矿用通风服衣内空间气流分配数值模拟研究

doi:10.16265/j.cnki.issn1003-3033.2023.12.0254

摘要/Abstract

摘要：

为提高矿用通风服的降温性能,探究矿用通风服衣内空间气流分配及不同管路结构对降温效果的影响,首先结合人体着装通风服在静止状态下的结构特征,建立3种不同管路结构的三维物理模型;然后运用数值模拟方法分析人体-通风服衣内空间气体流动变化机制与温度分布特征及衣内微环境温度分布特征,以判断通风服降温效果。结果表明:人体分别着3种矿用通风服时所形成的人体-通风服间的衣内微环境气流分配均匀性为横向型优于螺旋型、纵向型,而微环境气流总风量为螺旋型大于纵向型、横向型;针对管路结构而言,交叉的管路结构在很大程度上影响气流的利用率,螺旋型只有单支通气管,气流随着管路的弯曲沿程流动,减少气流在管路中的局部阻力,同时也提高气流利用率,螺旋型是管路结构的最优选择。微环境内部总风量影响服装降温效果, 3种矿用通风服的降温性能为螺旋型优于纵向型、横向型。

关键词: 矿用通风服, 衣内空间, 气流分配, 数值模拟, 管路结构, 降温性能

Abstract:

In order to improve the cooling performance of mine ventilation clothing and explore the air distribution law in mine ventilation clothing and the influence of different pipeline structures on the cooling effect, this paper established three-dimensional physical models of three different pipeline structures based on the structural characteristics of human body wearing ventilation clothing in static state. The numerical simulation method was used to analyze the mechanism of air flow change and temperature distribution characteristics in the space of human body-ventilated clothing, and the temperature distribution characteristics in microenvironment of clothing were analyzed to judge the cooling effect of ventilation clothing. The results show that the airflow distribution uniformity of the microenvironment under the underwear of the human body-ventilation room formed when the human body wears three kinds of mine ventilation clothes is better than that of the spiral type and the longitudinal type. The total airflow volume of the microenvironment of spiral type is higher than that of longitudinal type and transverse type. For the pipeline structure, the cross pipeline structure greatly affects the utilization rate of airflow. The spiral type has only a single ventilation pipe, and airflow flows along the bend of the pipe, which reduces the local resistance of airflow in the pipeline and improves the airflow utilization rate. Therefore, the spiral type is the optimal choice for pipeline structure. The total air volume inside the microenvironment affects the cooling effect of the clothing. The cooling performance of the three kinds of mine ventilation clothing is that spiral type is better than longitudinal type and transverse type.

Key words: mine ventilation clothing, inner space, air distribution, numerical simulation, pipeline structures, cooling performance

游波, 杨娇, 吴国珊, 韩巧云, 杨芯宇. 矿用通风服衣内空间气流分配数值模拟研究[J]. 中国安全科学学报, 2023, 33(12): 104-112.

YOU Bo, YANG Jiao, WU Guoshan, HAN Qiaoyun, YANG Xinyu. Numerical simulation study on air distribution in space of mine ventilation clothing[J]. China Safety Science Journal, 2023, 33(12): 104-112.

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