Accession Number : AD0786221

Title :   Thrust Augmented Wing Sections in Potential Flow.

Descriptive Note : Scientific rept.,


Personal Author(s) : Wilson,James Dennis ; Loth,John L. ; Chandra,Subrato

Report Date : AUG 1974

Pagination or Media Count : 148

Abstract : A method is presented for calculating the incompressible, potential flow for an arbitrary thrust augmented wing section, possibly experiencing inflow over portions of its surface. The solution includes the shape of an inviscid jet leaving the airfoil calculated by an automatic iteration procedure. The problem is formulated by covering the airfoil-jet surface with line segments which carry velocity discontinuity distributions and satisfy the boundary condition on velocity at the midpoints of the segments. Applying the boundary condition for a particular jet shape leads to a set of linear algebraic equations to be solved for the velocity discontinuity strengths. The final jet geometry is found when the net pressure force for each set of surface elements on the front and back of the jet is balanced by the centrifugal force acting on the fluid within the jet at the corresponding location. (Modified author abstract)

Descriptors :   *Wings, *Thrust augmentation, *Control jets, Airfoils, Incompressible flow, Ejectors, Jet flaps, Mathematical models, Computer programs, FORTRAN

Subject Categories : Aerodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE