schlieren S

Multi-Colour Schlieren Optics

With the help of the Schlieren technique, flows of transparent media can be visualized by taking advantage of the changes in the refractive index distribution. The refractive index allows to draw a conclusion about density, temperature, and pressure of the medium.

A 4-colour Schlieren system with a focal length of 4 meters is applied at the Trisonic Wind Tunnel. As an illumination source a 1.6 kW xenon lamp is used.


Schlieren visualization of an over-expended thrust-optimized nozzle of a generic space launcher model.