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�������պ����ѧѧ�� 2008, Vol. 34 Issue (02) :158-161    DOI:
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Numerical simulation on flow field and infrared characteristics of chevron nozzles
Huang Hongyan, Wang Qiang*
School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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ժҪ �����������QUICK��ʽ��������Ⱥ(RNG) k-ε ����ģ��,����ϱ��溯��,ͬʱ������ɢ���귨DOM(Discrete Ordinates Method)�����ȷ���,�Ի������Ȩģ��WSGGM(Weighted-Sum-of-Gray-Gases Model)ȷ��������ʵķ�������,���N-S���̡��̱��е��ȴ������̡���������-������������ʵķ��䴫�䷽��.���ô���ϼ���ģ�Ͷ�V��βԵ��������ܽ�������ֵģ��,�������������������Ǻ�����.�ڴ˻�����,����/��V��βԵ��-����ܵ�����������������Կ�չ����ֵģ��.�������:V��βԵ��β�����ļ��в��в�����ǿ�ҵ�������,�ٽ�����������ǿ�����,������������ܳ��ڸ��������ĺ������.
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Abstract�� The QUICK and finite volume method, RNG k-ε turbulence model, wall functions, discrete ordinates method (DOM) and the weighted-sum-of-gray-gases model (WSGGM) were employed to solve N-S equation, thermal conduction equation in solid wall and radiation transfer equation. A converging nozzle with chevron trailing edge was simulated, and the computed results were validated with available experimental data. The internal and external flow field and infrared characteristics of a converging-diverging nozzle with or without chevron trailing edge were simulated. The result of this research shows that the chevrons induce streamwise vortices into the shear layer, which lead to increased mixing and is benefit to the reduction of infrared radiation of the plume especially near to the nozzle exit.
Keywords�� temperature distribution   fluid mechanics   infrared radiation   numerical analysis     
Received 2007-03-14;
About author: �ƺ���(1980��),��,����������,��ʿ��,hyan_h@sjp.buaa.edu.cn.
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�ƺ���,��ǿ.V��βԵ���������������Ե���ֵģ��[J]  �������պ����ѧѧ��, 2008,V34(02): 158-161
Huang Hongyan, Wang Qiang.Numerical simulation on flow field and infrared characteristics of chevron nozzles[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(02): 158-161
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2008/V34/I02/158
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