In order to consider the influence of steel pole on the measurement of wind speed sensors and determinate the installation position of wind speed sensors, the flow field around wind speed sensors was investigated. Bas...In order to consider the influence of steel pole on the measurement of wind speed sensors and determinate the installation position of wind speed sensors, the flow field around wind speed sensors was investigated. Based on the three-dimensional steady Reynolds-averaged Navier-Stokes equations and k-ε double equations turbulent model, the field flow around the wind speed sensor and the steel pole along a high-speed railway was simulated on an unstructured grid. The grid-independent validation was conducted and the accuracy of the present numerical simulation method was validated by experiments and simulations carried out by previous researchers. Results show that the steel pole has a significant influence on the measurement results of wind speed sensors. As the distance between two wind speed sensors is varied from 0.3 to 1.0 m, the impact angles are less than ±20°, it is proposed that the distance between two wind speed sensors is 0.8 m at least, and the interval between wind speed sensors and the steel pole is more than 1.0 m with the sensors located on the upstream side.展开更多
AQ 1029—2007《煤矿安全监控系统及检测仪器使用管理规范》有关传感器设置拟修订的主要内容包括:采煤工作面回风隅角设置甲烷传感器;煤与瓦斯突出煤层采煤工作面进风巷和掘进工作面的进风分风口处增设甲烷传感器;"便携式甲烷检测...AQ 1029—2007《煤矿安全监控系统及检测仪器使用管理规范》有关传感器设置拟修订的主要内容包括:采煤工作面回风隅角设置甲烷传感器;煤与瓦斯突出煤层采煤工作面进风巷和掘进工作面的进风分风口处增设甲烷传感器;"便携式甲烷检测报警仪"修改为"便携式无线甲烷检测报警仪",增加了无线传输要求;增加掘锚一体机、连续采煤机、锚杆钻车、梭车、矿用防爆型柴油机车、无轨胶轮车等瓦斯监测要求;煤与瓦斯突出煤层采煤工作面回风巷和掘进巷道回风流中增设风速传感器;煤与瓦斯突出煤层采煤工作面进风巷和掘进巷道的进风分风口处增设风向传感器等。展开更多
基金Projects(U1334205,51205418)supported by the National Natural Science Foundation of ChinaProject(2014T002-A)supported by the Science and Technology Research Program of China Railway CorporationProject(132014)supported by the Fok Ying Tong Education Foundation of China
文摘In order to consider the influence of steel pole on the measurement of wind speed sensors and determinate the installation position of wind speed sensors, the flow field around wind speed sensors was investigated. Based on the three-dimensional steady Reynolds-averaged Navier-Stokes equations and k-ε double equations turbulent model, the field flow around the wind speed sensor and the steel pole along a high-speed railway was simulated on an unstructured grid. The grid-independent validation was conducted and the accuracy of the present numerical simulation method was validated by experiments and simulations carried out by previous researchers. Results show that the steel pole has a significant influence on the measurement results of wind speed sensors. As the distance between two wind speed sensors is varied from 0.3 to 1.0 m, the impact angles are less than ±20°, it is proposed that the distance between two wind speed sensors is 0.8 m at least, and the interval between wind speed sensors and the steel pole is more than 1.0 m with the sensors located on the upstream side.
