Investigation of rotary cone electric heating anti-icing transient process

Icing on the rotary cone surface of an aircraft engine may cause flight safety problem. Some works including the drops impingement characteristics of rotary cone based on Eulerian two-phase flow theory, presenting of the surface convective heat transfer calculation method of rotating part and the development of electro-thermal anti-icing calculating program based on improved Messinger freezing model were presented in this paper. Based on those researches, several benchmark examples were tested to verify the methods, to research the anti-icing transient process and predict the performance of periodic electric-heating anti-icing system. The results showed that the rotation of the rotary cone could enhance convective heat transfer, the surface temperature was lower with greater revolving speed under the same heating power. During Anti-icing system startup stage, icing and ice shedding phenomenon happened, and the response time of the system with freezing was reduced. Using the same electric heating power, the energy efficient of periodic electrical heating anti-icing process was higher, while with the same electric heating energy consumption, the response speed of periodic electric heating anti-icing system was faster, however it faced more risks of freeze.