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在激波风洞一激波管组合设备上开展了碳氢燃料超声速预混可燃气流的点火与燃烧实验研究。实验结果表明:利用激波对燃料进行预热,并以高温燃气作为引导火焰,可以有效缩短汽油空气超声速可燃混气的点火延迟时间,使之缩短到 0.2 ms以下。利用纹影照片对超声速燃烧流场结构作出了分析;研究了超声速预混可燃气流的温度以及当量比对超声速燃烧流场结构、点火与火焰传播特性的影响。
An experimental study on ignition and combustion of hydrocarbon pre-mixed combustible gas stream with hydrocarbon fuel was carried out on a shock wave wind tunnel and a shock wave tube assembly equipment. The experimental results show that using shock wave to preheat the fuel and using high-temperature gas as the pilot flame can effectively shorten the ignition delay time of the supersonic combustible mixture gas to less than 0.2 ms. The structure of supersonic combustion flow field was analyzed by using smear photographs. The effects of temperature and equivalence ratio of supersonic combustible gas flow on the structure of supersonic combustion flow field, ignition and flame propagation were studied.