Abstract: The high-pressure fire water curtain plays an important role in cutting off the development of fire spread between buildings, and can solve the problem of insufficient fire seperation distance between buildings in wood structure building complexes effectively. In order to explore the adaptability of high-pressure fire water curtain in wood structure building complexes, this paper selects typical bucket-type residential buildings as the research object, and uses FDS to analyze the thermal insulation effect of high-pressure fire water curtain under different layout forms and water mist particle sizes, and combines the full-scale fire experiment to verify the effectiveness of the results. The results show that the high-pressure fire water curtain has good thermal insulation efficiency under different working conditions, and the thermal insulation efficiency is the best under the working condition of 1.5 m and 300 μm particle size, which is about 60.92%. The addition of high-pressure fire water curtain can effectively reduce the ignition distance of the burning building, and the maximμm ignition distance is reduced by about 44%. The thermal insulation efficiency based on the fire scene experiment is in good agreement with the simulation results, and the relative error of the thermal radiation intensity insulation efficiency of the simulated value and the experimental value at 4 m and 8 m is less than 5%.

Key words: timber structure, high pressure fire water curtain, FDS, fire seperation distance, effect heat insulation efficiency