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首页> 外文会议>The Fourth International Conference on Pumps and Fans (4th ICPF) Aug 26-29, 2002 Beijing, China >LDV MEASUREMENT IN THREE DIMENSIONAL FLOW FIELD OF AN AXIAL FAN
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LDV MEASUREMENT IN THREE DIMENSIONAL FLOW FIELD OF AN AXIAL FAN

机译：轴流风机三维流场的LDV测量

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摘要

The three-dimensional flow field of the axial fan rotor is acquired using a PDA system (Particle Doppler Anemometer, DANTEC Measurement Technology). The detailed flow field measurements are taken at 15 axial locations upstream, inside and downstream of the rotor with a tip clearance. In the radial direction, the measurements are focused on the tip region between the 90% of the blade span and the casing wall. The measurement result is presented by plots of three dimensional streamlines, velocity vectors and velocity contours. The following phenomenon is clearly investigated in the experiment. In the tip region of the rotor, the tip leakage flow induced by the pressure difference between the suction and pressure sides of the blade is further complicated by the rotation of the blade. The axially reversed flow in the tip region is originated from the tip leakage flow, which reduces the overall mass transport and increases the blockage in the blade passage. More available flow phenomenon will be present in the paper.
机译：使用PDA系统（颗粒多普勒风速计，DANTEC Measurement Technology）获取轴流风机转子的三维流场。详细的流场测量是在转子的上游，内部和下游的15个轴向位置进行的，具有尖端间隙。在径向方向上，测量结果集中在叶片跨度的90％和壳体壁之间的尖端区域。测量结果由三维流线图，速度矢量和速度轮廓图表示。实验中清楚地调查了以下现象。在转子的尖端区域中，由叶片的吸入侧和压力侧之间的压力差引起的尖端泄漏流由于叶片的旋转而变得更加复杂。尖端区域中的轴向反向流动源自尖端泄漏流，这减少了整体质量传输并增加了叶片通道中的阻塞。本文中将出现更多可用的流动现象。

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