Numerical Study of Injection Initial Condition Effects on Rotation of Flammable Region in a Fuel-Air Cloud

In this work, the effects of injection initial conditions on displacement and rotation of flammable region in a two-phase fuel–air cloud in open atmosphere have been studied numerically. Investigating the internal conditions of the cloud, we recognize the flammable region and study the effects of injection velocity, droplet initial size, and temperature on the behavior of this region. This study can designate the proper position for successful ignition. Validation was made by comparing the numerical and experimental results. Results show increasing injection velocity and initial size of droplet decreasing droplet initial temperature, increase the rotation of flammable region.