UNSTEADY AERODYNAMICS FOR ADVANCED CONFIGURATIONS. PART 2. A TRANSONIC BOX METHOD FOR PLANAR LIFTING SURFACES
Technical documentary rept.
NORTH AMERICAN AVIATION INC DOWNEY CA SPACE AND INFORMATION SYSTEMS DIV
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The fundamental equations of the transonic box method were derived, based on the representation of the velocity potential by a doublet distribution. They form the basis of a systematic method of treating an oscillating wing at M 1, analogous to the supersonic Mach box method. A digital computer program, written in Fortran IV, is presented. The program applies to a planar wing of polygonal planform, with a straight trailing edge, and as many as three sweep angles along the leading edge. For a maximum of ten modes of oscillation, the program computes the oscillatory potentials and pressures and a generalized force matrix. Results obtained from the program are compared with existing theoretical and experimental values. Several possible extensions of the method are described.