Summary

A wide range of waverider compression surfaces from axisymmetric non-conical bodies are evaluated. This permits the anhedral, semi-span to length ratio and fore and aft pressure distribution to be varied in a systematic way to improve the shape and the lift to drag ratio. Optimisation of the shape with an estimate for skin friction give guidence as to the desirable anhedral and semi-span to length ratio. An improvement in the equivalent lift to drag ratio of compression surfaces of over 10% is achieved. A practical example of a lower surface with a lift to drag ratio of 11.1 for a lift coefficiet of 0.057 at Mach 4 is presented. It is also found that volume can be added to this configuration near the nose such that the lift to drag ratio is not seriously degraded.

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Dec 2013