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Tip Vortex and Wake Characteristics of a Counterrotating Open RotorOne of the primary noise sources for Open Rotor systems is the interaction of the forward rotor tip vortex and blade wake with the aft rotor. NASA has collaborated with General Electric on the testing of a new generation of low noise, counterrotating Open Rotor systems. Three-dimensional particle image velocimetry measurements were acquired in the intra-rotor gap of the Historical Baseline blade set. The velocity measurements are of sufficient resolution to characterize the tip vortex size and trajectory as well as the rotor wake decay and turbulence character. The tip clearance vortex trajectory is compared to results from previously developed models. Forward rotor wake velocity profiles are shown. Results are presented in a form as to assist numerical modeling of Open Rotor system aerodynamics and acoustics.
Document ID
20120018036
Acquisition Source
Glenn Research Center
Document Type
Presentation
Authors
Van Zante, Dale E. (NASA Glenn Research Center Cleveland, OH, United States)
Wernet, Mark P. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 25, 2013
Publication Date
July 29, 2012
Subject Category
Aerodynamics
Report/Patent Number
E-18418-1
Meeting Information
Meeting: 48th AIAA Joint Propulsion Conference
Location: Atlanta, GA
Country: United States
Start Date: July 30, 2012
End Date: August 1, 2012
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 699959.02.09.03.05
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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