ESDU 89008
Normalforcecurve and pitchingmomentcurve slopes of forebodycylinder combinations at zero angle of attack for Mach numbers up to 5.
Abstract:
ESDU 89008 uses data drawn from the literature to produce semiempirical 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 smoothsurface 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.Indexed under:
 Cone Cylinders
 Cones
 Derivatives
 EllipsoidalNosed Cylinders
 Forebody
 ForebodyCylinders
 NormalForceCurve Slope
 Ogive Cylinders
 PitchingMomentCurve Slope (M_{W} or C_{mα})
Details:
Data Item ESDU 89008  

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This Data Item contains 7 interactive graph(s) as listed below.
Graph  Title 

Figure 1  C_{Nαl} as a function of M_{ ∞} and l_{f}/D 
Figure 3  Displacement thickness at body base for fully turbulent boundary layers 
Figure 4  Mean skin friction coefficient for fully turbulent boundary layers 
Figure 6  G for bodies with discontinuity at forebodycylinder junction 
Figure 7  Δ[(C_{m})_{0α}/C_{N}_{α}]_{i} for secantogive forebodies 
Figure 8a  Δ[(C_{m})_{0α}/C_{N}_{α}]_{i} for blunted tangentogive and cone forebodies 
Figure 8b  Δ[(C_{m})_{0α}/C_{N}_{α}]_{i} for blunted tangentogive and cone forebodies 