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Experiment and simulation of impinging coaxial gas-gas injector
Gao Yushan, Chen Ze, Li Mao, Cai Guobiao*
School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� In order to investigate the effect of design parameters of gas-gas injector on mixing and combustion characteristics, experiment and numerical simulation were conducted on the injectors which had an angle that gaseous hydrogen impinge gaseous oxygen. Hot fire tests were carried out to investigate the effect of impinging angle on the combustion efficiency and the chamber wall temperature. Numerical simulation was performed to analysis the effect of the impinging angle on the temperature of the injector faceplate and the oxygen post tip. The results show that the combustion efficiency, the thermal load of the chamber wall and the oxygen post tip decrease as the impinging angle increases; the impinging angle of the gaseous hydrogen towards gaseous oxygen makes the thermal load of the injector faceplate increases.
Keywords�� gas-gas injector   impinging angle   combustion efficiency   thermal load     
Received 2010-04-16;
Fund:

����863�ƻ�������Ŀ(2009AA7020504)

About author: ������(1983- ),��,ɽ���ൺ��,��ʿ��,gys_841010@yahoo.cn.
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������, ����, ��ï, �̹��.ͬ��ײ����-��������ֵģ���ʵ��[J]  �������պ����ѧѧ��, 2011,V37(8): 923-926
Gao Yushan, Chen Ze, Li Mao, Cai Guobiao.Experiment and simulation of impinging coaxial gas-gas injector[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2011,V37(8): 923-926
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