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A novel potential/viscous flow coupling technique for computing helicopter flow fieldsBecause of the complexity of helicopter flow field, a zonal method of analysis of computational aerodynamics is required. Here, a new procedure for coupling potential and viscous flow is proposed. An overlapping, velocity coupling technique is to be developed with the unique feature that the potential flow surface singularity strengths are obtained directly from the Navier-Stokes at a smoother inner fluid boundary. The closed-loop iteration method proceeds until the velocity field is converged. This coupling should provide the means of more accurate viscous computations of the near-body and rotor flow fields with resultant improved analysis of such important performance parameters as helicopter fuselage drag and rotor airloads.
Document ID
19910009747
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Summa, J. Michael
(Analytical Methods, Inc. Redmond, WA, United States)
Strash, Daniel J.
(Analytical Methods, Inc. Redmond, WA, United States)
Yoo, Sungyul
(Analytical Methods, Inc. Redmond, WA, United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1990
Subject Category
Aerodynamics
Report/Patent Number
A-90283
NASA-CR-177568
NAS 1.26:177568
Accession Number
91N19060
Funding Number(s)
CONTRACT_GRANT: NAS2-12962
PROJECT: RTOP 505-61-51
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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