孔口出流公式作为解水击连锁方程边界条件的局限性

Limitation of Orifice Flow Formula Used as Boundary Condition for Solving Interlock Equation of Water Hammer

论述了恒定孔口出流公式近似用作末端断面针阀控制的简单管道水击连锁方程的边界条件的局限性，指出由此可能导致与实际情况不相符合的计算结果的原因所在，并提出了避免发生上述错误的计算方法。

This paper discusses the limitation of the steady orifice flow formula used approximately as the boundary condition in solving the interlocking equations of water hammer in a simple pipe, in which its end section is controlled by the needle valve, and points out that the limitation may introduce an errous calculation result inconsistent with practice, and proposes a calculation method for avoiding the above mentioned error.