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�� ǿ, ���廪, �� ��*
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Numerical method to simulate rime ice accretions on an airfoil
Zhang Qiang, Cao Yihua, Li Dong*
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ ����ŷ���������������һ�����ͱ���˪������ֵģ�ⷽ��.����ͬλ�����ϵ�SIMPLE (Semi-Implicit Method for Pressure Linked Equations) �㷨���������Ʒ���;���һ�ֿɴ�͸�ͱ���߽�ģ��ˮ�ζ����ͱ����ײ��,ͨ��������ˮ�εĿ��Ʒ��̵õ����ͱ����ˮ���ռ�����;���ñ���ʱ���ƽ���ģ���������,ʹ�û������������������ɻ�������.��NACA 0012������0°��4°ӭ���µĻ�������������о�,����Ԥ������ʵ����һ��.ͨ���Խ�������ѹ���ֲ����з���,���������������������ܻ��������Ӱ��.
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Abstract�� Based on the Eulerian two-phase flow theory, a numerical method to simulate rime ice accretions on an airfoil has been developed. The semi-implicit method for pressure linked equations (SIMPLE) algorithm on a collocated grid was employed to solve the governing equations for the airflow. In order to simulate droplets impinging on an airfoil, a permeable wall was proposed to solve the governing equations for supercooled droplets. The collection efficiency and impingement limits were obtained from the droplets- flowfield. The process of ice accretion was simulated using 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 ice accretions on a NACA 0012 airfoil at 0° and 40° angles of attack have been investigated and there is agreement between the simulated results and experimental data. A conclusion that ice accretions degrade the airfoil-s aerodynamic performance can be drawn based on the analysis of pressure distribution along the iced airfoil.
Keywords�� ice accretion   two-phase flows   permeable wall   collection efficiency   numerical simulation     
Received 2008-03-04;
About author: �� ǿ(1980-),��,�����Ӱ���,��ʿ��,zqlyxx@gmail.com.
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�� ǿ, ���廪, �� ��.����ŷ���������������ͱ���˪������ֵģ��[J]  �������պ����ѧѧ��, 2009,V35(3): 351-355
Zhang Qiang, Cao Yihua, Li Dong.Numerical method to simulate rime ice accretions on an airfoil[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2009,V35(3): 351-355
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