水库深孔挑射出流对复氧的试验研究  

Experimental studies on aeration performance of hydraulic tunnel excavation

作　　者：范丽丽[1] 沙海飞[2] 吴时强[2] 周辉[2] 陈惠玲[2] 

机构地区：[1]河海大学环境学院,江苏南京210098 [2]南京水利科学研究院,江苏南京210029

出　　处：《水科学进展》2006年第2期176-180,共5页Advances in Water Science

摘　　要：在水工泄水建筑物复氧能力的研究中,前人对自由溢流复氧能力和闸下出流复氧能力的研究较多,但对泄流水库下层水的中孔和深孔的复氧能力研究较少。为了消除低溶解氧的水库下层水对下游生态环境的不利影响,保证水生生物的多样性,在滩坑水电站泄洪洞模型中进行了系统的试验,发现复氧率与弗汝德数和下游相对水深相关性较好,同时增设掺气槽能够显著的提高复氧率。经研究提出的在一定条件下的经验公式,为水工深孔设计提供了参考。In the previous aeration researches on the sluice structure, there are many achievements about the free-surface aeration and the sluice aeration, but there are fewer hydraulic tunnel excavation aeration researches. In order to reduce the disadvantageous impact on the ecological environment, a set of aeration performances were conducted for the hydraulic tunnel excavation. It is found from the experiments that the oxygen transfer efficiency at the hydraulic tunnel excavation is related to Fr and ht/h. It also reveals that the oxygen-transferable efficiency of the hydraulic tunnel excavation increases with the aerator. It is expected that the results from this study will serve for the improvement of the design of the hydraulic tunnel excavation with high aeration efficiency.

关 键 词：水库 复氧 试验研究 生态环境 

分 类 号：X143[环境科学与工程—环境科学]