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�������պ����ѧѧ�� 2003, Vol. 29 Issue (8) :663-667    DOI:
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Influence of ambient pressure on aerospike nozzle base pressure
Li Junwei, Liu Yu*
School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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ժҪ Ϊ���˽⻷��ѹǿ����ʽ��ܵײ�ѹǿ��Ӱ��,������ʽNND��ʽ(Non-oscillation, No free coefficients Dissipative scheme)����ά����N-S����,��������û�еײ��������Ͷ�������������Ϊ1.4%�������,��ͬ����ѹǿʱ�ĵײ�ѹǿ.�������,���Ż���ѹǿ������,�ײ�ѹǿҲ������,���ڱ�β��ʱ���ӻ���,�ڿ�β��ʱ,����Ѹ��,�����ܳ��ֲ���.
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Abstract�� In order to understand the influence of ambient pressure on aerospike nozzle base pressure, the implicit NND(non-oscillation, no free coefficients dissipative) scheme was employed to solve 2-D laminar N-S equations. Aerospike nozzle flow fields under different ��C��NPR (i.e. nozzle pressure ratio) without base secondary flow and with secondary flow of 1.4% mass flux rate were obtained. The result shows that with the increase of ambient pressure, base pressure also increases. But under closed wake, the increase is slow; under open wake, the increase is rapid and even the pressure fluctuates.
Keywords�� rocket engines   plug nozzles   base pressure   numerical computation     
Received 2002-06-28;
Fund:

����863�߼�����������������Ŀ(863-2-3-4-10);�ߵ�ѧУ��ʿѧ�Ƶ�ר����л���������Ŀ(2000000619)

About author: ���ΰ(1978-),��,���������,��ʿ��, david78lee@sina.com.
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���ΰ, ����.����ѹǿ��������ʽ��ܵײ�ѹǿ��Ӱ��[J]  �������պ����ѧѧ��, 2003,V29(8): 663-667
Li Junwei, Liu Yu.Influence of ambient pressure on aerospike nozzle base pressure[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2003,V29(8): 663-667
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