大坝下游河床潜流带温度场的影响因素研究
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摘要
基于雷诺平均方程(N-S方程)、k-ω湍流模型,并利用CFD-Fluent及COMSOL Multiphysics软件,构建地下水-地表水耦合模型;通过Morris全局灵敏度分析方法探讨单因素影响及多因素影响下河床潜流带内温度场变化规律。结果表明:河床潜流带的温度场对流速v和水深H较为灵敏,其余依次为沙坡高度h和河床底质渗透系数k;河道水位与河床潜流带的温度场变化呈正相关;多因素共同作用对河床潜流带温度场影响明显,且在沙坡下会出现一个半圆的低温区域。通过对大坝下游河床潜流带的温度场进行影响因素敏感性分析,可对水库下游河流生态治理和修复有一定指导意义。
Based on the Reynolds average equation(N-S equation) and k-ω turbulence model and CFD-fluent and COMSOL Multiphysics software, this paper constructed the groundwater surface water coupling model. Through Morris global sensitivity analysis, this paper discusses the variation law of temperature field in hyporheic zone affected by single factor and multiple factors. The results show that the temperature field of hyporheic zone is sensitive to flow velocity v and water depth H, and the rest are, in turn, the height H of sand slope and the permeability coefficient k of river bed bottom. The water level of river channel is positively correlated with the temperature field of hyporheic zone. The temperature field of hyporheic zone is affected by many factors, and a semicircular low temperature area will appear under the sand slope. Influence factors sensitivity analysis on that temperature field of hyporheic zone of the dam downstream could provide valuable information for the ecological treatment and restoration of the rivers downstream.
Based on the Reynolds average equation(N-S equation) and k-ω turbulence model and CFD-fluent and COMSOL Multiphysics software, this paper constructed the groundwater surface water coupling model. Through Morris global sensitivity analysis, this paper discusses the variation law of temperature field in hyporheic zone affected by single factor and multiple factors. The results show that the temperature field of hyporheic zone is sensitive to flow velocity v and water depth H, and the rest are, in turn, the height H of sand slope and the permeability coefficient k of river bed bottom. The water level of river channel is positively correlated with the temperature field of hyporheic zone. The temperature field of hyporheic zone is affected by many factors, and a semicircular low temperature area will appear under the sand slope. Influence factors sensitivity analysis on that temperature field of hyporheic zone of the dam downstream could provide valuable information for the ecological treatment and restoration of the rivers downstream.
引文
[1] 杜尧,马腾,邓娅敏,等.潜流带水文-生物地球化学:原理、方法及其生态意义[J].地球科学,2017,42(5):661-673.
[2] Norman F A, Cardenas M B. Heat transport in hyporheic zones due to bedforms: an experimental study[J]. Water Resources Research, 2014,50(4):3568-3582.
[3] 陈孝兵,赵坚,李英玉,等.床面形态驱动下潜流交换试验[J].水科学进展,2014,25(6):34-41.
[4] 刘东升,赵坚,吕辉.大坝下游河岸带冬夏季水热交换特征对比[J].水科学进展,2017,28(1):124-132.
[5] 陈斌,吕辉.渗流仪装置结构对潜流交换的影响研究[J].水利与建筑工程学报,2018,16(2):232-236.
[6] 李英玉,赵坚,吕辉.河岸带潜流层温度示踪流速计算方法[J].水科学进展,2016,27(3):423-429.
[7] Mamer E A, Lowry C S. Locating and quantifying spatially distributed groundwater/surface water interactions using temperature signals with paired fiber-optic cables[J]. Water Resources Research, 2013,49(11):7670-7680.
[8] Sawyer A H, Cardenas M B, Buttles J. Hyporheic temperature dynamics and heat exchange near channel-spanning logs[J]. Water Resources Research, 2012,48,W01529.
[9] Patel V C, Yoon J Y. Application of turbulence models to separated flow over rough surfaces[J]. Journal of Fluids Engineering, 1995,117(2):234-241.
[10] Yoon J Y, Patel V C. Numerical model of turbulent flow over sand dune[J]. Journal of Hydraulic Engineering, 1996,122(1):10-18.
[11] Chen X B, Cardenas M B, Chen Li. Three-dimensional versus two-dimensional bed form-induced hyporheic exchange[J]. Water Resources Research, 2014,51(4):2923-2936.
[12] Janssen F, Cardenas M B, Sawyer A H, et al. A comparative experimental and multiphysics computational fluid dynamics study of coupled surface-subsurface flow in bed forms[J]. Water Resources Research, 2012,48(8):W08514.
[13] 仵彦卿.多孔介质渗流与污染物迁移数学模型[M].北京:科学出版社,2011.
[14] 杨勇,赵坚,陈孝兵,等.河道低温水对地表水-地下水交错带温度的影响[J].长江科学院院报,2011,29(1):20-24.
[15] 吴志伟,宋汉周.基于全局灵敏度分析的大坝温度场影响因子探讨[J].水利学报,2011,42(6):737-742.DOI:10.3969/j.issn.1672-1144.2019.01.045第17卷第1期
2019年2月水利与建筑工程学报Journal of Water Resources and Architectural EngineeringVol.17 No.1Feb.,2019
[2] Norman F A, Cardenas M B. Heat transport in hyporheic zones due to bedforms: an experimental study[J]. Water Resources Research, 2014,50(4):3568-3582.
[3] 陈孝兵,赵坚,李英玉,等.床面形态驱动下潜流交换试验[J].水科学进展,2014,25(6):34-41.
[4] 刘东升,赵坚,吕辉.大坝下游河岸带冬夏季水热交换特征对比[J].水科学进展,2017,28(1):124-132.
[5] 陈斌,吕辉.渗流仪装置结构对潜流交换的影响研究[J].水利与建筑工程学报,2018,16(2):232-236.
[6] 李英玉,赵坚,吕辉.河岸带潜流层温度示踪流速计算方法[J].水科学进展,2016,27(3):423-429.
[7] Mamer E A, Lowry C S. Locating and quantifying spatially distributed groundwater/surface water interactions using temperature signals with paired fiber-optic cables[J]. Water Resources Research, 2013,49(11):7670-7680.
[8] Sawyer A H, Cardenas M B, Buttles J. Hyporheic temperature dynamics and heat exchange near channel-spanning logs[J]. Water Resources Research, 2012,48,W01529.
[9] Patel V C, Yoon J Y. Application of turbulence models to separated flow over rough surfaces[J]. Journal of Fluids Engineering, 1995,117(2):234-241.
[10] Yoon J Y, Patel V C. Numerical model of turbulent flow over sand dune[J]. Journal of Hydraulic Engineering, 1996,122(1):10-18.
[11] Chen X B, Cardenas M B, Chen Li. Three-dimensional versus two-dimensional bed form-induced hyporheic exchange[J]. Water Resources Research, 2014,51(4):2923-2936.
[12] Janssen F, Cardenas M B, Sawyer A H, et al. A comparative experimental and multiphysics computational fluid dynamics study of coupled surface-subsurface flow in bed forms[J]. Water Resources Research, 2012,48(8):W08514.
[13] 仵彦卿.多孔介质渗流与污染物迁移数学模型[M].北京:科学出版社,2011.
[14] 杨勇,赵坚,陈孝兵,等.河道低温水对地表水-地下水交错带温度的影响[J].长江科学院院报,2011,29(1):20-24.
[15] 吴志伟,宋汉周.基于全局灵敏度分析的大坝温度场影响因子探讨[J].水利学报,2011,42(6):737-742.DOI:10.3969/j.issn.1672-1144.2019.01.045第17卷第1期
2019年2月水利与建筑工程学报Journal of Water Resources and Architectural EngineeringVol.17 No.1Feb.,2019