基于MATLAB GUI的池火灾热辐射特性虚拟仿真实验与可视化教学

Virtual simulation experiment and visual teaching of thermal radiation characteristics from pool fires based on MATLAB GUI

为了改善火灾动力学和火灾风险评估课程的教学效果,让学生更直观理解池火灾对周围人和物产生的热辐射损伤,基于MATLAB软件进行GUI界面设计,采用5种辐射模型对池火周围一维坐标轴、二维平面和三维曲面上的辐射热流密度分布情况进行预测和对比。结果表明,在水平方向上,目标点距离火焰中心轴线越近,所受辐射热流密度越大;在垂直方向上,目标点所受辐射热流密度随高度的增加先增加后减小。该虚拟仿真系统界面具有简洁易懂、操作方便、计算结果图形化和可视化的特性,将其应用于消防工程或安全工程专业的辅助教学,可提高教学质量。

In order to improve the teaching effect of“Fire dynamics”and“Fire risk assessment”,and make students more intuitively understand the thermal radiation damage caused by pool fire to surrounding people and objects,the GUI interface is designed based on MATLAB software.Five radiation models are used to predict and compare the distribution of radiant heat flux on one-dimensional coordinate axis,two-dimensional plane and three-dimensional curved surface around the pool fire.The results show that the radiation heat flux increases as the target approaches the flame in the horizontal direction,while the radiant heat flux firstly increases and then decreases as the height of the target increases in the vertical direction.The user interface of the simulation experiment is easy to understand and operate,with the graphical and visual calculation results.It can really help to increase the teaching quality as an aided instruction in the major of“Fire protection engineering”or“Safety engineering”.