紊动水体复氧规律研究  

Study on reaeration laws of turbulent water body

作　　者：李然[1] 李嘉[1] 赵文谦[1] 李克锋[1] 

机构地区：[1]四川大学高速水力学国家重点实验室,成都610065

出　　处：《环境科学学报》2000年第6期723-726,共4页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金!重点资助项目 (596392 4 0 )

摘　　要：根据紊动扩散理论及气液界面质量传递过程 ,在对流场精确描述和对表面传质系数充分研究的基础上 ,建立了三维紊动水体复氧模型 .模型充分考虑了流场及紊动特性对复氧影响 .Based on theories of turbulent diffusion and liquid\|gas interfacial mass transfer a conceptual model of reaeration process in turbulent water body is developed. A new point of view that the oxygen fluxes caused by molecular diffusion and turbulent diffusion should be counted separately is proposed. Based on turbulence\|generated reaeration experiments the relationship between interfacial mass transfer coefficient and interfacial kinetic energy is established. A 3\|D reaeration model, in which the effect of turbulence on reaeration is fully considered and the hydrodynamic characteristics is accurately described, is developed. The study is of great importance to the disclosure of reaeration laws and the distribution of the dissolved oxygen concentration in turbulent body.

关 键 词：紊动 表面传质系数 溶解氧 水质评价 水体复氧 

分 类 号：X824[环境科学与工程—环境工程] TV131.21[水利工程—水力学及河流动力学]