軸流反転ファンの超音速領域における効率特性に関する研究

抄録

Axial Counter Rotating Fan is the technology that can obtain a high pressure ratio and high mass flow rate compared to a normal axial fan. However, there is no example that has been put into practical use because the adiabatic efficiency decreases in the supersonic region. Therefore, in this research, improvement of the adiabatic efficiency reduction phenomenon in the supersonic region is the final objective. Numerical analysis was carried out using ANSYS CFX. As a result, the efficiency characteristics in the region where the relative speed of the first stage fan and the second stage fan reaches supersonic speed are clarified.