C124 CFD による斜め楕円翼の超音速空力性能の検証と最適化

概要

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An Oblique Flying Wings (OFW) was simulated to analyze the aerodynamic performance and started to design using an inverse problem solver. An OFW is a wing of elliptic planform having minimum wave drag at transonic and supersonic speeds up to M=1.4. In our simulation, the maximum lift to drag ratio (L/D) was 20.44 at Mach 1.414 and angle of attack 0.75. In this case, a shock wave did not appear to 70% span, because flow in the chord direction became a subsonic by the effect of the sweep angle. However a strong shock wave was confirmed more than 70% span in the downstream. We tried to remove this shock wave to improve flight performance with wing shape optimization. For optimization, an inverse problem solver has been used with which the determination of the target pressure coefficient was important.
日本流体力学会の論文
2002-07-23