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Tests in the Variable Density Wind Tunnel to Investigate the Effects of Scale and Turbulence on Airfoil Characteristics

John Stack

出版	National Advisory Committee for Aeronautics, 1931
URL	http://books.google.com.hk/books?id=1XFDAQAAIAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋

Because of the limited scope of the tests, no general conclusions have been drawn, but it is indicated that increasing either turbulence or scale eliminates the discontinuities in the lift curves for thick airfoils, and that the effects of increased turbulence on the profile drag of airfoils tend to become of small importance at very high Reynolds numbers. It is further indicated that the effects of large scale changes on the aerodynamic characteristics of airfoils are of greater importance than the effects of large turbulence changes.