Numerical Simulation of Heat Transfer Coefficient on Icing Surface of Rotating Cone in Aero-Engine

Heat transfer coefficient is an important parameter for icing and anti-icing of rotating cone. It needs to be known for computing heat transfer and evaporation in numerical simulation of ice accretion. In order to obtain this parameter, heat transfer coefficient on icing surface of a rotating cone has been simulated by numerical method. Firstly, grid independence and numerical approach were confirmed. Then, factors that affect heat transfer were analyzed, including revolving velocity, inflow velocity and inflow temperature. Heat transfer coefficients influenced by these factors on icing surface of a rotating cone with half angle of 40° and height of 176 mm were predicted. The results show that in the cone tip area inflow velocity is more important than revolving velocity, and in other area the revolving velocity is dominated, compared with inflow velocity, and the influence of inflow temperature is also apparent for all icing surface. Finally, heat transfer coefficient correlations are obtained on the base of numerical results under different conditions, in the tip area heat transfer coefficient correlated formula is established using Nu number and inflow Re number, and in other area the correlation is based on Nu number and involving Re number.