Numerical method of ice-accretion software AERO-ICE

被引：0
|
作者：
Li H. [1 ]
Duan Y. [1 ]
Zhang Y. [1 ]
Chen H. [1 ]
机构：
[1] School of Aerospace Engineering, Tsinghua University, Beijing
来源：
Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2021年 / 42卷
基金：
中国国家自然科学基金;
关键词：
Aircraft icing; Euler method multiphase flow calculation; Icing thermodynamic analysis; Non-streamlined body with large separation; Water film flow;
D O I：
10.7527/S1000-6893.2021.26371
中图分类号：
学科分类号：
摘要：
Natural ice-accretion poses threat to aviation flight safety. When an aircraft passes through the clouds containing supercooled water droplet, ice could be accumulated according to certain physical laws. This paper introduces a three-dimensional icing simulation software AERO-ICE. The software is composed of four modules: automatic grid generation, RANS calculation of air flow field, Euler calculation of water drop field and thermodynamic analysis of icing. In the calculation of the air flow field, the SPF k-v 2--ω turbulence model is adopted, which introduces the fixing term of non-equilibrium characteristics of turbulence. The model is developed to improve the prediction of non-streamlined large separation flow. Because of the large source term, the solving process of the Euler equation of the water field can be hard to converge. AERO-ICE software uses flow field smoothing, second-order MUSCL space discretization and LU-SGS implicit time marching method to improve numerical stability. In the icing thermodynamic analysis module, the AERO-ICE software has both Messinger and Myers models. The wall temperature predicted by the Messinger model is used as the boundary condition of the Myers model. This method solves the empirical problem of temperature setting in the Myers model. AERO-ICE software supports multi-block gird, multi-grid acceleration technology and large-scale parallel computing. The calculation of the ice-accretion has been preliminarily verified. © 2021, Beihang University Aerospace Knowledge Press. All right reserved.
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