Study of the design and performance calculation of the wing hot-air anti-icing system

A study of the design and performance calculation of the wing hot-air anti-icing system is presented. The design of the system includes the local collection efficiency calculation, the anti-icing heat load calculation, the configuration design and flow distribution calculation of the piccolo tube inside the wing antiicing cavity, structure design of the wing anti-icing cavity, which are described in detail in the paper. The performance validation of the system is conducted by the calculation of the surface temperature and the runback water on the surface. The design of the piccolo tube includes the jet hole diameter, number and distance. In order to confirm the design satisfied the need of air supply for anti-icing, the calculation of the hot-air flow distribution of the piccolo tube is performed based on the software Flowmaster, which is a one-dimensional thermal fluid simulation platform. The calculations of heat load, surface temperature and runback water are computed by user-defined functions in software FLUENT. The results show that the system designed satisfies the need of ice protection. The design method of hot-air anti-icing system proposed in this paper provide vital help for design and optimization of this system.