SUPPRESSION OFFIRE AND GAS EXPLOSION BY WATER MIST

水雾灭火和瓦斯爆炸

• 批准号: 22310104
• 负责人: YOSHIDA Akira
• 金额: $ 11.4万
• 依托单位: Tokyo Denki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22310104/
• 关键词: 火災; 事故; 消火; ウォーターミスト; 燃焼; 爆発; 拡散火炎; 予混合火炎; 消防; 熱工学; 防災; 対向流拡散火炎; 火炎伸長率; 消炎

Water mist is environmentally acceptable as compared with Holon, and is attractive as an alternative fire suppressant. In the present study, we investigated experimentally and analytically the effect of water mist on the diffusion flame which appears in fires and the premixed flame which induces the gas explosion, on the basis of combustion science. The extinguishment of the diffusion flame is mainly affected by the ratio of mist mass fraction and mist diameter, which is defined as surface area parameter, and the evaporation Damkohler number. On the other hand, the burning velocity of premixed flame decreases with the water mist addition mainly due to the thermal effect which includes the latent heat of evaporation and heat capacity of water vapor. However, the chemical effect on the burning velocity cannot be neglected. Reduction of the burning velocity is mainly affected by the increase of mole fraction of added water mist. These results could be applied to the design of the water mist fire extinguishment system.

与 Holon 相比，水雾在环境上是可以接受的，并且作为替代灭火剂很有吸引力。在本研究中，我们以燃烧科学为基础，通过实验和分析研究了水雾对火灾中出现的扩散火焰和引起气体爆炸的预混火焰的影响。扩散火焰的熄灭主要受雾气质量分数与雾气直径之比（定义为表面积参数）和蒸发达姆科勒数的影响。另一方面，预混火焰的燃烧速度随着水雾的添加而降低，这主要是由于热效应，包括蒸发潜热和水蒸气的热容。然而，化学对燃烧速度的影响不容忽视。燃烧速度的降低主要受添加水雾摩尔分数的增加影响。这些结果可应用于细水雾灭火系统的设计。

项目成果

噴流拡散火炎の構造におよぼすウォーターミストの影響および消炎機構

细水雾对射流扩散火焰结构的影响及灭火机理

• 发表时间: 2010
• 作者: Kenji Sasa;Daisuke Terada;Shigeaki Shiotani;Eiichi Kobayashi;櫻井格
• 通讯作者: 櫻井格

Experimental study of suppressing effect of fine water droplets on propane/air premixed flames stabilized in the stagnation flowfield

• DOI: 10.1016/j.firesaf.2013.01.025
• 发表时间: 2013-05
• 期刊: Fire Safety Journal
• 影响因子: 3.1
• 作者: A. Yoshida;T. Udagawa;Y. Momomoto;H. Naito;Y. Saso

Effect of fine water droplets on extinguishment of diffusion flame stabilized in the forward stagnation region of a porous cylinder

• DOI: 10.1016/j.proci.2010.06.005
• 发表时间: 2011
• 作者: H. Naito;Toru Uendo;Y. Saso;Y. Kotani;A. Yoshida

ウォーターミストによる対向流拡散火炎の消炎-火炎近傍のウォーターミストの挙動と火炎構造-

通过水雾扑灭逆流扩散火焰 - 火焰和火焰结构附近水雾的行为 -

• 发表时间: 2010
• 作者: Aizawa;K.,T.Koyama,M.Uyeshima,H.Hase,T.Hashimoto,W.Kanda,R.Yoshimura,M.Utusgi,Y.Ogawa,K.Yamazaki;伊津見一彦，梶原康博，滝 聖子，江澤 昇，赤鹿智之;Akira Mita;上戸徹
• 通讯作者: 上戸徹

Extinguishment of propane/air co-flowing diffusion flames by fine water droplets

• DOI: 10.1016/j.proci.2012.06.046
• 发表时间: 2013
• 作者: I. Sakurai;J. Suzuki;Y. Kotani;H. Naito;A. Yoshida