| 表面辐射热损失对微重力静止环境下火焰传播特性的影响 |
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| 引用本文： | 孔文俊,王伟刚. 表面辐射热损失对微重力静止环境下火焰传播特性的影响[J]. 工程热物理学报, 2005, 26(1): 167-170 |
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| 作者姓名： | 孔文俊 王伟刚 |
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| 作者单位： | 中国科学院工程热物理研究所,北京,100080;中国科学院工程热物理研究所,北京,100080 |
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| 摘 要： | 采用数值模拟方法研究了静止微重力环境中,表面辐射热损失对燃料表面火焰传播特性的影响以及表面辐射和压力对火焰传播特性的共同影响。结果表明,随着表面辐射增大,火焰传播速度减小,在考虑表面辐射后,随着压力的增大,火焰传播速度增大。采用无量纲参数分析了表面辐射对火焰传播速度的影响,进一步阐明了微重力环境下的火焰传播机理。
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| 关 键 词： | 表面辐射热损失 火焰传播 热薄固体燃料 |
| 文章编号： | 0253-231X(2005)01-0167-04 |
| 修稿时间： | 2004-01-18 |
EFFECTS OF SURFACE RADIATION ON FLAME SPREAD OVER THERMALLY-THIN FUELS IN A QUIESCENT MICROGRAVITY ENVIRONMENT |
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| KONG Wen-Jun,WANG Wei-Gang. EFFECTS OF SURFACE RADIATION ON FLAME SPREAD OVER THERMALLY-THIN FUELS IN A QUIESCENT MICROGRAVITY ENVIRONMENT[J]. Journal of Engineering Thermophysics, 2005, 26(1): 167-170 |
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| Authors: | KONG Wen-Jun WANG Wei-Gang |
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| Abstract: | The effects of surface radiation and the combined effects of surface radiation and pressure on flame spread over thermally-thin fuels in a quiescent microgravity environment were investigated numerically. Results show that the effects of surface radiation and the combined effects of surface radiation and pressure on flame spread were significant. The flame spreading velocity decreased with increasing the surface radiation. The flame spreading velocity increased with increasing the ambient pressure as the effects of the surface radiation were considered in the equations. A non-dimensional parameter was proposed to analyze the effects of the surface radiation on the flarne spreading characteristics to further clarify the flame spreading mechanisms under microgravity environment. |
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| Keywords: | surface radiation flame spread thermally thin solid fuels |
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