小型遠心ポンプのPIV計測

抄録

Flow conditions near the casing tongue have a significant impact on the performance and stable operation of the centrifugal pump, so the internal flow conditions have been measured by the experiment and PIV measurement. The internal flow conditions of mini centrifugal pumps especially smaller than 100mm are less measured by PIV measurement and its flow conditions near the casing tongue are not clarified yet. Therefore, PIV measurement was conducted near the casing tongue for the mini centrifugal pump having 55mm impeller diameter. The two-dimensional open impellers with different blade outlet angle were selected as the test impellers. FlowMaster Stereo-PIV by LaVision was used for the PIV measurement and the whole test section was made of the acrylic resin including the test impellers. The PIV measurement results at different flow rates were shown. In the present paper, the internal flow near the casing tongue is clarified by PIV measurement results and the flow conditions at the different flow rates are discussed.