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Considerations on the Effect of Wind-tunnel Walls on Oscillating Air Forces for Two-dimensional Subsonic Compressible Flow
Harry L. Runyan
Charles E. Watkins
出版
National Advisory Committee for Aeronautics
, 1951
URL
http://books.google.com.hk/books?id=a6Et3BwJfkkC&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN
註釋
This paper treats the effect of wind-tunnel walls on the oscillating two-dimensional air forces in a compressible medium. The walls are simulated by the usual method of placing impages at appropriate distances above and below the wing. An important result shown is that, for certain conditions of wing frequency, tunnel height, and Mach number, the tunnel and wing may form a resonant system so that the forces on the wing are greatly changed from the condition of no tunnel walls.
