哈尔滨工程大学学报2024，Vol.45Issue(4)：699-708,10.DOI:10.11990/jheu.202207051
刚性薄平板绕流特性的数值模拟
Numerical analysis of flow characteristics around a rigid thin plate
摘要
Abstract
To further investigate the influence of Reynolds number and inlet shear parameter on the evolution of vor-tex street in the wake and resistance characteristics of a flat plate,a model based on the immersed boundary-lattice Boltzmann method is built to numerically simulate the flow around a rigid thin plate.The Reynolds number and in-let shear parameter were considered as controls.All simulations on the flow around flat plates were performed in the range of 100≤Re≤1 200.The variation of two instability transition positions in the wake of plates and the drag ex-erted on the rigid plates with the shear parameter of the incoming flow,as well as their dependence on the Reynolds number,are extensively analyzed.The mechanisms are also discussed in detail.The results indicate that,after several quasi-periodic bifurcations,the wake flow transitions into the chaotic state with an increase in the shear pa-rameter,characterized by large-scale vortex structures.The chaotic state of the wake flow further induces low-fre-quency chaotic drag force on the plates.Moreover,a small critical shear parameter is required for the transition to chaotic flow loads with high Reynolds numbers.关键词
雷诺数/来流剪切参数/浸没边界-格子Boltzmann方法/刚性薄平板/尾流/失稳/分岔/阻力Key words
Reynolds number/inlet shear parameter/immersed boundary-lattice Boltzmann method/rigid thin plate/wake/instability/bifurcation/resistance分类
数理科学引用本文复制引用
蔚杰,武建军..刚性薄平板绕流特性的数值模拟[J].哈尔滨工程大学学报,2024,45(4):699-708,10.基金项目
国家重点研发计划(2016YFC0500901). （2016YFC0500901）
