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�������պ����ѧѧ�� 2003, Vol. 29 Issue (3) :244-247    DOI:
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Design of Small��Size and High��Pressure Centrifugal Fans Used in Helicopters
Li Lin, Yu Jianzu, Xie Yongqi*
Dept. of Flight Vehicle Design and Applied Mechanics, Beijing University of Aeronautics and Astronautics

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Abstract�� Based on the characters of high-pressure, high-speed and small-size of centrifugal fans used in helicopters, the basal structure parameters of the fans were analyzed and calculated. Efforts were made to analyze the flowing rules of the gas in the impeller. Influence of distribution of the gas vortex on the across-section was discussed. Restriction requirements of selecting the gas vortex was put forward. The shape of the meridian-section and the across-section was designed. It was proved that the efficiency of the centrifugal fans can be evidently improved by reasonably determining the distribution of the gas vortex.
Keywords�� centrifugal fans   blade profile   generality   gas vortex     
Received 2001-10-10;
About author: �� ��(1977-),Ů,�����差��,˶ʿ��,100083,����.
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����, �ཨ��, л����.ֱ������С�͸�ѹ����ʽ��������[J]  �������պ����ѧѧ��, 2003,V29(3): 244-247
Li Lin, Yu Jianzu, Xie Yongqi.Design of Small��Size and High��Pressure Centrifugal Fans Used in Helicopters[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2003,V29(3): 244-247
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2003/V29/I3/244
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