NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Decay of Far-Flowfield in Trailing VorticesMethods for reduction of velocities in trailing vortices of large aircraft are of current interest for the purpose of shortening the waiting time between landings at central airports. We have made finite-difference calculations of the flow in turbulent wake vortices as an aid to interpretation of wind-tunnel and flight experiments directed toward that end. Finite-difference solutions are capable of adding flexibility to such investigations if they are based on an adequate model of turbulence. Interesting developments have been taking place in the knowledge of turbulence that may lead to a complete theory in the future. In the meantime, approximate methods that yield reasonable agreement with experiment are appropriate. The simplified turbulence model we have selected contains features that account for the major effects disclosed by more sophisticated models in which the parameters are not yet established. Several puzzles are thereby resolved that arose in previous theoretical investigations of wake vortices.
Document ID
19970023970
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Baldwin, B. S.
(NASA Ames Research Center Moffett Field, CA United States)
Chigier, N. A.
(Sheffield Univ. United Kingdom)
Sheaffer, Y. S.
(NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
August 17, 2013
Publication Date
December 1, 1973
Publication Information
Publication: AIAA Journal
Publisher: American Institute of Aeronautics and Astronautics
Volume: 11
Issue: 12
Subject Category
Aerodynamics
Report/Patent Number
NAS 1.15:112776
AIAA Paper 72-989
NASA-TM-112776
Meeting Information
Meeting: Atmospheric Flight Mechanics
Location: Palo Alto, CA
Country: United States
Start Date: September 11, 1972
End Date: September 13, 1972
Sponsors: American Inst. of Aeronautics and Astronautics
Accession Number
97N72224
Distribution Limits
Public
Copyright
Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available