
Accession Number : AD0831747
Title : UNSTEADY AERODYNAMIC FORCES FOR GENERAL WING/CONTROLSURFACE CONFIGURATIONS IN SUBSONIC FLOW PART ITHEORETICAL DEVELOPMENT,
Corporate Author : GRUMMAN AIRCRAFT ENGINEERING CORP BETHPAGE NY ADVANCED DEVELOPMENT PROGRAM
Personal Author(s) : Berman, J. H. ; Shyprykevich, P. ; Smedfjeld, J. B.
Report Date : DEC 1967
Pagination or Media Count : 78
Abstract : A kernelfunction procedure is presented for the prediction of subsonic oscillatory pressure distributions on finiteaspectratio wings with partialspan control surfaces. The basic wing pressureseries functions used in previous kernelfunction applications are augmented in this report to include the logarithmic singularity at the controlsurface leading edge, and to account for gap effects at the controlsurface side edges. The procedure employs either a conventional planar kernel function or, on an optional basis, a nonplanar kernel function which considers the effect of an initially deflected control surface. The solution for the unknown coefficients of the pressureseries functions is performed in a leastsquares sense based on downwash values at locations chosen by the program user. The final results obtained are in the form of pressure distributions and generalized forces. Finally, a limited correlation of program calculations with available experimental data is presented. (Author)
Descriptors : (*AERODYNAMIC CONTROL SURFACES, SUBSONIC CHARACTERISTICS), MATHEMATICAL PREDICTION, AIRFOILS, ASPECT RATIO, OSCILLATION, LIFT, DOWNWASH, TWO DIMENSIONAL FLOW, NUMERICAL INTEGRATION, MOMENTS, LEADING EDGES, AERODYNAMIC CHARACTERISTICS, EQUATIONS, BESSEL FUNCTIONS, CORRELATION TECHNIQUES, NUMERICAL METHODS AND PROCEDURES, MATRICES(MATHEMATICS), AERODYNAMIC LOADING.
Subject Categories : Statistics and Probability
Fluid Mechanics
Distribution Statement : APPROVED FOR PUBLIC RELEASE