往复流中射流的流态研究  

Flow behavior of jet in reversing flow

作　　者：马健[1,2] 

机构地区：[1]浙江大学土木工程系,浙江杭州310027 [2]台州市公路管理处,浙江台州318000

出　　处：《水利水运工程学报》2009年第1期40-46,共7页Hydro-Science and Engineering

基　　金：教育部新世纪优秀人才支持计划资助项目(批准号NCET-04-0525)

摘　　要：为研究近海水域的排污扩散规律,推导了往复流中射流流团运动轨迹与计算式.对排污工程进行概化,给出了模型的边界条件与数值模拟的工况,利用重组化群紊动能-紊动耗散率紊流模型,对往复流中射流流态进行了模拟,验证了数值模拟结果,研究了射流流速分量等值线分布,采用半经验半理论的方法分析了射流流团涡心运动规律.结果表明,受横流控制,射流z轴方向流速分量w等值线(简称:射流w等值线)在对称面上手形对称,形成两排并行的流团,流团在运动过程中互相掺混,形成Y状外形.在z剖面上射流w等值线形成一对同心圆.得到了流团涡心运动轨迹x与z分量随时间t变化的函数关系式.For study of diffusion law of drainage in shallow sea water, the jet patch movement track and formulas are gotten in reversing flow. The drainage constructions are generaliged, and the boundaries and engineering conditions of numerical simulation are put forward in this paper. Renormalization Group k-ω turbulent model is used to simulate flow behavior of jet in reversing flow, the calculation result is validated, the flow velocity component isoline distribution of jet is researched, and the semi-empirical method is adopted to analyze the movement track of jet patch vortex center. Results show that by influence of crossflow, the z axis component w contour of jet （shorten form： w contour of jet） is hand-symmetry in the symmetry surface, two rows of parallel vortexes are formed, and flow patches dash with each other and change into Y shape in the process of movement. The w contour of jet forms one pair of homocentric circles in the z sections. Functions of flow patch vortex center track x and z components changing with time t are gained.

关 键 词：往复流 射流 流态 等值线 

分 类 号：TV135.2[水利工程—水力学及河流动力学]