Compared with diesel fuel, liquefied natural gas(LNG) fuel has the advantages of high calorific value, low price and low emission, its application and wide popularization in the field of marine power have become an inevitable trend. LNG is often stored at low temperature. Once leaking, it will rapidly boil, vaporize and mix with air to form an explosive mixture, this is extremely dangerous. In order to control the fire risk of LNG-powered ship effectively, this paper took a large dual-fuel(LNG/diesel oil) c...