Stable stratified flow is important for regulating the discharge at different heights in stratified reservoirs. In this article, a vertical 2-D temperature stratified flow model is applied to simulating the stratified flow from surface outlets, middle outlets and bottom outlets in a long and narrow deep reservoir. The characteristics of stratified flow pattern are obtained through the simulation. The study indicates that for stable stratified reservoirs, discharge at different elevations could form steady stratified flow in corresponding elevations, and the thickness of the stratified flow is relatively stable and is rarely affected by other layers, which lays a basis for the discharge of water layer of poor quality. The result offers a new approach to improve water quality of reservoirs and provides a scientific basis for the multi-objective comprehensive management of reservoir.
Key words
stratified reservoirs /
water quality /
discharge /
stratified flow /
numerical simulation
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1]李冰冻,李克锋,李 嘉.水库温度分层流动的三维数值模拟[J].四川大学学报(工程科学版),2007,39(1):23-27.
[2]卢金锁,李志龙.热分层对水库水质的季节性影响——以西安黑河水库为例[J].湖泊科学,2014,26(5):698-706.
[3]马 越,郭庆林,黄廷林,等.西安黑河金盆水库季节性热分层的水质响应特征[J].水利学报,2013,44(4):406-415.
[4]ANOHIN V V, IMBERGER J, ASCE M,et al. Effect of Long Internal Waves on the Quality of Water Withdrawn from a Stratified Reservoir[J]. Journal of Hydraulic Engineering, 2006, 132(11):1134-1145.
[5]SHAMMAA Y, ZHU D Z. Experimental Study on Selective Withdrawal in a Two-Layer Reservoir Using a Temperature-Control Curtain[J]. Journal of Hydraulic Engineering, 2010, 136(4):234-246.
[6]柳海涛,孙双科,王晓松,等.大型深水库分层取水水温模型试验研究[J].水力发电学报,2012,31(1):129-134.
[7]高学平,张少雄,张 晨.糯扎渡水电站多层进水口下泄水温三维数值模拟[J].水力发电学报,2012,31(1):195-201,207.
[8]冯民权,周孝德,郑邦民.糯扎渡水电站垂向二维非恒定流的数值模拟[J].水力发电学报,2003,(3):88-94.
[9]李志勤.水库水动力学特性及污染物运动研究与应用[D].成都:四川大学,2005.
[10]LIU W C, HSU M H, WU C R, et al. Modeling Salt Water Intrusion in Tanshui River Estuarine System—Case Study Contrasting Now and Then[J]. Journal of Hydraulic Engineering, 2004, 130(9): 849-859.
[11]朱伯芳. 库水温度估算[J]. 水利学报, 1985,(2):12-21.
PDF(2133 KB)
