Extinction of Counterflow Diffusion Flame by Fine-Water Droplets

Report Date: March 2010

In this study, the role of the physical, thermal, and chemical effects of water mist on a fire are partly quantified experimentally by using a methane counter flow diffusion flame. It was found that there exists a critical diameter below which mist can evaporate within the flame zone. This evaporation causes cooling and the depletion of oxygen near the flame. Measurements also showed that the mist with large diameter passes through the flame zone.


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  • National Research Institute of Fire and Disaster

    The research and development division undertakes research for supporting firefighting and disaster prevention activities by placing particular emphasis on such research themes as are demanding immediate attention or are desired strongly by society. The following five laboratories are organized for the purpose.

    • Large-Scale Fire Lab
    • Hazardous Materials Lab
    • Hazmat Facility Lab
    • Earthquake and Natural Disaster Lab
    • Special Disaster Lab

Naito, Hiroyoshi, Yuri Hagiwara, Toru Uendo, Yuko Saso, Yoshinobu Kotani, and Akira Yoshida. Extinction of Counterflow Diffusion Flame by Fine-Water Droplets. Tokyo, Japan: Report of National Research Institute of Fire and Disaster, No. 108, p. 22, 2010. Print.

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