微重力和常重力环境中柱状固体材料表面火焰传播实验研究
Experimental Study on Flame Spread Over Cylindrical Solid Fuels in Micro and Normal-Gravity Environments
查看参考文献16篇
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文摘
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在微重力和常重力环境中,对不同氧气浓度下柱状聚甲基丙烯酸甲酯(PMMA)表面火焰传播现象进行了实验研究。微重力实验观测了低速强迫对流中的火焰传播,地面实验研究了浮力对流影响下火焰向下传播的规律,分析了氧气浓度与流动对火焰传播的影响。微重力和常重力下的火焰在形态和传播速度上具有显著区别。结合微重力和常重力的实验结果,将火焰传播速度随气流速度的变化关系分为三个区:辐射控制区,传热控制区和化学反应控制区。 |
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其他语种文摘
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Flame spread phenomena over a cylindrical polymethyl methacrylate (PMMA) at different oxygen concentrations have been experimentally studied under microgravity and normal gravity conditions. In microgravity experiments flame spread in low-speed forced flows was observed, and in normal gravity experiments downward flame spread behaviors in buoyancy-induced flows were investigated. The effects of oxygen concentration and flow velocity on flame spread were analyzed. The flame appearance and spread rate show significant differences in microgravity and normal gravity. Combining the results from the two sets of experiments, three distinct regimes are identified to delineate the variation of flame spread rate with gas flow velocity, namely microgravity radiation regime, heat transfer regime and chemical kinetics regime. |
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来源
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工程热物理学报
,2019,40(11):2672-2677 【核心库】
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关键词
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火焰传播
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柱状固体材料
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微重力
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浮力对流
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地址
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1.
中国科学院力学研究所, 中国科学院微重力重点实验室, 北京, 100190
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中国科学院大学工程科学学院, 北京, 100049
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0253-231X |
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学科
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能源与动力工程 |
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基金
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国家自然科学基金资助项目
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中国科学院战略性先导科技专项
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文献收藏号
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CSCD:6605818
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参考文献 共
16
共1页
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