巷壁与空气热湿交换规律数值模拟研究

为探讨矿井通风过程中巷壁与风流的热湿交换规律,更好地保证井下员工生命安全,运用Fluent求解器对热湿交换过程进行数值模拟。以正交试验设计为方法,选定影响巷壁与空气的热湿交换规律的10个因素进行正交试验。采用极差分析法和相关性分析法分析试验所得结果,探讨各因素对终点温度和终点相对湿度的影响。结果表明:对终点温度影响较大的3个因素依次为巷道壁温、巷道长度、进风温度,且都表现出正相关性。巷道壁面湿度对终点湿度影响最明显,成正相关,剩余各因素影响较小。最后对正交试验所得数据进行多元线性回归,得出拟合方程,将此用于风温和空气湿度预测。

Numerical Simulation of Heat-moisture Exchange between Tunnel Wall and Airflow

To study the law of heat-moisture exchange between tunnel wall and airflow and ensure the safety of underground workers,a numerical simulation of the process of heat-moisture exchange was made using Fluent solver.Based on the orthogonal test design method,10 factors affecting heat-moisture exchange between tunnel wall and airflow were chosen for the test.Then the influence of each factor on the endpoint temperature and endpoint relative humidity was discussed by the methods of range analysis and correlation analysis.The results showed that 3 factors had a greater impact on endpoint temperature,and the effect worked in the following order: tunnel wall temperature,tunnel length and inlet air temperature,all of which showed a positive correlation with the endpoint temperature.Besides,tunnel wall humidity was the most obvious factor affecting the endpoint humidity and there was a positive correlation between them,while the influence of the remaining factors was small.Finally,the data obtained from orthogonal test was analyzed with multiple linear regressions,and the fitted equation could be used to forecast air temperature and air humidity.