分层型水库中不同高程孔口泄流是否能形成稳定的库内分层流对于水库水质分层泄流调控具有重要意义。针对狭长窄深分层型水库,采用垂向二维水温分层流模型对不同高程孔口泄流条件下的库内分层流进行了模拟,获得了表孔、中孔及底孔泄流所形成的分层流型态特性。初步研究表明:对于稳定分层型水库,各高程孔口泄流基本能在对应孔口吸出厚度层形成较稳定的水温分层流,且吸出厚度在空间分布上相对稳定,受其他水层影响相对较小。该结果为有针对地通过不同高程孔口泄放水库中的劣质水层创造了条件,有望为实现水库水质改善探索新的途径,并为水库多目标综合调度提供科学决策依据。
Abstract
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.
关键词
分层水库 /
水质 /
泄流 /
分层流 /
数值模拟
Key words
stratified reservoirs /
water quality /
discharge /
stratified flow /
numerical simulation
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[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 Effect of Long Internal Waves on the Quality of Water Withdrawn from a Stratified Reservoir[J].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.
基金
国家自然科学基金面上项目(51479010);中央级公益性科研院所基本科研业务费项目(CKSF2015050/SL)
PDF(2133 KB)
