减阻剂溶液的传递机理  

Transfer Mechanism of Drag-reducing Agent Solution

作　　者：苏为科[1] 李彬睿 刘红[1] 蔡戈冬 王高生[1] 钱刚 

机构地区：[1]浙江工业大学,浙江大学,浙江省化工研究所

出　　处：《浙江工学院学报》1994年第2期93-98,共6页

摘　　要：本文通过对前人所提出“的各种减阻机理假说进行分析后，从湍流机理和结构着手，把传统的Ｄａｎｃｋｗｅｒｔｓ［１－２］传质表面更新理论和湍流随机理论［３］结合起来，探讨减阻剂分子对湍流流动的作用机理。根据本文假说──表面随机更新假说，可以成功地解释纯溶剂中加入减阻剂后所产生的各种现象：对层流流动不起减阻作用；对于湍流流动，三传系数均减小，但减小的百分率不同；传统类比式已不再适用于减阻流动；不同的减阻剂作用效果不同。After analysing previous assumptions of drag reduction mechanism, this paper discusses the mechanism of drag reduction which is based on theories of conyentional surface renewal and random model. According to the model, many phenomina which are caused by adding drag-reducing agent to solution can be explained successfully, such as no effect on laminar flow,redttcing coefficiencies of momentttm, mass and heat transfer but different among them in reducing level in turbulent flow, the conyentional transfer analogy equations no ayailable to drag-reducing agent solution and different to drag-reducing agent solution and different drag-reducing effects caused by different kinds of drag-reducing agent.

关 键 词：湍流 减阻剂 动量传递 热量传递 

分 类 号：TQ314.2[化学工程—高聚物工业]