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Experience with scale effects in non-airplane wind tunnel testingThe aerodynamics results of two tests performed in the 80- by 120-Foot Wind Tunnel at NASA Ames Research Center are discussed with particular emphasis on the effects of model scale. The tests are unusual for this facility in that they were performed on non-airplane configurations: a full-scale tractor/trailer and large ramair inflated wings. For the truck drag measurements, comparisons with 1/8th-scale drag data taken at the Low Speed Wind Tunnel at Texas A&M indicate that small scale measurements can provide adequate accuracy if care is taken to test at high enough Reynolds numbers and if large regions of separated flow and reattachment are avoided. Some of the important aerodynamic and structural aspects of parafoil testing are also discussed. These include the effects of Reynolds number and aeroelastic effects such as fabric and support line stretch.
Document ID
19900038110
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ross, J. C.
(NASA Ames Research Center Moffett Field, CA, United States)
Olson, M. E.
(Navistar International Transportation Corp. Fort Wayne, IN, United States)
Date Acquired
August 14, 2013
Publication Date
February 1, 1990
Subject Category
Research And Support Facilities (Air)
Report/Patent Number
AIAA PAPER 90-1822
Accession Number
90A25165
Distribution Limits
Public
Copyright
Other

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