煤矿避难硐室物理场耦合数值模拟研究

A Coupling Numerical Simulation Study on Physical Field of Coal Mine Underground Refuge Chamber

为研究煤矿井下避难硐室内部物理场分布及避险人员舒适度的问题,建立生存室有限元模型及数学计算模型,利用软件进行数值模拟研究.从进风速度、进风温度及进风方式三个方面进行研究,结果表明:增大进风速度使得内部速度分布不均匀但能有效的降低温度,降低送风温度对速度场分布影响小,送风温度在22℃以下.改进原有进风方式,人员热舒适性有所提高,静坐区温度场分布均匀小于27℃,速度场分布均匀小于0.3m/s,满足热舒适性要求.所得结论为保障硐室内部生存环境及制冷循环系统的改善提供重要参考.

Finite element model was developed. According to the basic theories of the fluid dynamic and heat transfer,fluid mechanics model and heat transfer model were determined,in order to study the distribution of flow field and temperature field and thermal comfort within the coal mine underground refuge chamber. With the help of FLUENT software,the numerical simulation was conducted in this paper. This paper conducts the research from three aspects： the air parameters such as velocity、temperature and ventilatory way. The results were estimated by using relevant ventilatory standards. They indicated that increasing the supply air velocity was helpful to reduce the temperature but the distribution of velocity field was uneven. Changing the temperature had no effect on the distribution of velocity field and temperature should be lower than 22℃. After optimizing the way,the temperature of sitting area dropped and well distributed,as well as the velocity field. Indoor temperature was lower than 27℃ and indoor air speed was less than 0. 3 meters per second to make people feel very comfortable. The results can offer valuable references for ventilation designing and environmental improvement.