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absolute coefficient aerodynamic Aeronautical air stream Angle appears application associated boundary layer Bureau of Standards characteristics chord Cleveland Comparative considerable constructed contraction ratio critical cross section damping screens decay decrease dependent desirable diameter direction Director distance distribution disturbances drag drag coefficient effects entrance section existence extensive factor fair feet figure flight flow fluctuations guide vanes high-speed important increase indicate intensity known Laboratory laminar laminar boundary layer Langley two-dimensional low-turbulence lence lift limited low-drag airfoils low-turbulence pressure tunnel low-turbulence wind tunnels mean speed measurements mechanism mesh methods NACA National Bureau normal obtained operation percent permit possible predicted present problem produced reducing reference relative Research result Reynolds number scale Schubauer settling chamber showed smooth sphere stability surface test section theoretical theory tion transition turbulence level two-dimensional low-turbulence pressure United upstream velocity waves wind tunnels wing wire
Page 12 - Schubauer, GB and Klebanoff, PS : Theory and application of hotwire instruments in the investigation of turbulent boundary layers, NACA Wartime report ACR No.
Page 1 - ... sessions at Cambridge with Harvard and the Massachusetts Institute of Technology joint hosts, to have supplementary programs at New York under the auspices of Columbia, the American Society of Mechanical Engineers, and the Institute of the Aeronautical Sciences, and at Washington under the auspices of the National Bureau of Standards and the National Advisory Committee for Aeronautics. Furthermore, Congress members from overseas were offered a tour of industrial laboratories at Pittsburgh, Schenectady,...