01.2 - Aircraft Design and Integrated System (Applications)
DUAL-STREAM JET NOISE TEST WITH INTERNAL MIXER DESIGN VARIATIONS FOR LTO NOISE OF SUPERSONIC AIRCRAFT
R. Habing¹, M.-J. Van der Meulen¹, M. Huet, ONERA / DAAA, France; R. Jaron, DLR, Germany; F. Petrosino², M. Barbarino², O. Zaporozhets, Institute of Aviation, Poland; ¹NLR, Netherlands ;²CIRA, Italy
One of the challenges of designing future commercial supersonic aircraft is accurate prediction and reduction of landing and takeoff (LTO) noise. It is expected that jet noise is a dominant noise source during LTO. In the present study a small-scale acoustic jet noise test has been designed and performed. The model contains a dual-stream nozzle including an external plug and has a modular design to vary nozzle length and internal mixers designs. An acoustic test in an anechoic environment with a sideline microphone array has been performed for a range of nozzle pressure ratios. The effect of mixer and lobes and nozzle length on the jet noise characteristics has been evaluated.