Experimental and computational studies of hovering rotor flowsHELIX-I, an essentially standard full-potential CFD helicopter rotor code, is unique in its use of the Clebisch kinematical flow description to specify a freely convecting wake and its capacity for predicting hover performance. A study is presently performed to assess the method's sensitivity to grids and solution-starting techniques. The effects of these parameters on thrust, power, load distribution, and wake geometry are ascertained and compared with an extensive rotor data base. The use of a fairly accurate starting solution yields no obvious advantage over the use of a novel starting method which employs a succession of diminishing artificial flows.
Document ID
19920064330
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Nsi Mba, M. (Institut de Mecanique des Fluides Marseille, France)
Ramachandran, K. (Flow Analysis, Inc.; NASA, Ames Research Center Moffett Field, CA, United States)
Caradonna, F. X. (U.S. Army, Aviation Systems Command; NASA, Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Aerodynamics
Meeting Information
Meeting: AHS International Specialists'' Meeting on Rotorcraft Basic Research