【作者】 刘咏； 钱家忠； 赵卫东；

【Author】 Liu Yong Qian Jia-zhong Zhao Wei-dong (School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, School of Resources and Environmental Engineering,Hefei University of Technology, Hefei 230009)

【机构】 合肥工业大学生物与食品工程学院； 合肥工业大学资源与环境工程学院；

【摘要】 根据室内模拟实验,研究了窄缝条件下(0．1-1．5mm)裂隙水流的雷诺数随裂隙开启度、裂隙水平均流速以及裂隙壁面粗糙度不同而变化的规律,探讨了作为裂隙水流流态判别标准的雷诺数的临界值问题,得出以下结论:a.窄缝裂隙水流的雷诺数随流速及裂隙开启度增大而增大,而且随裂隙开启度增大,雷诺数对平均流速的梯度也增大:b．不同实验条件下窄缝基岩单裂隙水流雷诺数值在102．29-600．44之间,远低于粗糙单裂隙中地下水流临界雷诺数值(2300),且除600．44外,其余均低于光滑单裂隙中地下水流临界雷诺数值(600)。上述结论为基岩裂隙水Non-Darcy流动研究提供了新的实验证据。更多还原

【Abstract】 Reynolds number is an important parameter to study groundwater flow in fractured media. By means of simulated tests in laboratory, the Reynolds number of bedrock water and the relationships between average velocity and hydraulic gradient have been studied in a single fine fracture (0.1-1.5mm aperture) under different conditions. Then the motion types have been discussed.The conclusions have been drawn: (a) the Reynolds number of flow in a single fine fracture is in proportion to the average velocity and the fracture aperture, and the gradient of the Reynolds numbers versus the average velocity increase with the apertures increasing; (b) Under the different conditions, the values of Reynolds number in a single fine fractures are in the range of 102.29-600.44. These values are far from the critical Re (2300) for coarse-wall fractures, and except one value 600.44, others are less than the critical Re (600) for smooth-wall fractures in former studies. New test proofs have been provided for the study on non-Darcy flow in the fractures.更多还原