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在水工设计中经常涉及到消力坎高度的计算。当下泄水流发生远趋式水跃时应设置消力坎,以消除多余的水流动能。在设计消力坎高度时有些工程师们常常会采用下泄最大流量时计算所得的消力坎高度,然而此时计算出的结果并不一定是消力坎高度的最大值,因为有可能在小于设计过流能力时需要的消力坎更高。文章从分析工程设计中消力坎的设计高度与下泄流量和淹没状态之间的关系入手,得出消力坎高度与两者之间的规律。
Hydraulics design often involves the calculation of the height of the clamshell. When the downstream discharge occurs far-type hydrodynamic jump should be set Hulakan, in order to eliminate excess water flow kinetic energy. Some engineers often adopt the calculated height of the flashlight at the maximum discharge rate when designing the height of the flashlight. However, the calculated result is not necessarily the maximum height of the flashlight, Overcurrent capacity need to be higher Hulan. Beginning with the analysis of the relationship between the design height of slug and the discharge flow and submergence status in engineering design, the article draws the conclusion that the height of clam height and the law between the two.