Method for investigation of combustion flowfield characteristics in single element gas/gas injector chamber
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摘要: 为了方便开展单喷嘴气气喷注器燃烧试验研究,设计了一种燃烧室壁面测温,并结合推力室燃烧流场的非稳态数值模拟的方法,以考察燃烧室内流场的发展和燃烧完成情况.应用试验数据对不同的湍流模型和燃烧模型进行了对比研究,得到与试验结果较为吻合的计算模型.并应用该方法开展了同轴剪切式喷注器氢/氧喷注动量比、燃烧室压力变化的试验研究.试验结果表明喷注器掺混燃烧效果随氢/氧喷注动量比增加而增强,而不随燃烧室压力的变化而变化.Abstract: To facilitate hot-fire tests of single element gas/gas injector chamber, a method used to reveal the combustion development and completion length of the chamber flowfield was designed, which combines wall temperature measurement and numerical simulation of gas/gas combustion flowfield. The impacts of using various turbulence and combustion models was investigated to obtain the models which best represented the experimental data. And influences of H2/O2 momentum ratio and chamber pressure on shear-coaxial injector combustion flowfield were investigated. The result shows that the better mixing and the shorter combustion length can be obtained with the larger H2/O2 momentum-ratio and the chamber pressure can hardly influences the combustion flowfield.
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Key words:
- measurement method /
- combustion flowfield /
- gas/gas injector /
- combustor /
- numerical simulation
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