Aerodynamic design of micro radial inflow turbine with wall heat transfer

The heat transfer effect is a significant difference between the micro radial inflow turbine and the conventional radial inflow turbine, so it is very important to take the wall heat transfer effect into consideration when designing a micro radial inflow turbine. Based on the feature of non-adiabatic wall in the micro radial inflow turbine, and through theoretical analysis, a velocity diagram analytical model was obtained preliminarily. On that basis, the aerodynamic design method of the micro radial inflow turbine was developed. Then the design rule of the micro radial inflow turbine considering wall heat transfer effect was summarized. Finally a three-dimensional numerical simulation was carried out to verify the obtained model and design method. Results show that the model and design method of the micro radial inflow turbine considering wall heat transfer effect is feasible.