Time-Resolved Particle Image Velocimetry (PIV) Measurements in a Radial Diffuser Pump
Time-Resolved Particle Image Velocimetry (PIV) Measurements in a Radial Diffuser Pump
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DOI：
10.1115/fedsm2009-78297
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Jianjun Feng;F. Benra;H. Dohmen
中科院分区：
文献类型：
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作者：
Jianjun Feng;F. Benra;H. Dohmen
采用时间分辨粒子图像测速技术（PIV）对低比转速径向扩压器泵级内的真实时变非定常流动进行了研究。对于设计条件和一些严重的部分负载条件，在叶片的中跨处进行测量。对不同叶轮通道间的瞬时流场进行了详细的分析和比较，并着重分析了部分负荷工况下的流动分离现象。对测量结果的分析表明，在某些部分负荷工况下，相邻叶轮通道的流动分离有很大差别。分离通常表现出双通道特性。版权所有© 2009 ASME
The truly time-variant unsteady flow in a low specific speed radial diffuser pump stage has been investigated by time-resolved Particle Image Velocimetry (PIV) measurements. The measurements are conducted at the midspan of the blades for the design condition and also for some severe part-load conditions. The instantaneous flow fields among different impeller channels are analyzed and compared in detail, and more attention has been paid to flow separations at part-load conditions. The analysis of the measured results shows that the flow separations at two adjacent impeller channels are quite different at some part-load conditions. The separations generally exhibit a two-channel characteristic.Copyright © 2009 by ASME