水工导流隧洞模型试验中糙率不相似问题的研究

The Investigation of Dissimilarity of Roughness in Hydraulic Diversion Model

文中对水工导流隧洞模型试验中模型与原型糙率不相似问题 (缩尺效应 )进行了探讨。采用了模拟变态模型试验和根据雷诺数与沿程阻力系数关系 (Rem～λm) 两种方法 ,分别对溪洛渡水电站导流隧洞模型试验的过流能力进行了修正 ,从而提高了模型试验成果的精度和可靠性。两种修正方法结果比较表明 :模拟变态模型试验修正法因同时考虑了沿程和局部水头损失误差 ,其修正结果较为合理。研究成果对此类问题的处理 。

With regard to dissimilarity of roughness in the hydraulic model investigation, the discharge capacity of diversion model of Xiloudu water power station is corrected with distorted theory and the Re m～λ m relationship. And the accuracy and reliability of test results are improved. The results of the two methods demonstrate: the result from the method of distorted theory correct is more reasonable due to the considerations of the errors of linear and local head loss. This provides the effective ways to resolve the similar problems.