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| 超燃冲压发动机羟基/煤油-PLIF同步测量研究 |
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武国华1,2，于欣1,2，彭江波1,2，曹振1,2，高龙1,2，韩明宏1,2，袁勋1,2，刘文备1,2，亓金浩1,2
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1.哈尔滨工业大学 航天学院 可调谐激光技术国家重点实验室，黑龙江 哈尔滨 150001;2.哈尔滨工业大学 光电子技术研究所，黑龙江 哈尔滨 150001
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| 摘要: |
| 应用一套500 Hz PLIF（Planar laser induced fluorescence）系统开展了煤油燃料超燃冲压发动机实验研究，实现了超燃冲压发动机燃烧室内火焰结构和煤油分布可视化测量。通过对OH-PLIF和煤油-PLIF同步测量方法分析，揭示了超燃冲压发动机煤油掺混燃烧振荡特性规律。利用PLIF图像的几何特征、强度特征和动态模态分解，分析了煤油掺混过程对火焰传播及燃烧特性的影响。研究表明，在煤油单独燃烧阶段，煤油主要分布在燃烧室上游。OH基受燃料分布的影响，在燃烧室内重复性地聚集和扩散，呈现破裂带状。动态模态分解结果表明，煤油掺混过程对燃烧振荡存在影响。 |
| 关键词: 超燃冲压发动机 燃烧室 平面激光诱导荧光 动态模态分解 可视化测量 |
| DOI：10.13675/j.cnki.tjjs.2210098 |
| 分类号:V231.1 |
| 基金项目:国家自然科学基金（62175053）；黑龙江省自然科学基金（LH2021F028）；中央高校基本科研业务费专项资金（XNAUEA5740000221-05）；哈尔滨工业大学科研创新基金（HIT.NSRIF202245）。 |
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| Simultaneous measurements of OH/kerosene-PLIF in scramjet |
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WU Guohua1,2, YU Xin1,2, PENG Jiangbo1,2, CAO Zhen1,2, GAO Long1,2, HAN Minghong1,2, YUAN Xun1,2, LIU Wenbei1,2, QI Jinhao1,2
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1.National Key Laboratory of Science and Technology on Tunable Laser，School of Astronautics， Harbin Institute of Technology，Harbin 150001，China;2.Institute of Opt-Electronics，Harbin Institute of Technology，Harbin 150001，China
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| Abstract: |
| Visual measurement of flame structure and kerosene distribution in a kerosene fueled scramjet combustor is realized with using a 500 Hz PLIF（Planar laser induced fluorescence）system. The law of kerosene mixing process on combustion oscillation characteristics of scramjet is investigated by the images of OH-PLIF and kerosene-PLIF which obtained simultaneously. The influence of kerosene mixing process on flame propagation and combustion characteristics is analyzed by using the geometric characteristics， intensity characteristics and dynamic mode decomposition of PLIF images. The results show that kerosene is mainly distributed upstream of the combustion chamber during the stage of kerosene combustion alone. Due to the influence of fuel distribution， OH signals repeatedly gather and diffuse in the combustion chamber， showing a rupture band. Dynamic mode decomposition （DMD） shows that kerosene mixing process has an effect on combustion oscillation. |
| Key words: Scramjet Combustion chamber Planar laser induced fluorescence Dynamic mode decomposition Visual measurement |
