Based on the increasing-flow design method,the hydraulic design of small-flow high-head centrifugal-vortex pumps was presented,and the experimental study related to open-vortex impeller,complex-centrifugal impeller and inducer was also carried out on an HTB-5/60 model centrifugal-vortex test sample pump.

Optimizing design method for centrifugal impeller its engineering application and numerical simulation;

Numerical evaluation of inner flow passing low-speed centrifugal impeller;

Principles for selecting design factors of centrifugal impeller;

The effect of the contour of flow passage on gas-particle flow in centrifugal impeller;

The characteristic of the integrated impeller blade structure and its failure mode is presented.

Unsteady flow in centrifugal impeller has been measured by mean of PIV.

Numerical computation of inner flow passing through low specific speed compound impeller of centrifugal;

After an introduction to the operating principle and characteristics of the rotating jet pump, the design theory of the pump is emphatically expounded, and the method for calculating the structural parameters of its compound impeller with S-shaped blades is discussed.

Especially the flow of compound impeller in the centrifugal pump at low specific speed is more complex and has more problems need urgently to resolve.

Numerical analysis of flow features of a high-speed centrifugal pump with a complex impeller with multi-phase position;

The design principle of complex impeller of lowspecificspeed,lowtemperature and highspeed centrifugal pumps is derived according to relative velocity distribution in impeller channel.

To analyze the performance of high-speed centrifugal pumps with ultra-low specific-speed,numerical simulation of inner flow in centrifugal pump with ordinary impeller and complex impeller was conducted.