Numerical simulation study on air distribution in space of mine ventilation clothing

doi:10.16265/j.cnki.issn1003-3033.2023.12.0254

Abstract

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

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.

Figures/Tables 12

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