A method Study on Unfolded of Practical Wind Tunnel Contraction Stages of Witozinsky Curve

The method of unfolding contraction stages-Witozinsky curve is proposed.The method combines three dimensional CAD and the programming to obtain simply,accurately and conveniently the contraction section of unfolded sample.Compared with the conventional approach,the method proposed is closer the mathematical model,and causes the flow field turbulence non-uniformity to be lower and airflow uniformity to be better.