Investigation of Flame Height from Multiple Liquefied Natural Gas Fire
TC Ho, SC Fu, C YH Chao
HKUST
Abstract
The research of multiple liquefied natural gas fires is limited due to the unique condition of temperature and velocity. Therefore, the effect of the distance between multiple liquefied natural gas jet fires on the characteristics of the flame is investigated by numerical methods in this paper. Grid analyses have been carried out to establish sufficient resolution of the grid and to ensure the domain size is appropriate for jet fire cases. The temperature, velocity and concentration of the reactant inside the fire were calculated, and the shape of the flame was also studied. By changing the distance between the jets, the size and height of the fires are changed. Simulations of jet fires separated by different distances were carried out. Investigation of three discharge velocities (30, 40, 50 m/s) with different separation distances (0 - 28 m) were done. When the jets were close enough fires were observed to merge and were enhanced due to interaction. Both the flame height and the temperature increased. When the jets were separated by a significant distance, the flame height returned to the height of a single jet fire. The distance effect of multiple jet fires was investigated and reported in this paper.

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