A jet fire is a fire caused by a single phase or two-phase combustible medium with certain pressure discharged from a limited size outlet.The discharge of two-phase flow from a LPG(liquefied petroleum gas) tank due to chemical,mechanical,or thermal effect can lead to a serious jet fire.A mathematical model was developed based on FDS to simulate the evolution of the jet fire and the radiation due to continuous discharge of propane from the LPG tank.The influence of wind was investigated.The radiation intensity of the flame was predicted in different conditions.The results indicate that a stronger wind can enhance the combustion,thus increase the radiation intensity of the flame.For the specific case simulated in the paper,the minimum safe distance predicted by the model is 25 meters,which agrees well with the result suggested by the point fire model.