Flows of water in a centrifugal pump impeller with large blade discharge angle and small wrap angle are measured by using two-dimensional laser Doppler velocimeter systematically and accurately in the best efficiency and part-loading points,respectively.the results hsow that the wake cna be found near shroud/suction corner and the jet does not exist near blade pressure side.The wake will be enlarged as pump operation point varying from the best efficiency point to the part-loading one.The flow construction in the impeller does not conform the well-known jet/wake flow model.The distribution of specific absolute energy of fluid particle is not uniform against the impeller width,an the fluid with low specific absolute energy is located at the hub/suction corner.
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机译:通过在最佳效率和部分加载点中使用二维激光多普勒速度计量,通过使用二维激光多普勒速度计测量具有大刀片放电角度和小套角角度的离心泵叶轮流量。结果Hsow唤醒CNA是在护罩/抽吸角附近发现,喷射器不存在叶片压力侧不存在。唤醒将被扩大为泵操作点从最佳效率点变化到部分装载一体。叶轮的流动结构不符合井 - Known Jet / Wake Flow模型。液体颗粒的特定绝对能量的分布不均匀,叶轮宽度不均匀,具有低特异性绝对能量的流体位于轮毂/抽吸角处。
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