Numerical simulation of a swept wing hot-air anti-icing system

The surface temperature of a swept wing hot-air anti-icing system is calculated. The Eulerian method is used for the calculation of the local water collection efficiency. The external heat transfer coefficient is computed using an integrated boun-dary layer method, and the thermal conduction in the wing skin and the internal heat flow are computed using computational fluid dynamics (CFD) method. By means of the commercial software package FLUENT and its user defined functions (UDF), the external heat flux, the thermal conduction in the wing skin and the internal heat flux are integrated tightly. At the same time, the heat flux boundary conditions and the surface temperature are updated automatically. The calculation of the ARJ21-700 wing anti-icing system by this method demonstrates that the method can assess the performance of a swept wing and supply the foundation for flight test in natural icing conditions.