非结构网格在积冰数值模拟中的应用

张强; 高正红; 傅林

非结构网格在积冰数值模拟中的应用

西北工业大学航空学院翼型、叶栅空气动力学国防科技重点实验室,西安 710072

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出版历程
- 收稿日期: 2010-12-29
- 修回日期: 2011-03-21
- 刊出日期: 2011-05-28

Application of unstructured grids in numerically simulating ice accretions

National Key Laboratory of Science and Technology on Aerodynamic Design and Research, School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China

摘要

摘要: 基于非结构网格对翼型表面的积冰进行了数值模拟研究.通过求解气体欧拉方程得到翼型的绕流流场,使用穿透型壁面边界模拟水滴对翼型表面的撞击,采用迭代法对水滴控制方程进行数值求解,得到翼型表面的水滴收集特性;采用不同的积冰冻结模型模拟霜冰和明冰的冻结过程;利用冰层时间推进法模拟积冰过程,基于积冰法向生长假设生成积冰外形.对NACA 0012翼型霜冰和明冰的结冰情况进行了预测研究,通过将冰形预测结果与实验结果进行对比说明所提出的积冰模拟方法是有效的,最后分析了积冰对翼型气动特性的影响.
- 积冰 /
- 过冷水滴 /
- 翼型 /
- 非结构网格 /
- 两相流 /
- 数值模拟
Abstract: Based on unstructured grids,the ice accretions on airfoils have been numerically simulated.The air flowfield was solved using the Euler equations.A permeable wall was used to simulate the droplet impingement on airfoils.An iterative method was developed to solve the governing equations for droplets.The collection efficiency was calculated from the droplet flowfield.The different freezing models corresponding to the rime and glaze ice were employed to simulate the freezing process.The process of ice accretions was simulated with the assumption that ice accumulates layer-by-layer and the ice shape was built with the assumption that ice grows in the direction normal to the airfoil surface.The rime and glaze ice accretions on a NACA 0012 airfoil were investigated and the comparison with the experimental data indicates that the numerical method proposed is effective.The effects of ice accretions on aerodynamic performance of the airfoil were also analyzed.
- ice accretion /
- supercooled droplet /
- airfoil /
- unstructured grid /
- two-phase flow /
- numerical simulation

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参考文献(12)

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