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�������պ����ѧѧ�� 2007, Vol. 33 Issue (10) :1162-1165    DOI:
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Optimal design of nozzle for hypersonic vehicle
Cao Deyi, Lee Chunhian*
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� An optimal design procedure was proposed by utilizing the method of characteristics in conjunction with a multi-island genetic algorithm. The reflection angle of the nozzle upper wall, the length of the lower wall, and the flap length and angle were chosen to be the design variables, and a parametric study with respect to these variables was performed. The numerical results demonstrate that the proposed procedure is highly efficient, and capable of providing sufficiently accurate data for nozzle optimal design. It is also found that all four parameters chosen as the design variables will substantially affects the aerodynamic performances of the nozzle, among them, the reflection angle of the nozzle upper wall and the flap have remarkable influence on lift and thrust respectively. Hence, the trade-off among these variables must be taken into account to achieve the optimum result.
Keywords�� nozzles   optimization   genetic algorithms   method of characteristics     
Received 2006-10-13;
About author: �ܵ�һ(1980��),��,������Ϫ��,��ʿ��,CaoDy@ase.buaa.edu.cn.
�ܵ�һ,���.�߳����ٷ�����β��ܵ��Ż����[J]  �������պ����ѧѧ��, 2007,V33(10): 1162-1165
Cao Deyi, Lee Chunhian.Optimal design of nozzle for hypersonic vehicle[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(10): 1162-1165
http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2007/V33/I10/1162
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