Abstract
A new system for measuring the location of shock wave on an airfoil in transonic flow has been developed. This consists of a schliern optical system, a solid state linear image sensor as detector, video signal gathering unit and a micro computer. Using this system, the behaviour of shock wave fluctuating with high frequency on a airfoil such as the instantaneous location, the frequency and the amplitude can be measured with ease, which have otherwise been very difficult and toublesome to measure.
