摘要
文章基于计算流体力学(CFD)数值模拟方法,以丁烯-1精制塔再沸器为研究对象,对比分析了传统防冲挡板结构与外导流筒结构的流场特性及振动响应机制。研究表明,防冲挡板结构虽能有效分散流体冲击,但在局部形成高速区,导致高湍流抖振主频率,从而诱发旋涡脱落激振及弹性失稳现象;外导流筒结构通过均匀导流降低了换热管接触面流速和湍流抖振主频率,有效减少了振动与冲击,提高了设备可靠性。可为高流速工况下再沸器防冲结构设计提供理论依据与优化策略。
This study investigates the flow field characteristics and vibration response mechanisms of traditional anti-impact baffle structures versus external guide cylinder structures in a butene-1 refining column reboiler using computational fluid dynamics(CFD)numerical simulations.The results demonstrate that while the anti-impact baffle configuration effectively disperses fluid impact,it creates localized high-velocity zones that generate elevated dominant turbulent buffeting frequencies,subsequently inducing vortex-induced excitation and elastic instability phenomena.In contrast,the external guide cylinder structure significantly reduces flow velocity at heat exchanger tube interfaces and turbulent buffeting frequency through uniform flow guidance,thereby effectively mitigating vibration and impact while enhancing equipment reliability.This research provides theoretical foundations and optimization strategies for anti-impact structure design in reboilers operating under high-flow velocity conditions.
作者
李辰宇
LI Chenyu(Nanjing YPC Refining&Chemical Co.,Ltd.,Nanjing 210048,China)
关键词
再沸器
CFD数值模拟
外导流筒
结构优化
reboiler
CFD numerical simulation
external guide cylinder
structural optimization
