摘要
通过室内渗透系数物理试验和数值模拟,对后寨典型岩溶小流域的岩溶化程度高低不同的两岩块试样达西流向非达西流流态转化展开研究。运用CFP(管道流程序)准确捕捉到岩块试样达西流向非达西流流态转化的临界雷诺数、临界水力梯度、临界流速等参数阈值;采用Shoemaker模型与Forchheimer模型对非达西流态进行分析研究,结果发现,Shoemaker模型与Forchheimer模型的标准化残差均方根Normalized RMS分别为0.16和0.28,表明Shoemaker模型方法拟合效果要好于Forchheimer模型方法;在雷诺数计算分析中,Forchheimer模型方法中采用的特征直径比Shoemaker模型方法采用的平均空隙直径更加合理。
In order to studying ransition from the Darcian flow to non-Darcian flow of rock samples in different kartification degree of the Houzhaikarstic water system, the critical hydrodynamic thresholds of these two rock samples, such as critical Reynolds number, critical hydraulic gradient, and critical groundwater velocity, have been determined exactly by using the CFP(Conduit Flow Process)through the labortary experiment and the numierical simulation. The non-Darcy flow condition was also analyzed by Shoemaker model and Forchheimer model. The results are as follows. On the one hand, the NormalizedRMS of the Shoemaker model and the Forchheimer model is 0.16 and 0.28. It shows that the former has better fitting effect that the latter. On the other hand, the characteristic diameter used in the Shoemaker model is more reasonable than the average void diameter used in the Shoemaker model.
作者
刘丽红
吴潇潇
颜冰
Liu Lihong;Wu Xiaoxiao;Yan Bing(College of Earth and Environment,Anhui University of Science and Technology,Huainan Anhui 232001,China)
出处
《科技通报》
北大核心
2017年第1期32-38,共7页
Bulletin of Science and Technology
基金
国家自然科学基金资助项目41201017
大学生创新创业训练计划项目
