摘要
基于Lagrangian粒子小火焰点火的方式,采用混合分数燃烧模型和Clausius-Clapeyron蒸发速率方程,实现了矩形柴油池火蔓延的CFD模拟。针对80 cm×5 cm×2 cm矩形柴油油池进行火焰表面蔓延实验研究。将火焰温度和火焰蔓延速度的数值模拟结果与实验进行对比分析,验证了数值模拟的可靠性。研究表明,主火焰前方区域燃油蒸气浓度达到0.01 975mol/mol且燃油表面达到着火温度时,火焰会发生蔓延;火焰前锋面存在冷对流气相涡旋,以0.327 m/s的速度沿火焰锋面向上移动,并随火焰前锋面的摆动而向蔓延方向位移。
Based on the Lagrangian particle ignition,the CFD simulation of the fire spread of the diesel oil in rectangular pool was realized by using the mixed fraction combustion model and the Clausius-Clapeyron evaporation rate equation.At the same time,the experiment of flame spread on surface in80cm×5cm×2cm rectangular diesel oil pool was carried out.By comparing the experiment results of the flame temperature and spread velocity with thenumerical stimulation,the reliability of the simulation was verified.The research showed that when the fuel vapor concentration in front of the primary flame reaches0.01975mol/mol and the fuel surface reaches the ignition temperature,the flame will spread;there was a cold gas phase vortex on the flame front surface which moves upward along the surface at a rate of0.327m/s,while the vortex also displaced forward the surface with the wings of theflame front.
作者
苏石川
魏承印
王亮
冯德胜
崔海滨
郭晨宇
SU Shi-chuan;WEI Cheng-yin;WANG Liang;FENG De-sheng;CUI Hai-bin;GUO Chen-yu(College of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu 212003, China)
出处
《消防科学与技术》
CAS
北大核心
2018年第2期149-152,共4页
Fire Science and Technology
基金
国家自然科学基金项目(21406095)
