以数值模拟和实验验证相结合的方法研究了三维动态混合对流过程中的温度场发展规律,并定量地分析了在Re=1×105,Gr=±3.36×1012,Pr=0.7,L/H=3/4条件下矩形腔体内温度均匀性的动态变化特性.研究结果表明,对于相同大小的Grashof数和Reynolds数,当Gr＞0时,腔体内有着更高的升/降温速率,而其升/降温过程中的整体温度不均度则高于Gr ＜0时的换热过程.当Gr＞0时,竖直方向的温度不均匀度是影响腔体内温度均匀性的主导因素(σ竖直(≥)σ水平);而当Gr＜0时,竖直方向和水平方向上的温度不均匀度共同影响腔体内的温度均匀性(σ竖直≈σ水平).
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