailed three-dimensional velocity distributions, corresponding to design and off-design operation, were measured in two differnt circumferential cross sections of a volute by means of LDV. It is shown that the swirl has a foreced vortex type velocity distribution and that the location of the swirl center changes with mass flow. The throughflow velocity distribution is primarily defined by the conservation of angular momentum. A strong interaction between the throughflow and swirl velocity is observed. Flow visualization in the tongue region reveals a reversal of the velocity at the volute inlet with increasing mass flow