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固体物料管道水力输送的试验研究和实际应用中,管道阻力损失规律一直是人们研究的重点,因为它涉及到动力设备的规模和运行安全。但这种管道阻力损失的变化规律,至今还没有一个符合实际的理论公式。虽然经验公式很多,但只适用于某一特定的条件。目前,被人们广泛采用的计算两相流管道阻力损失公式是杜朗德(Durand)方程式,因为它是由相似力学原理推导出来又得到了大量实测资料的验证。它的基本形式是
In the experimental research and practical application of hydraulic conveying of solid material pipelines, the law of loss of pipe resistance has been the focus of research because it involves the scale and operational safety of power equipment. However, the change rule of the pipeline resistance loss has not yet reached a realistic theoretical formula. Although many empirical formula, but only for a particular condition. At present, Durand equation is widely used to calculate the resistance loss of a two-phase flow pipe because it is derived from the principle of similarity mechanics and has been verified by a large number of measured data. Its basic form is