Numerical calculation of temperature distribution of lining based on standard fire curve and heat release rate
In order to find out the temperature distribution charac-teristics of the lining under fire,a one-dimensional numerical cal-culation method of heat transfer lining temperature was estab-lished based on the mathematical model of tunnel fire-lining radia-tive convective heat transfer.The HC standard fire curve and the fire condition of 30 MW fire heat release rate were calculated and analyzed.The results show that the maximum temperature of the standard fire curve is generally greater than that required by the current Chinese code.Using fire temperature as the boundary con-dition for the lining wall will significantly increase the temperature wad on the lining.The maximum temperature of the lining is 778 ℃ and 351 ℃ under the 2 hour HC fire curve and the 30 MW fire condition,respectively.The influence range and high temperature value of the lining inside the standard fire curve condition are sig-nificantly greater than those of the 30 MW fire condition.
tunnel liningheat transfer methodsheat release ratestandard fire curvestemperature characteristics
万方数据
维普
