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结合旋涡耗散模型及Arrhenius化学反应速率系数来描述燃烧室内的化学反应,对三股互击式喷注器及燃烧室的冷流场及有反应流场进行了三维的数值模拟研究.引入螺旋度及混合长度参量分析了三股互击式喷注器的混合机理和混合效果,获取了燃烧室的关键特征参数,如总温、总温的空间分布、气流在燃烧室内的驻留时间等.对燃料组合分别采用F-O-F,O-F-O的喷注器及燃烧室的流场特性进行了比较分析.对于一定的燃料配比和燃烧室特征长度,燃料组合采用O-F-O时,在燃烧室出口的F2解离度比F-O-F要高出13.5%.实验证实激光器出光功率提升了17%.
Combining the vortex dissipation model and the Arrhenius reaction rate coefficient to describe the chemical reaction in the combustion chamber, three-dimensional numerical simulation of the flow field and the reaction flow field in the three intercalary injector and the combustion chamber was carried out. And mixing length parameters of the hybrid mechanism and the mixing effect of three intercrossing injector were obtained, the key parameters of the combustion chamber were obtained, such as the total temperature, the spatial distribution of the total temperature, the residence time of the air in the combustion chamber, etc. Fuel combinations were compared using the FOF, OFO injector and the combustion chamber flow characteristics were compared.For a certain fuel ratio and the length of the combustion chamber characteristics, the fuel combination using OFO, the F2 exit at the combustion chamber 13.5% higher than the FOF. Experiments show that the laser output power increased by 17%.