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在进行弧形闸门出流的水力计算时,一般采用各种经验公式。我们来考察在水力布置中带有平行边墙的弧形闸门出流的平面问题解。假设液体为无粘性的、无重量的和不可压缩的,流动为定常的。以其园心位于 E 点、半径为 R 的园弧 BC 模拟闸门(见图1 a),来流流速U_∞平行于边墙。在出流边界 CD(其中 D 为无穷远点)上,压强恒等于 P_0;因此,流速在CD 上也具有常量 V_0。园弧中心高出上游顶墙的高差为 h_1,它可用 B 点的切线与横坐标轴间
During the hydraulic calculation of the outflow of arc gates, various empirical formulas are generally used. Let us examine the solution to the plane problem of the outflow of arc gates with parallel side walls in a hydraulic arrangement. The liquid is assumed to be non-tacky, weightless and incompressible and the flow is steady. With its garden center located at point E, a radius of R Park arc BC simulation gate (see Figure 1a), the flow velocity U_∞ parallel to the side wall. On the outflow boundary CD (where D is the infinity point), the pressure is constant equal to P_0; therefore, the flow rate also has a constant V_0 on the CD. Park arc center elevation above the upstream wall h_1, it can be used B point tangent and the axis of the inter-axis