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为提高液压集成块的设计质量,以分布参数法建立起局部损失的数学模型,采用CFD方法模拟了局部阻碍影响下的流场分布,获得了局部阻力系数的数值量化。该模型计及局部阻碍引起的全部损失,并且消除了上、下影响长度上的沿程损失。实例计算了低雷诺数下直角转向的局部阻力系数,结果较文献数据更为可信,验证了模型的准确性及计算方法的可靠性;此外,还分析了组合转向的阻力系数随工艺孔长度及组合形式变化的规律。
In order to improve the design quality of the hydraulic manifold block, a mathematical model of local damage was established by the distributed parameter method. The CFD method was used to simulate the flow field distribution under the influence of local obstacles, and the numerical value of the local resistance coefficient was obtained. The model accounts for all the losses caused by local obstructions and eliminates the loss along the length of the upper and lower impact lengths. The local resistive coefficients of rectangular steering at low Reynolds number are calculated by the example. The result is more credible than the literature data, which verifies the accuracy of the model and the reliability of the calculation method. In addition, And the combination of changes in the law.