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超燃燃烧室气流参数诊断
MEASUREMENT OF FLOW PARAMETERS IN A SCRAMJET COMBUSTOR BASED ON NEAR-INFRARED ABSORPTION
查看参考文献10篇
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文摘
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基于可调谐二极管激光器吸收光谱技术，利用7185.597 cm~(-1),7444.35cm~(-1) + 7444.37 cm~(-1)（重合吸收线）两条H_2O吸收线，采用分时扫描-直接探测策略组建多光路吸收测量系统，在4kHz的测量频率下，定量测量了燃烧室气流的静温、水蒸气浓度和流向速度.利用位移机构，在以C_2H_4为燃料的超燃直连式试验台中，在单次试验中同时诊断燃烧室内某截面和燃烧室出口的多气流参数的截面分布.利用燃烧室出口截面的水蒸气浓度分布，并结合壁面静压计算燃烧效率；利用燃烧室出口截面的静温和速度分布，获得出口气流马赫数分布；利用凹腔后部某截面的温度和水蒸气浓度分布，判读了凹腔附近流场特征。 |
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其他语种文摘
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A multi-channel tunable diode laser absorption spectroscopy (TDLAS) system was constructed to measure flow parameters in a direct-connected scramjet test facility fueled with ethylene. Two fibers coupled distributed feedback (DFB) lasers with narrow line width were used to probe two H_2O absorption featuresby using direct absorption time-division-multiplexing (TDM) strategy at a 4 kHz scan rate. Flow parameters were measured, which included the distribution of temperature, water vapor concentration and velocity at the exit cross section of the combustor, the distribution of temperature and water vapor concentration in the cross section near the cavity. Combustion efficiency was obtained by using the water vapor partial pressure distribution and the wall static pressure. Mach number distribution was deduced from the temperature and velocity parameters distributions at the exit cross section of the combustor, and the distributions of temperature and water vapor concentration in the cross section near the cavity were used to analyze combustion characteristics in the combustor. |
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来源
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力学学报
,2011,43(6):1061-1067 【核心库】
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关键词
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可调谐二极管吸收光谱技术
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温度分布
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速度分布
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超声速燃烧
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燃烧效率
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地址
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中国科学院力学研究所, 高温气体动力学国家重点实验室, 北京, 100190
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0459-1879 |
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学科
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航空 |
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基金
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国家自然科学基金资助项目
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文献收藏号
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CSCD:4403213
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