矩形腔内纯水凝固过程实验研究

工程热物理学报 , 2007, 28(3): 435-438.

1.西安交通大学动力工程多相流国家重点实验室,陕西,西安,710049

2.西安交通大学动力工程多相流国家重点实验室,陕西,西安,710049

3.西安交通大学动力工程多相流国家重点实验室,陕西,西安,710049

4.西安交通大学动力工程多相流国家重点实验室,陕西,西安,710049

基金项目: 国家自然科学基金(50536040) 教育部跨世纪优秀人才培养计划(NCET-04-0923)

EXPERIMENTAL STUDY THE SOLIDIFICATION PROCESS OF WATER IN RECTANGULAR ENCLOSURE

应用PIV并结合温度变化研究纯水在矩形腔内凝固过程中的热自然对流.在侧壁和底部冷却条件下,水平温度梯度是液相区流动产生和发展的主要原因.随着冷却进行,主流区域出现新的对流涡,液相区出现流动反转现象;纯水的临界冰核尺度较大,发生过冷凝固;降低冷端温度可以强化热对流强度,提高凝固速度.

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