Modeling and Characteristic Analysis of the Flashover of Fire in a Ship Engine Room
With thermal radiation, the convective heat transfer and the pressure variation considered, a mathematics model of the flashover phenomenon in a ship engine room fire is established based on the first law of thermodynamics and the nonlinear principle. The fourth order Runge-Kutta method is used to solve the model. The characteristic of the flashover is analyzed from the aspects of the eigenvalue, the temperature, the pressure and the distance of flame propagation. The results show that the flashover have mutation feature. The point t=240s or R=0.203 as a critical value, and it changes the fire system from stable state into unsteady state. When the flashover occurred, the temperature increased rapidly with big slope, and the temperature change easing up after the fire system changing into the stable state again. Moreover, the pressure in the engine room has a mutation, and the pressure 1.0207 X 10 5Pa increased to 1.0341 X 105Pa in a short period of time, then the pressure maintains a certain stability. Computational results have important significance for the fire evaluation, the firefighting strategy and the personnel escape.
ship engine room fire flashover modeling critical point characteristic analysis
WANG Liang SU Shichuan NIE Yuhong
School of Naval Architecture and Ocean Eng., Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
国际会议
The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)
杭州
英文
610-615
2010-10-26（万方平台首次上网日期，不代表论文的发表时间）