In this article, the transition model, γ-Reθ, proposed by Menter, was applied to model the transition past a flat plate and a supercritical airfoil, RAE-2822. The computational results show good agreements with the available measurements. It shows that this transition model is effective and reliable to simulate the transition over the airfoil. Furthermore, this transition model is applied to simulate the hybrid laminar flow control by suction past another supercritical airfoil with and without the ice at th...