After the state-of-the-art investigations into low specific speed submersible sewage pumps were reviewed,it was found that the studies mainly focused on numerical calculations,while there is a lack of internal flow field visualization investigations.Therefore,the internal flow field in a submersible sewage pump with specific speed of 60 was measured by means of a 2D-PIV under different operating conditions to reveal the flow structure and development in the impeller from the inlet to the outlet.The pump ori...
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