パラメトリックモデリングCFD解析を利用したダクテッドファンの最適形状設計

抄録

The shape of a ducted fan mainly used under hovering condition was optimized using parametric modeling CFD analysis. Parametric CAD modeling was used to generate the shape of the fan and duct using multiple parameters, and it was combined with automatic meshing and automatic CFD optimization method. As a result, it was shown that the thrust of optimized shape under hovering condition was higher than that of baseline. And at the same time, the side drag force of optimized shape under crosswind condition was lower than that of baseline. The obtained optimized design has a thick lip shape which reduces the curvature of leading edge of duct and reduces separation region under crosswind condition. It is clear that the design concept of the ducted fan mainly for hovering operation condition is quite different from that of the ducted fan mainly for cruising operation in general aero engines.