Acoustic wave propagation through the shear layer of the DNW large open jet wind tunnel

The German-Dutch Wind Tunnel (DNW) in aeroacoustic mode, consists of a 20 m long open jet, surrounded by a large anechoic room. Sound waves from a model have to cross the shear layer of the jet to reach the microphones outside the flow. The acoustic correction procedures for 1/3 octave analysis were checked with a calibrated noise source using...