置换通风模式下多元对流室内热与污染物输运

Combined convective heat and pollutant removals in enclosures with different vented slots

通过数值模拟的手段研究不同进出口布置方式对置换通风模式下混合对流开口腔内热质输运过程的影响,并且利用流函数、热函数和质函数深入研究与揭示开口腔内热与气态污染物的输运过程与机理,系统分析了不同控制参数对开口腔内的气体流动结构和热质输运能力的影响。结果表明不同的进出口布置方式在开口腔内热和污染物的输运及其室内扩散范围上展现了相反的双重效果:进出口布置在两侧的方式具有更大的热与污染物输运能力;进口在两侧底部,出口位于顶部的布置方式在开口腔内具有更小的热与污染物扩散半径。研究结果对室内热与污染物排放和控制以及电子器件冷却有一定的借鉴意义。

A numerical investigation of displacement ventilation on a heated and polluted strip within a partially open enclosure,having various locations of airflow inlet and outlet,is considered.The effects of different governing parameters on the fluid flow,heat and mass transfer were analyzed systematically.Results illustrated that the different arrangements of airflow inlet and outlet exhibit the dual effects on heat and mass transports and the radiuses of heat and mass dissipation within the enclosure.Both heat and mass transfer rates present larger values for the locations of inlet and outlet placed at the vertical sidewalls while they presents smaller radiuses of heat and mass dissipations for inlet and outlet placed at the two vertical and the top sidewalls,respectively.Results could be beneficial for heat and pollutant removals from the electronic boxes or building enclosures.