The purpose of this paper is to present some results on the development and verification of NUAA-ICE2D icing software code, which contains five separate program modules and a graphical user interface. Computational simulation of the ice accretion process on airfoils using multiple time-steps is studied in this paper. Firstly, all the modular codes for icing computation have been established in FORTRAN90 based on the Dynamic Link Library (DLL), and then a software package to perform normal functions of these modules has been developed using Microsoft Foundation Classes (MFC) framework. In addition, this icing software has some visualization tools that can help user analyze, explore and understand the simulation data. The architecture of the software, the functions of each component, its application to icing prediction and the further development are also discussed in this document. It is shown that all the modular codes of the software have good precision and fast calculation velocity during the process of grid generation, flow field calculation, droplet impingement calculation and ice growth analysis because of use of DLL and MFC, the illustration chart of operational interface is briefly shown in Figure 1. This platform software not only has established a reliable data communications law among these computational modules, but also has given an efficient way to predict the ice-layer accretion on the surfaces of geometry, the results are compared we are in accordance with the experimental data, shown in Figure 2. Once the calculations for ice accretion are activated, the software can call the five modules alternately and automatically in a robust way. This paper will provide some new techniques for predicting the ice accretion on airfoil efficiently and developing integrated icing software using mixed-language programming, which can be used in the stage of airfoil design and assessment. This paper presents some new ideas to improve the efficiency and reliability in icing calculations, especially in user-oriented way.
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