| 引用本文: | 康忠涛,李清廉,邹建军,等.气液比对液体中心式气液同轴离心喷嘴燃烧过程的影响.[J].国防科技大学学报,2018,40(6):52-60.[点击复制] |
| KANG Zhongtao,LI Qinglian,ZOU Jianjun,et al.Effects of gas liquid ratio on the combustion of liquid centered swirl coaxial injector[J].Journal of National University of Defense Technology,2018,40(6):52-60[点击复制] |
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| 气液比对液体中心式气液同轴离心喷嘴燃烧过程的影响 |
| 康忠涛1,2,3, 李清廉2,3, 邹建军2,3, 成鹏2,3 |
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(1.中国空气动力研究与发展中心 超高速空气动力研究所 高超声速冲压发动机技术重点实验室， 四川 绵阳 621000;2.国防科技大学 高超声速冲压发动机技术重点实验室， 湖南 长沙 410073;3.国防科技大学 空天科学学院， 湖南 长沙 410073)
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| 摘要: |
| 为了分析气液比对液体中心式气液同轴离心喷嘴燃烧过程的影响，针对一台采用液体中心式气液同轴离心喷嘴的燃气发生器在不同气液比下进行热试，并对试验结果进行深入分析。结果表明：随着气液比的增加，燃烧过程存在三种状态——稳定燃烧、稳定燃烧过渡到低频不稳定燃烧、低频不稳定燃烧。这种低频不稳定燃烧与供应系统的振荡无关，是由气液比增加造成三岔火焰远离喷注面板，当三岔火焰到达喷雾撞击点后火焰稳定性降低，使得火焰在回流区内前后振荡引起的。 |
| 关键词: 同轴离心喷嘴 气液比 燃烧不稳定 |
| DOI：10.11887/j.cn.201806008 |
| 投稿日期：2017-10-09 |
| 基金项目:国家自然科学基金资助项目（11472303，11402298）；新世纪优秀人才支持计划资助项目（NCET-13-0156）；国家重点基础研究发展计划资助项目（613239） |
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| Effects of gas liquid ratio on the combustion of liquid centered swirl coaxial injector |
| KANG Zhongtao1,2,3, LI Qinglian2,3, ZOU Jianjun2,3, CHENG Peng2,3 |
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(1.Science and Technology on Scramjet Laboratory, Hypervelocity Aerodynamic Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China;2.Science and Technology on Scramjet Laboratory, National University of Defense Technology, Changsha 410073, China;3.College of Aeronautics and Astronautics, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| In order to analyze the influence of gas liquid ratio on the combustion of liquid centered swirl coaxial injector, hot tests were conducted with a combustion gas generator under different gas liquid ratio. This combustion gas generator was equipped with liquid centered swirl coaxial injector. The results show that there exist three combustion conditions: stable combustion, transition from stable combustion to low frequency combustion instability and low frequency combustion instability. The low frequency combustion instability is not related to the oscillation of the supply system. It occurs because the triple flame moves away from the injection panel, when the triple flame arrives at the point of the impinging sprays, the stability of the triple flames decrease rapidly, making the flame front oscillating in the recirculation zone. |
| Keywords: swirl coaxial injector gas liquid ratio combustion instability |
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