1.中国空气动力研究与发展中心 高超声速冲压发动机技术重点实验室,四川 绵阳 621000
2.中国空气动力研究与发展中心 设备设计与测试技术研究所,四川 绵阳 621000
3.西北工业大学 动力与能源学院,西安 710072
王林森(1993-),男,实习研究员,硕士,主要从事流场显示及测量研究。E⁃mail:1729560285@qq.com
陈爽(1979-),男,副研究员,博士,主要从事燃烧流场激光光谱诊断、湍流燃烧实验研究。E⁃mail:chenshuang827@gmail.com
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王林森, 涂晓波, 王宇航, 等. 基于acetone⁃PLIF技术的超燃冲压发动机燃烧室燃料/空气掺混特性[J]. 航空动力学报, 2021,36(8):1614-1620.
Linsen WANG, Xiaobo TU, Yuhang WANG, et al. Fuel/air mixing characteristics of scramjet combustor based on acetone⁃PLIF technology[J]. Journal of Aerospace Power, 2021, 36(8): 1614-1620.
王林森, 涂晓波, 王宇航, 等. 基于acetone⁃PLIF技术的超燃冲压发动机燃烧室燃料/空气掺混特性[J]. 航空动力学报, 2021,36(8):1614-1620. DOI: 10.13224/j.cnki.jasp.20200444.
Linsen WANG, Xiaobo TU, Yuhang WANG, et al. Fuel/air mixing characteristics of scramjet combustor based on acetone⁃PLIF technology[J]. Journal of Aerospace Power, 2021, 36(8): 1614-1620. DOI: 10.13224/j.cnki.jasp.20200444.
针对超燃冲压发动机燃烧室内燃料/空气掺混特性,设计了一套以acetone⁃PLIF(planar laser⁃induced fluorescence)为技术手段的流动显示测量系统,得到了4种不同结构交错楔形支板在不同特征截面处的丙酮荧光图像,研究了喷嘴位置和尾缘角这两个变量对燃料/空气掺混效果的影响。结果表明:“基准”支板NL1的流场结构主体上表现为横向“S”形曲线,燃料/空气的掺混效果相对普通;NL2支板虽然增大了一些丙酮的扩散范围,但有荧光信号的掺混区域面积却反而有所下降;而引入扩张型尾缘角变量的EL1支板则是大幅改善了燃料/空气的掺混效果,54 mm截面的丙酮分子充满了较大片区域,掺混区域超过截面的1/2。
In order to study fuel/air mixing characteristics in scramjet combustor,a non-invasive flow visualization system was designed based on acetone-PLIF (planar laser-induced fluorescence) technology.The acetone fluorescence images of four kinds of shaped struts were obtained at different sections,and the effects of nozzle position and trailing edge angle on fuel/air mixing were studied.The results showed that the flow field of the “standard” NL1 strut was of a transverse “S” curve,which had normal mixing effect in the four struts.The NL2 strut increased a few acetone diffusion range,but decreased mixing area with fluorescence signals.The EL1 strut with an expanded trailing edge angle can greatly improve effect,since the acetone molecules filled over a half of the cross section at 54 mm downstream the strut.
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