Abstract
Air curtains have rectangular lateral shape in most of the current studies. Since they often fail to meet the dust control requirements of the special-shaped dust control area formed by space constraints and other factors, this problem can be solved by alternative development of trapezoidal air curtains (TAC). The core technology of such air curtain aimed at a special-shaped dust control area was proposed. Using numerical simulation via Fluent, the structural optimizations of air curtain unit were realized. The air supply effects of divergent and contracted TAC were compared, with the new calculation model of air volumes, which results were applied to the special-shaped dust control area. Numerical simulations verified by field application proved that under higher dust concentration conditions, the mixed air curtain case with added TAC outperformed the fully rectangular case by higher dust control efficiency (97.75% versus 96.16%), saving about 40.4% air volume.
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