Aerodynamic Interference for Hypersonic Missiles at Low Angle of Attack


The Euler code (ZEUS) is used to predict the flowfield over a hypersonic missile and to determine the carryover factors KW(B) for the wing lift in the presence of the fuselage and KB(W) for the lift produced by the fuselage in the presence of the fins. The missile is assumed to have cruciform, delta-fins in the "+" orientation. Results are presented at Mach 6, 8, and 10, for a 2 degree angle of attack, and a ratio of specific heats (γ) of 1.4 and 1.3. γ = 1.3 partially accounts for chemistry effects. KW(B) and KB(W) are determined for ratios of fin span to body radius at the fin leading edge (S/RLE) from 1 to 5 for a missile with an aspect ratio of 1.53. Both KW(B) and KB(W) have approximately the same variation with fin size as the slender body predictions. The values of Ktf/(B) and KB(W) are 2 at S/RLE = 1 (missile without fins). KW(B) decreases toward 1 and KB(w) decreases toward 0.20 as S/RLE approaches 5 (approximating an airplane wing). At a given (fixed fin size) decreases and KB(W) increases as Mach number increases. At a fixed value of (S/RLE) and Mach number both KW(B) and KB(W) increase slightly as γ decreases from 1.4 to 1.3. Tabulated values of KW(B) and KB(W) are presented.


Mechanical and Aerospace Engineering

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Article - Conference proceedings

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Publication Date

01 Jan 1998

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