本文成功搭建了适用于中国科学院力学研究所国家微重力实验室(NMLC)落塔的高压对冲火焰实验系统,并首次开展了微重力条件下加压对冲火焰实验,测定了一定张力条件下甲烷/空气层流预混火焰的熄灭极限.实验结果表明,随着压力的增高,甲烷/空气混合气体的可燃极限呈先增后降的非单调变化趋势,峰值发生在0.4MPa左右.浮力对加压下微弱火焰熄灭极限的影响明显,在常重力条件下,相同张力下的熄灭极限较微重力条件下的偏大,峰值出现的压力略低.微重力条件下的实验结果与使用CHEMKIN的数值模拟的结果相当一致.
参考文献
| [1] | Williams F A.Combustion Theory[M].Benjamin-Cummings,Menlo Park,CA,1985 |
| [2] | Law C K.Combustion Physics[M].Cambridge:Cam-bridge Press,2006 |
| [3] | Law C K;Egolfopoulos F N.A Unified Chain-Thermal Theory of Fundamental Flammability Limits[A].,1992:137-144. |
| [4] | Zhang H;Egolfopoulos F N.Extinction of Near-Limits Premixed Flames in Microgavity[A].,2000:1875-1882. |
| [5] | Coward H F;Jones G W .Limits of Flammability of Guses and Vapors[R].Bureau of Mines Bulletin 503,1952. |
| [6] | Ronney P D;Wachman H Y .Effect of Gravity on Lam-inar Premixed Gas Combustion I:Flammability Limits and Burning Velocities[J].Combustion and Flame,1985,62:107. |
| [7] | Law C K;Zhu D L;Yu G.Propagation and Extinction of Stretched Premixed Flames[A].,1986:1419. |
| [8] | Maruta K;Yoshida M;Ju Y.Experimental Study on Methane-Air Premixed Flame Extinction at Small Stretch Rates in Microgravity[A].,1996:1283. |
| [9] | 徐旭常;毛健雄;曾瑞良.燃烧理论与燃烧设备[M].北京:机械工业出版社,1988 |
| [10] | Glassman I.Combustion[M].Academic Press,1996 |
| [11] | Ronney P D.understanding Combustion Processes through Microgravity Researches[A].,1998:2485. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%