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�������պ����ѧѧ�� 2010, Vol. 36 Issue (9) :1034-1037    DOI:
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���֪, ���廪, �� ��*
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Rotor icing model and trim characteristics analysis for tandem helicopter
Li Guozhi, Cao Yihua, Zhong Guo*
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ Ϊ���о�����ʽֱ���������ķ��ж���ѧ����,����CFD(Computational Fluid Dynamics)���������������������ģ��;����������綴��������,���ǽ�Ҷ���渽�ű����估��Ҷ����ֲ��¶ȶԽ����Ӱ��,������������Ĺ���ģ��.����������ʽֱ���������ķ��ж���ѧģ��,�о��˲�ͬ�����ٶ������½��������CH-47Bƽ�����Ե�Ӱ��,�����˻����¶ȡ����ʱ�䡢Һ̬ˮ�����Լ�ƽ��ˮ��ֱ��������Ť�ص�Ӱ��.�������ĶԱȷ�����ʾ:���ֽ��ģ���ڼ��㾫���ϻ���һ��,�������ģ�ͺ���,�ܹ��������н����ķ��ж���ѧ����,Ϊ����ʽֱ���������ķ��ж���ѧ�о��춨�˻���.
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Abstract�� A theoretical rotor icing model was proposed based on the computational fluid dynamics (CFD) technique to study the tandem rotor helicopter dynamics due to icing. Considering the rotor blade ice shedding and local temperature variation on the rotor blade, another engineering rotor icing model was advanced based on the rotor icing tunnel data. The model of the tandem rotor helicopter dynamics due to icing was built and the trim characteristics of CH-47B due to icing at the hover and in the forward flight were analyzed. The effect on the rotor torque due to temperature, icing time, liquid water content and median volumetric diameter in the icing condition was computed. The agreement between the theoretical rotor icing model and the engineering method indicates that the models are feasible and effective, and they can lay the foundation of the research about the tandem helicopter dynamics in the icing condition.
Keywords�� tandem helicopter   rotor icing   ice shedding   trim characteristics     
Received 2009-07-06;
Fund:

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About author: ���֪(1984-),��,���Ϻ�����,��ʿ��,liguozhibuaa@163.com.
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���֪, ���廪, �ӹ�.������ģ��������ʽֱ����ƽ�����Է���[J]  �������պ����ѧѧ��, 2010,V36(9): 1034-1037
Li Guozhi, Cao Yihua, Zhong Guo.Rotor icing model and trim characteristics analysis for tandem helicopter[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2010,V36(9): 1034-1037
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