In this paper, the governing process of gates is firstly analysed, and then the mathematical models of the operation of upstream constant level gate and that of downstream one are given.
本文首先分析了闸门的调节过程，然后给出了上游常水位闸门和下游常水位闸门工作的数学模型。
A gate valve and a rotary butterfly valve are shown acting as the upstream throttling valve.
图中显示一闸阀及一旋转的蝶阀用作上游节流阀。
Based on available research results the author probes into the numerical modeling of velocity field of upstream and downstream flow of project with asymmetric plan layout of gate and plant.
在现有研究成果的基础上，对闸站平面不对称布置枢纽上下游水流流场的数值模拟方法进行了探讨。
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