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http://dx.doi.org/10.5139/JKSAS.2007.35.7.581

Aerodynamic performance of Modified Sonic Arc Airfoil  

Lee, Jang-Chang (안동대학교 기계공학부)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.35, no.7, 2007 , pp. 581-585 More about this Journal
Abstract
Sonic arc airfoil derived from the TSD theory is modified to new airfoil shape and its aerodynamic performance in transonic flow is investigated. The numerical simulation using Euler equations for the modified sonic arc airfoil is performed. The numerical results are compared with the aerodynamic performance of NACA0012 airfoil, of supercritical airfoil, and of NACA64A210 airfoil. In the same free stream Mach number of transonic flow, the pressure drag of the modified sonic arc airfoil is smaller than that of NACA0012 airfoil and the lift-drag ratio of the modified sonic arc airfoil is much larger than that of NACA0012 airfoil. In the comparison of the drag-divergence Mach number of transonic flow, the drag-divergence Mach number of the modified sonic arc airfoil is larger than that of NACA64A210 airfoil but is smaller than that of supercritical airfoil.
Keywords
Sonic Arc Airfoil; Mach Number; TSD(transonic-small disturbance); theory; Supercritical Airfoil;
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