涉猎 & 无尽
- Shock waves in supersonic flow create a new source of drag called wave drag.
- To minimize the strength of the shock wave, all supersonic airfoil profiles are thin, with respect relatively sharp leading edges.
- Total drag = Skin friction drag + Pressure drag (due to flow separation) + wave drag (only for transonic and supersonic speeds)
- Skin friction drag + Pressure drag called Profile Drag