Numerical Simulation Of Anti-icing Performance Of Rotating Cone Using Rotating Heat Pipe

Ice accretion may occur on the entry components of an aero-engine, such as the inlet、the fan blades、the struts and the cone under some meteoric and flight conditions. Once the ice becomes thicker, the section area of the inlet would reduce, that would lead to engine performance deterioration. When ice becomes serious, the weight of the cone would increase, the engine load would increase, that would lead to engine work bad. If the ice falls off, that would lead to endanger engine safety. Therefore, in order to prevent ice accretion, we must take steps for anti-icing. Compared with hot air anti-icing and hydrophobic coating anti-icing, the rotating heat pipe anti-icing has unique advantage. But the mechanism of fluid flow and heat transfer in rotating heat pipe is still not very clear, it needs to be further studied. In this study, Euler-Euler multiphase model is used to study the liquid and vapor as a whole region. Two dimensional mathematical model based on the complete Navier-Stokes equation is established to find more characteristics of fluid flow and heat transfer in rotating heat pipe.A numerical model was built to simulate the flow and heat transfer phenomena during the operation of an axial rotating heat pipe. The evaporation model of pure heat conduction and evaporation model considering natural convection are studied. The results of two models are compared with the experimental results in order to explore the advantages and disadvantages of the phase change models. Based on phase change model considering natural convection, the parameters are studied on the characteristic of fluid flow and heat transfer such as heat transfer, fluid load, rotating speed and working medium. The results show that the evaporation model of pure heat conduction is not agree with the experimental results. The evaporation model considering natural convection is agree with the experimental results indicating that it is reliable and accurate. With the increase of the rotating speed, the heat transfer performance is increased. The effect of liquid load on the heat transfer performance is small, it is in agreement with the experimental result in the literature. The effect of the material parameters on the heat transfer performance of the rotating heat pipe is obvious. The total taper rotating heat pipe and typical rotating heat pipe have the similar working property. Compared with the typical rotating heat pipe, the temperature of the condensing section in total taper rotating heat pipe is more uniform.Based on the previous research, the phase change model including natural convection is used to simulate the anti-icing performance of the rotating heat pipe. Heat transfer has little effect on heat transfer performance. Fluid load has effect on temperature uniformity of the cone. With the increase of the rotating speed, the heat transfer performance is increased. Rotating speed has little effect on temperature uniformity of the cone. The thermal conductivity of material is larger, the cone temperature is more same. On anti-icing conditions, the temperature difference between lubricant and environment is above 100℃. While maintaining the cone temperature above freezing temperature, the temperature difference between the evaporation section and the cone is far lower than that between lubricant and environment. It shows that the lubricating oil can be as heat source, the anti-icing performance of the rotating heat pipe is very good. In this paper, the method based on the numerical simulation can be used to study of different structures and parameters reducing the manpower, material and financial resources in order to provide support and guidance for the engineering design.