An experimental study of the fire protection performance of water mist spray subjected to thermal radiation was presented. Downward-directed water mist sprays to interact with an under. gasoline pool fire were experimentally investigated in underground environment. The mass mean diameters of water mist droplet were measured by PMAS under various flow conditions. The developed water mist spray nozzle was satisfied to the criteria of NFPA 750. The mechanism of the fire extinguishment by water mist spray was concluded to be cooling of the fire surface which lead to suppressed of' file1 evaporation. It was proved that the water mist spray system under. lower pressures could be applied to underground fire protection system.

Abstract
 1. 서론
 2. 물안개 분사 소화용 노즐 개발
 3. 실험 장치 및 방법
  3.1 노즐 분무특성 실험장치
  3.2 화재 시험장치
 4. 결과 및 고찰
  4.1 노즐 분무 특성실험
  4.2 화재시험
 5. 결론
 참고문헌

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• 김용판(양산대학 기계설비과) | Y. P. Kim
• 문철진(양산대학 자동차과) | C. J. Moon
• 이을우(삼호전설주식회사) | E. W. Lee
• 이전우(삼호전설주식회사) | J. W. Lee
• 최현호(삼호전설주식회사) | H. H. Choi