Paramtric Study of Fuel Vapor Concentration Distribution Due to Vaporization of Fuel Droplets in Free Atmosphere

The growth of a two-phase cloud of a liquid fuel in a stagnant atmosphere is studied using computational fluid dynamic techniques. In order to predict the danger and hazard of such cloud in open atmosphere it is very important to determine the fuel concentration in the cloud, especially in the far field region from the fuel reservoir. The results show that with omission of droplets break up, the vaporization rate becomes very low due to large droplets and vapor cloud would be highly elongated. If the collision of droplets is neglected, vapor volume is higher. The results also show that when the height of device is increased, the cloud will have more symmetry. Any decrease in injection velocity leads to lower radial expansion of cloud. Reduction of injection time duration decreases the dangerous part of cloud slightly.