依据旋流流场PIV测试结果，研究设计流量的切向速、速度矩的径向分布，提

The speed, velocity moment swirler radial distribution by PIV based on the results, study design tangential flow, the Reynolds number calculation method is proposed wherein the cutting speed and wherein the swirl velocity moment mathematical model, a moment characteristic velocity and the impeller exit velocity relationship moment, the inner contact structures swirling flow characteristics of the impeller exit velocity triangle. In the differential rotating jet pump, according to the calculation results and numerical piezometric load,

Based on the test results of the pIV of the swirling flow field, the radial distribution of the cutting speed and velocity moment of the design flow is studied, the calculation method and the speed moment mathematical model of the characteristic tangent speed and the characteristic cyclone Reynolds number are proposed, the relationship between the characteristic velocity moment and the impeller outlet speed moment is established, and the intrinsic relation between the swirl flow characteristic and the impeller outlet velocity triangle is constructed. On the differential rotary pump, the results are calculated according to the pressure tube and the numerical values.

According to the PIV test results of swirl flow field, the tangential velocity and radial distribution of velocity moment of design flow are studied, the calculation method of characteristic tangential velocity and characteristic swirl Reynolds number and mathematical model of velocity moment are proposed, the relationship between characteristic velocity moment and impeller outlet velocity moment is established, and the internal relationship between swirl flow characteristics and impeller outlet velocity triangle is built. On the differential jet pump, according to the piezometric pipe pressure and numerical calculation results,