| 摘要: |
| 在94mm×94mm方截面激波管上,入射激波马赫数为1 60～1 95内开展了汽油/空气可燃混合气体在激波聚焦方式下的点火实验。当汽油/空气混合比处于化学恰当比附近,激波马赫数为1 69～1 95的激波聚焦能够成功地引燃汽油/空气的可燃混合气体,而当入射激波马赫数低于1 69时,同样条件下的汽油/空气混合气体不能被点燃。流场的纹影照片显示,与未燃状态相比,汽油/空气可燃混合气体被引燃后的反射激波波面变宽。 |
| 关键词: 激波聚焦+ 可燃气体 点火试验 |
| DOI： |
| 分类号:V312 |
| 基金项目: |
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| Experimental investigation on ignition of combustible mixture by shock focusing |
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WANG Chun,HAN Zhao-yuan,SITU Ming
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1.Dept. of Modern Mechanics, China Univ. of Science and Technology, Hefei 230027, China;2.The 31st Research Inst., Beijing 100074, China
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| Abstract: |
| Experiments were conducted in a 94mm×94mm rectangular-cross-section shock tube to investigate the characteristics of ignition of combustible mixture by shock focusing with the incident shock Mach number range 1.60～1.95. The results show that combustible mixture of gasoline/air can be ignited by this type of shock focusing in the incident shock Mach number range 1.69～1.95, if gasoline/air mixture is near chemical stoichiometric ratio. When the incident Mach number is below 1.69, the gasoline/air mixture cannot be ignited with the same conditions. Compared with the cases of non-combustion, thicker front of reflected shock can be observed on the Schieren photos in the case of combustion. |
| Key words: Shock focusing~+ Combustible gas Ignition test |
