Initial Investigation of the Acoustics of a Counter Rotating Open Rotor Model With Historical Baseline Blades in a Low Speed Wind Tunnel

David Elliott
2011 17th AIAA/CEAS Aeroacoustics Conference (32nd AIAA Aeroacoustics Conference)   unpublished
A counter-rotating open rotor scale model was tested in the NASA Glenn Research Center 9-by 15-Foot Low-Speed Wind Tunnel (LSWT). This model used a historical baseline blade set with which modern blade designs will be compared against on an acoustic and aerodynamic performance basis. Different blade pitch angles simulating approach and takeoff conditions were tested, along with angle-ofattack configurations. A configuration was also tested in order to determine the acoustic effects of a pylon.
more » ... he shaft speed was varied for each configuration in order to get data over a range of operability. The freestream Mach number was also varied for some configurations. Sideline acoustic data were taken for each of these test configurations.
doi:10.2514/6.2011-2760 fatcat:m5g3ogc46bclrk3zqivhuzhqi4