Accession Number : AD0726767

Title :   Supersonic Airfoils of Minimum Total Drag,

Corporate Author : TEXAS UNIV AUSTIN APPLIED MECHANICS RESEARCH LAB

Personal Author(s) : Hull,Don James

Report Date : DEC 1970

Pagination or Media Count : 35

Abstract : Minimum drag airfoil shapes in supersonic flow for a given chord length are considered. The shapes are assumed to be two-dimensional and symmetric. In order to relate the drag of the airfoil to its geometry, it is assumed that the airfoil is slender. The boundary layer is specified to be entirely turbulent. Two cases are solved: (a) minimum drag shape for a given chord and (b) minimum drag shape for a given chord and heat transfer rate. For each case, the minimal shape is obtained by employing the calculus of variations in one independent and dependent variable to the drag expression. (Author)

Descriptors :   (*SUPERSONIC AIRFOILS, *DRAG), TWO DIMENSIONAL FLOW, TURBULENT BOUNDARY LAYER, SLENDER BODIES, AERODYNAMIC CONFIGURATIONS, HEAT TRANSFER, MATHEMATICAL MODELS, CALCULUS OF VARIATIONS

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE