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ESDU 89008 C

ESDU 89008 C 1990-DEC-01 Normal-force-curve and ptchng-moment-curve slopes of forebody-cylnder combnatons at zero angle of attack for Mach numbers up to 5

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ESDU 89008 uses data drawn from the literature to produce semi-empirical correlations for the aerodynamic characteristics of cone and ogive forebodies, either sharp or with varying degrees of spherical blunting, on cylindrical afterbodies. The correlations provide the two slopes as the sum of three contributions: the inviscid loading distribution at angle of attack, the changes caused by the boundary layer displacement thickness, and the skin friction contribution. A fully turbulent boundary layer is assumed and the correlations are expected to apply to all axisymmetric forebody shapes whether or not there is a smooth-surface transition from the forebody to the cylinder. The correlations are presented graphically and the ranges of geometries and flow conditions studied are tabulated. Two worked examples illustrate their application in practice. The calculation, procedure is programmed in ESDUpac A9034, see ESDU 90034.

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