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Griffith diffusersContoured wall diffusers are designed by using an inverse method. The prescribed wall velocity distribution(s) was taken from the high lift airfoil designed by A. A. Griffith in 1938; therefore, such diffusers are named Griffith diffusers. First the formulation of the inverse problem and the method of solution are outlined. Then the typical contour of a two-dimensional diffuser and velocity distributions across the flow channel at various stations are presented. For a Griffith diffuser to operate as it is designed, boundary layer suction is necessary. Discussion of the percentage of through-flow required to be removed for the purpose of boundary layer control is given. Finally, reference is made to the latest version of a computer program for a two-dimensional diffuser requiring only area ratio, nondimensional length and suction percentage as inputs.
Document ID
19800036578
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Yang, T.-T.
(Clemson University Clemson, S.C., United States)
Nelson, C. D.
(Clemson Univ. SC, United States)
Date Acquired
August 10, 2013
Publication Date
December 1, 1979
Subject Category
Aerodynamics
Accession Number
80A20748
Funding Number(s)
CONTRACT_GRANT: NGL-41-001-031
CONTRACT_GRANT: F33615-74-C-2039
CONTRACT_GRANT: NAS3-13486
Distribution Limits
Public
Copyright
Other

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