A Design Approach of Micro Partial Admission Impusle Turbine

For improving the current design method of micro partial admission impulse turbine, a design approach of the micro partial admission turbine is proposed by analyzing the micro turbine’s loss characteristics. In addition, the rationality of the design approach is examined numerically, the variable working conditions are investigated, and the prototype is designed. The results indicate that the error of the designed turbine’s inner efficiency between simulation results and the design parameters is less than 3%; the blade cascade and the shroud can suppress the flow separation at the nozzle’s outlet under a big ambient pressure; the impact loss on the blade cascade increases under off-designed rotational speeds; the turbine can gain larger output power by changing nozzle number. The design method can provide a reference for the optimization design and test of the micro turbine.