Heat Transfer Correlations for Smooth and Rough Airfoils

Low-fidelity methods such as the Blade Element Momentum Theory frequently provide rotor aerodynamic performances. However, these must be coupled to databases or correlations compute heat transfer. The literature lacks average transfer around airfoil. present study develops for an over smooth and rough correlation coefficients were obtained from a CFD database using RANS equations Spalart–Allmaras turbulent model. This work studies NACA 0009, 0012, 0015 with without leading roughness representative of small ice accretion. numerical results are validated against lift drag literature. at stagnation point compares well experimental results. indicates negligible dependency on airfoil thickness. presents two analysis: one airfoils airfoils. For zero coefficient, Nusselt number is maximum. increases Re0.636 surface Re0.85 surface. As increases, reduced by values proportional square coefficient surface, while it Re