Abstract
The supersonic free-vortex aerodynamic laser window is one of key technologies for extracting a laser beam from the laser cavity. This paper describes an experimental study on gasdynamic performance of aerodynamic window. Schlieren flow visualization captured oblique shock on the nozzle exit edge and shear layer on the free-vortex, between the atmosphere and the cavity. Inner diameter side flow velocity is faster than outer side has been clarified by PIV measurement.
