【作者】 姜波； 田茂诚； 冷学礼； 唐玉峰； 程林；

【Author】 JIANG Bo,TIAN Mao-cheng,LENG Xue-li,TANG Yu-feng,CHENG Lin (School of Energy Source and Power Engineering,Shandong University,Jinan 250061,China,

【机构】 山东大学能源与动力工程学院；

【摘要】 为研究流体诱导弹性管束的振动、流动及传热特性,采用ADINA数值方法对其进行模态分析,得到了管束的前九阶振型图,结果发现弹性管束的振型较为复杂,既存在管束所在平面的面内振动,又存在垂直于管束平面的面外振动。同时,文中采用该方法对脉动流作用下弹性管束的振动及其近壁流场进行流固耦合模拟研究,得到了管束在水流冲刷作用下的变形及其周围流场的速度矢量图。结果表明:在文中脉动参数的作用下,弹性管束在筒体空间内做复杂的三维振动,面外振动的位移大小明显高于面内振动。其中,中间两弹性管的振幅较大,对其周围流体的扰动强烈,可以得出该区域内的换热效果较好,这与传热实验的结果基本吻合。更多还原

【Abstract】 To study the vibration,flow and heat transfer characteristics of flow-induced elastic tube bundle,ADINA numerical method was adopted to perform modal analysis on the bundle.Charts of the first to ninth order mode shape were obtained.And it is found that the mode shape of elastic tube bundle is comparatively complicated,with vibration both parallel and vertical to the bundle plane. Meanwhile,fluid-structure interaction simulation was performed with this method on elastic tube bundle and near-wall fluid under the pulsating flow,and charts of bundle deformation under the effect of flow and velocity vector of flow field surrounding the bundle were obtained.The results show that under the pulsating parameters in the paper,elastic tube bundles present complex tri-dimensional vibration in shell space,with displacement of vibration vertical to bundle plane significantly larger than that of in-plane;Among which the middle two elastic tubes have the larger amplitude and thus the intense disturbance on surrounding fluid,showing better heat transfer effect in this region,which basically fitted the results of heat transfer experiments.更多还原