大型循环水体置换时间的实验研究

Study about the Replaced Time of Large Circulated Water Body

论述了水体置换与置换时间特性及其影响因素,并结合工程实例,给出了基本置换时间和附加置换时间的计算思路和方法,用于大型循环水体特性研究和计算。其中水体总置换时间为基本置换时间和附加置换时间之和,它们可根据流体运动的连续性原理、水体工作平衡和流场分布进行计算。水体置换时间与水体体型尺寸、进出水口的数量、尺寸、方位、水体平衡方式和条件等诸多因素有关,应根据工程实际情况确定计算。

To keep a large circulated water excellent quality, reasonable replaced time is one of the key factors. Accordingly, based on the project example ,this paper discusses the characters and the effect factors of the water replaced time, gives numerical method and a fundamental thought of replaced time and an additional replaced time, which is used to study characters of the circulated water body. Add the fundamental of replaced time to an additional, we can get total replaced time. Based on continuous principle of fluid motion ,we can caculate water balance and veocity. Dimensions of water body, quantity of water import, way of water balance and condition etc. affect the water replaced time, we should caculate it in accordance project.