There is a great challenge for designers, operators as well as regulators to keep marine installations/vessels safe over its entire working life. Among these challenges, fire safety is one of the most pertinent ones. Historical evidence suggests that fire hazard is one of the biggest threats to the safety of ships, offshore platforms and to human life onboard. The present regulations are unable to cater the need of new innovative design as such the first principle based approach are sought after in this regard computational fluid dynamics(CFD) plays a important role in defining new rules and regulations for fire safety in ship's and other marine installation. Computational Fluid Dynamics has ability to simulate the fire scenarios for fire induced flows, which can lead to an improved prediction of fire and smoke propagation outside the room of origin and it can be served as a useful tool for human evacuation analysis also. This study was intended to provide information on quantifying the fire dynamics considering the effect of fire suppression using Reynolds Averaged Navier-Stokes Equation (RANSE) based solver. ANSYS-CFX has the ability to predict the changes in the temperature field and other fire dynamic parameters after the activation of water mist system. In the present study crew's accommodation deck of an offshore supply vessel has been modelled for different fire sizes. Three different levels of heat sources of size 45kW, 75kW and 100kW with and without water mist were simulated and results were analyzed. The results for mass flow rate of gas leaving the fire origin room were predicted and quantified comparisons were made.
Accidents and consequences of fire may occur at any time during the life of vessel, if appropriate action is not taken it may lead to loss in property and to human's life onboard.
