For an air turbine with high loading

low rotational speed and greater torque output single-stage startup

aerodynamic analysis of prototype and aerodynamic modification design were conducted for achieving a more powerful shaft-power output.This turbine employed a centrifugal flow path

discrete nozzles and an impactive rotor.The flowfield analysis indicates that

this turbine has a very high loading coefficient

rather than a high adiabatic efficiency.Atechnical package was adopted in the modification design of increasing mass flow with almost the same turbine inlet total pressure.The flowfield simulation indicates that

when the rotor′s diameter is reduced to 94% of the original turbine

the power output of the modified turbine is about 2 times and 2.8 times of the original one at both the rotational speed of 100% and 140% of the original one.