Wing-body carryover for noncircular missiles

Abstract

)9 the wing-body carryover factor due to body upwash on an undeflected wing, and wing center of pressure (CP) are investigated for unbanked, supersonic missiles with square and triangular fuselage cross sections at low angles of attack. The parametric effects of Mach number, wing leading-edge sweep back angle, angle of attack, and body cross-sectional shape on Kw(B) and wing CP were numerically examined. The calculations were performed using a spatial marching Euler code ZEUS. Predicted KW(B) results were compared to slender-body theory values historically used for preliminary missile design. Computed KW(B) and wing CP results were found to exhibit sensitivity to Mach number, wing leading-edge sweep angle, and body cross-sectional shape. Euler Kw(B) and wing CP values generally compare favorably to slender-body theory predictions in trend, but differ in magnitude by up to 15%. ZEUS predictions of kw(B)> the wing-body interference factor for an all-moving control surface, are also presented for square fuselage cross sections. All computed results are valid for missiles in the + orientation at small angles of attack and Mach numbers from 2 to 4. Data are presented to extend the missile preliminary design data base for arbitrary cross-sectional bodies.