Abstract
This study focuses on potential gas leakage scenarios during the natural gas transportation process in ship engine room. A three-dimensional model of the ship engine room is constructed to investigate the diffusion patterns of leaked gas and the resulting explosion and disaster risks. The results reveal that natural gas exhibits the highest concentration along the jet direction, with the concentration remaining above 5% by 360 s after the leakage. When an explosion intensity of 5 is chosen, the calculated results from TNO multi-energy method show an average relative error of less than 10% compared to the numerical simulations beyond 20 m. In the rear of obstacles, the peak overpressure decreases by 60%, and the time to reach the peak overpressure extends to 1.8 times the original duration. The range of slight building damage caused by explosion overpressure is the largest, averaging about twice the range of minor injuries to personnel.
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