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以单边扩散角为6°的弯肘型尾水管为模型机、单边扩散角为任意值的尾水管为原型机,将各断面进行相似变换,构建出改形后的尾水管各断面形状及大小与单边扩散角的关系,并探讨了整个尾水管的总水力损失对提高整个水轮机的回能效率的影响,给出了流量、单边扩散角与回能系数、尾水管阻力损失间的关系,计算得出了改形后的尾水管。
The elbow-type draft tube whose unilateral divergence angle is 6 ° is used as the model machine, and the draft tube whose unilateral divergence angle is arbitrary is taken as the prototype machine, and the sections are similarly transformed to construct the cross-section shape of the tailrace after modification And the relationship between the size and unilateral divergence angle. The influence of the total hydraulic loss of the whole draft tube on the efficiency of the whole turbine is also discussed. The relationship between the flow rate, unilateral divergence angle and the coefficient of reentry, The relationship between the calculation of the tail pipe after the reorganization.