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NUMERICAL AERODYNAMIC ANALYSIS OF A TRANSONIC COMMERCIAL AIRPLANE ACCORDING TO THE ANGLE OF ATTACK AND MACH NUMBER  

Kim, Y.K. (순천대학교 대학원 기계공학과)
Kim, S.C. (순천대학교 기계우주항공공학부)
Choi, J.W. (순천대학교 기계우주항공공학부)
Kim, J.S. (순천대학교 기계우주항공공학부)
Publication Information
Journal of computational fluids engineering / v.13, no.4, 2008 , pp. 66-71 More about this Journal
Abstract
This research computes the viscous flow field and aerodynamics around the model of a commercial passenger airplane, Boeing 747-400, which cruises in transonic speed. The configuration was realized through the reverse engineering based on the photo scanning measurement. In results, the pressure coefficients at the several wing section on the wing surface of the airplane was described and discussed to obtain the physical meaning. The lift coefficient increased almost linearly up to $17^{\circ}$. Here the maximum lift occurred at $18^{\circ}$ according to the angle of attack. And the minimum drag is expected at $-2^{\circ}$. The maximum lift coefficient occurred at the Mach number 0.89, and the drag coefficient rapidly increased after the Mach number of 0.92. Also shear-stress transport model predicts slightly lower aerodynamic coefficients than other models and Chen's model shows the highest aerodynamic values. The aerodynamic performance of the airplane elements was presented.
Keywords
Aerodynamic Force; Transonic Speed; Angle of Attack; Pressure Coefficient;
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