Abstract
Experimental study was carried out using a single circular fire source in an unconfined space to understand the behaviour of the trajectory how it depends on the cross-winds and heat release rate. The position of the trajectory was defined with the aid of the three dimensional measured temperature data in downwind field. It is observed that the trajectory oscillates with time in cross-winds. In order to estimate the plausible position of the trajectory, we employed the position where the time-averaged maximum temperatures appear. The trajectory of the inclined fire plume was modelled with logistic function, and the variables including in the model were represented by the coupled function of Froude number and dimensionless heat release rate. This model gave the good agreement with those estimated by the measured data.
