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在明渠水流的流态判别中,临界水深是一个很重要的水深,它表示了断面水流所处的状态和特征.梯形断面临界水深的计算,一般借助于图表或者试算和图解,求解显得很繁杂.梯形断面临界水深的求解能否用公式表达,并用计算器方便地计算?笔者通过研究,导出了临界水深e~(-x)函数形式的表达公式,并进行了大量的计算和验证,证明利用一般的函数计算器计算,都能达到计算速度快,成果准确等优点.
In the flow regime of open channel flow, critical depth is a very important water depth, which indicates the state and characteristics of the section flow. The calculation of the critical depth of the trapezoidal section is usually based on charts or trial calculations and diagrams, Complicated. The critical depth of the trapezoidal cross-section can be expressed using the formula, and calculated easily with a calculator? The author through the study, derived the expression of critical depth e ~ (-x) function form, and a lot of calculations and verification, Prove the use of general function calculator, can achieve the calculation speed, the results are accurate and so on.