The effect of non-equilibrium condensation on the coefficients of force with the angle of attack in the transonic airfoil flow of NACA0012

The present study investigated the effects of non-equilibrium condensation with the angle of attack on the coefficients of pressure, lift, and drag in the transonic 2-D flow of NACA0012 by numerical analysis of the total variation diminishing (TVD) scheme. At T 0 =298 K and α=3 o , the lift coefficients for M ∞ =0.78 and 0.81 decreased monotonically with increasing Φ 0 . In contrast, for M ∞ corresponding to the Mach number of the force break, C L increased with Φ 0 . For α=3 o and Φ 0 =0%, C D increased markedly as M ∞ increased. However, at Φ 0 =60% and α=3 o , which corresponded to the case of the condensation having a large influence, C D increased slightly as M ∞ increased. The decrease in profile drag by non-equilibrium condensation grew as the angle of attack and stagnation relative humidity increased for the same free stream transonic Mach number. At Φ 0 =0%, the coefficient of the wave drag increased with the attack angle and free stream Mach number. When Φ 0 ＞50%, the coefficient of the wave drag decreased as α and M ∞ increased. Lowering Φ 0 and increasing M ∞ increased the maximum Mach number. § 이 논문은 2014년도 대한기계학회 유체공학부문 춘계학술 대회(2014. 5. 15.-16., 부산 해운대 한화콘도) 발표논문임.

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The effect of non-equilibrium condensation on the coefficients of force with the angle of attack in the transonic airfoil flow of NACA0012

Cited by 4 publications

References 5 publications

Computation of transonic internal flow around a biconvex airfoil with cavity

Computation of transonic internal flow around a biconvex airfoil with cavity

Poly-disperse simulation of condensing steam-water flow inside a large vertical pipe

Effect of Non-Equilibrium Condensation on Force Coefficients in Transonic Airfoil Flow

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