Abstract
Effects on adiabatic efficiency of meridional dimensions for radial inflow turbine impeller were investigated. Following Taguchi method, 8 meridional dimensions were selected as control parameters, and 2 or 3 levels were considered to each parameter. The second level was fixed the dimensions of present turbine impeller. Adiabatic efficiencies were calculated by using commercial softwares. Accuracy of the predictions which were carried out by those softwares had been improved by adjusting multipliers of loss models to reflect the experimental results. As the results, the most sensitive meridional dimension to achieve high adiabatic efficiency was impeller outlet tip diameter. It can be concluded that the reduction of both exit kinetic energy and friction loss was the most effective to design for high efficiency radial inflow turbine.
