| 环境压力对细水雾喷雾特性影响的实验研究 |
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| 引用本文： | 蔡昕,王喜世,廖光煊.环境压力对细水雾喷雾特性影响的实验研究[J].防灾减灾工程学报,2012,32(2):235-241. |
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| 作者姓名： | 蔡昕 王喜世 廖光煊 |
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| 作者单位： | 中国科学技术大学火灾科学国家重点实验室,合肥,230026 |
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| 基金项目： | 国家重大基础研究计划(973计划)项目，中央高校基本科研业务费专项资金青年创新基金 |
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| 摘 要： | 雾滴的粒径分布、喷雾强度、雾滴动量及雾场的分布形式等喷雾特性,直接影响细水雾的灭火性能。本文通过研究压力漩流雾化实心锥及空心锥喷嘴在不同环境压力下的喷雾特性,揭示了环境压力对细水雾喷嘴流量系数及其雾场分布的影响规律。实验结果表明:环境压力越小,雾滴越向雾场锥面集中,雾场边缘区域的喷雾强度越大,而中心区域喷雾强度随之减小;环境压力对细水雾喷嘴流量系数则无明显影响。
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| 关 键 词： | 细水雾灭火技术 环境压力 雾场特性 喷雾强度 |
Experimental Study on Effects of Ambient Pressure on Spray Characteristics of Water Mist |
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| CAI Xin
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WANG Xi-shi
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LIAO Guang-xuan.Experimental Study on Effects of Ambient Pressure on Spray Characteristics of Water Mist[J].Journal of Disaster Prevent and Mitigation Eng,2012,32(2):235-241. |
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| Authors: | CAI Xin WANG Xi-shi LIAO Guang-xuan |
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| Institution: | (State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230026,China) |
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| Abstract: | The droplet size distribution,spray intensity,droplet momentum and droplet distribution mode are key factors that directly influence the fire-extinguishing efficiency of water mist system.This paper researches the effects of ambient pressure on flow coefficient of water mist nozzle and droplets spatial distribution,based on investigating the characteristics of a swirl solid-cone and hollow-cone nozzle under different ambient pressure conditions.The results show that the smaller the ambient pressure is,the denser the droplets will be at the edge area of the spray cone,i.e.,few droplets tend to center area within the spray cone when ambient pressure reduced.However,there is no obvious effect of ambient pressure on flow coefficient of water mist nozzle. |
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| Keywords: | water mist fire-extinguishing technique ambient pressure mist field characteristics spray intensity |
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