城市大型缓流景观水体流场模拟及人工循环水动力优化  

Flow field simulation and hydrodynamic optimization of urban large slow-moving water body

作　　者：贾泽宇[1,2] 郑剑锋[1,2] 孙力平[1,2] 于静洁[1,2] 

机构地区：[1]天津城建大学环境与市政工程学院,天津300384 [2]天津市水质科学与技术重点实验室,天津300384

出　　处：《环境工程学报》2015年第9期4159-4164,共6页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07308-002)

摘　　要：人工水力措施是改善城市景观水体水质的重要方式,但由于其建造运行费用高,因此有必要进行优化研究。采用计算流体力学的方法对生态城景观水体几种情景下的流场分布进行了模拟,并通过定量的方法评价得出最优的水动力运行方案,为水体运行规划提供决策支持。研究表明,在补水总流量一定的情况下,采用单点补水与多点补水时水体流动性均较差,但多点补水时补水均匀性有所改善,宜与其他方法联用;4种循环流量的模拟结果表明,循环流量为15万t/d时即可推动水体达到期望流速,继续增加循环流量效果不明显。Anthropogenic hydraulic measures were often applied to improve the water quality of urban scenic water body,but for the high construction and operation cost,it needed to proceed optimization. The hydrodynamic conditions of some scenarios of the eco-city scenic water were simulated using the CFD method. The effectiveness of management plan was evaluated with quantitative methods to support decision making. The results show that under certain total flow discharge,both one-point and multi-point filling have less effect to promote the fluidity,but the latter can improve the uniformity,and it might be better to combine with other methods. The150 000 t/d circulation flow rate will push the water body reach the expected velocity,and there is no obvious effect with the growing flow discharge.

关 键 词：景观水体 流场模拟 人工循环 水动力优化 

分 类 号：X321[环境科学与工程—环境工程]