Abstract
The authors carried out the experiments on a regenerative pump systematically, changing the dimensions of flow channels, impellers and clearances. And they propose a dimension of flow for a parameter. Then the following results are obtained through above experiments. (1) The influence of the clearances on the pump performance depends on the characteristic dimension of flow channel. The allowable clearance is decided by the value of the characteristic dimension of flow channel. (2) The pump efficiency is high in the adequate range of impeller dimension and characteristic dimension of flow channel. (3) The influence of number of vanes on the pump performance depends on the width ratio of vane. (4) The pump performance depends on the combinations of characteristic dimension of flow channel, width ratio, thickness and length of vane. (5) The upper and lower limits of characteristic dimension of flow channel are fixed by the values of clearance and dimension of impeller.
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