Helicopter rotor induced velocities theory and experimentAn investigation has been performed to assess methods used for rotor inflow modeling. A key element of this assessment has been the recent acquisition of high quality experimental measurements of inflow velocities taken in the proximity of a lifting rotor in forward flight. Widely used rotor performance predictive methods are based on blade element strip theory coupled with an inflow model. The inflow prediction models assessed in this paper include the uniform inflow based on momentum, a skewed disk model, and two methods based on a vortex wake structure.
Document ID
19880030064
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Berry, John D. (NASA Langley Research Center Hampton, VA, United States)
Hoad, Danny R. (NASA Langley Research Center Hampton, VA, United States)
Elliott, Joe W. (NASA Langley Research Center Hampton, VA, United States)
Althoff, Susan L. (NASA Langley Research Center; U.S. Army, Rotorcraft Aerodynamics Office, Hampton VA, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
Aerodynamics
Meeting Information
Meeting: National Specialists'' Meeting on Aerodynamics and Aeroacoustics