| Title |
Effects of Surface Roughness on Evaporation Cooling of Single Water Droplet in Radiative Fields |
| Keywords |
Radiant heat ; 복사열 ; Water droplet ; 액적 ; Surface roughness ; 표면거칠기 ; Evaporation time ; 증발시간 ; Fire extinguishing ; 소화 ; Heat flux ; 열유속 |
| Abstract |
This paper presents the results of an experimental investigation for the effect of radiant heat on the evaporation cooling of water droplet in the process of fire extinguishing. The experiments are mainly focused on the surface temperature, the surface roughness and the droplet diameter. The range of surface temperature is80－140℃, surface roughness is0.08－0.64m and the droplet diameter is3.0mm in the radiation. The results show that the evaporation time is shorter for the larger surface roughness and the volume of droplet increased when the surface roughness is 0.64m at the surface temperature 127℃. When the surface roughness is 0.64m, the heat flux is larger than the surface roughness is 0.08m at the surface temperature 81℃. |