摘要
利用有限元方法离散控制方程,结合动网格技术,建立了三维流固耦合振动的数值模型,对管壳式换热器内串列、并列、交错排列的双弹性管受横向流诱发的涡激振动进行了数值模拟,着重研究了不同节径比排列下的双弹性管中与圆筒轴线重合的中心管振动特性。结果表明:双根管间距的增大,对中心管的运动振幅起到了抑制作用;双根管串列且中心管直面来流方向时,中心管的振动较为显著,振动轨迹接近"一"字形;双根管并列时,随着间距的增大,中心管的振动幅度逐渐减小;双根管交错排列时,中心管的振动轨迹均为椭圆形。
Having the finite element method used to discretize the governing equations and the dynamic mesh technique combined to establish numerical model of three-dimensional fluid-structure interaction vibration was implemented,including simulation of vortex-induced vibration caused by transverse flow in tandem,parallel and staggered biaxial tubes in the shell and tube heat exchanger,the studies on vibration characteristics of the central tube with the cylinder axis coincident with different section ratios. The results show that,the increasingof double-tube spacing can restrain motion amplitude of the center tube; when the double root canals are in serial and the center tube is in the direction of flow,the central tube vibrates significantly and the vibration locus closes to the ＂one＂shape; when the double root canals are in paralle,and with the spacing increases,the central tube vibration amplitude gradually reduces; the double root canals are in staggered arrangement and the center tube vibration trajectory is elliptical.
作者
刘德
刘巨保
岳欠杯
丁宇奇
魏永和
LIU De;LIU Ju-bao;YUE Qian-bei;DING Yu-qi;WEI Yong-he(College of Mechanical Science and Engineering,Northeast Petroleum University;Management Training Center,State Grid Jibei Electric Power Company Limited)
出处
《化工机械》
CAS
2018年第4期495-500,514,共7页
Chemical Engineering & Machinery
基金
中国石油科技创新基金项目(2017D-5007-0610)
黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT-2017036)
黑龙江青年重点培育基金项目(2017PYQZL)
关键词
管壳式换热器
双弹性管
流固耦合
横向流
涡激振动
shell and tube heat exchanger
double elastic tubes
fluid-solid coupling
lateral flow
vortexinduced vibration
