Coupled Simulations of Indoor-Outdoor Flow Fields for Cross-Ventilation of a Building in a Simplified Urban Array

Influence of outdoor meteorological parameters on the indoor environment of blast furnace yard

The blast furnace tapping yard is a typical heavy-pollution industrial plant. Aiming at the problem of high temperature and high dust, the CFD model is established to simulate the coupling of indoor and outdoor wind environment, field measurement data are used to verify the simulation model, and then, the influence of outdoor meteorological parameters on the flow field and smoke emission of blast furnace discharge field is studied. The research results show that the impact of the outdoor wind environment on the air temperature, velocity, and PM2.5 concentration field in the workshop cannot be ignored, and the influence on dust removal in the blast furnace is significant. When the outdoor velocity increases or the temperature decreases, the ventilation volume in the workshop increases exponentially, the capture efficiency of PM2.5 by the dust cover gradually decreases, and the PM2.5 concentration in the working area gradually increases. The outdoor wind direction has the most significant influence on the ventilation volume of industrial plants and the capture rate of PM2.5 by a dust cover. For factories facing north from south, the southeast wind is an unfavorable wind direction with a small ventilation volume, and the concentration of PM2.5 in the area where workers are active exceeds 2.5 mg/m3. The concentration of the working area is affected by the dust removal hood and the outdoor wind environment. Therefore, outdoor meteorological conditions under the dominant wind direction in different seasons should be considered when designing the dust removal hood.