计算力学学报2017，Vol.34Issue(5)：570-578,9.DOI:10.7511/jslx201705006
基于浸入边界算法的振动钝体绕流模拟研究
Numerical simulation of flow around oscillating bluff body based on immersed boundary method
摘要
Abstract
In conventional CFD method ,dynamic mesh technique is always used in numerical simulation of flow past vibrating bodies ,which would inevitably create a huge task of grid regeneration .To deal with this situation ,Immersed Boundary Method (IBM ) ,which can compute the moving boundary on the stable gird ,is adopted in this paper to promote the calculation efficiency .The computation of flows around a harmonically oscillating square cylinder (Re = UD/v = 103 ,constant oscillating amplitude , varying oscillation frequency ) and a bridge section (Re=UB/v=7 .5 × 103 ,varying oscillating frequency and amplitude ) in transverse mode is carried out respectively to analyze their aerodynamic characteristics .Preliminary research results indicate that the length of lock-in region is 0 .06~0 .2 when oscillating amplitude is fixed to 14% of the square cylinder's height .The vortex shedding of oscillating square cylinder moves back to stable condition beyond Stc=0 .2 .Mean drag coefficients of the oscillating bridge section under different oscillating amplitudes all reach maxmum values near the stable vortex shedding frequencies whereas mean lift coefficients of the oscillating bridge section all come back to zero at this point .关键词
浸入边界算法/振动方柱/桥梁断面/气动特性Key words
immersed boundary algorithm/oscillating square cylinder/bridge section/aerodynamic characteristic分类
数理科学引用本文复制引用
杨青,曹曙阳,齐永胜..基于浸入边界算法的振动钝体绕流模拟研究[J].计算力学学报,2017,34(5):570-578,9.基金项目
国家自然科学基金(51478358 ) （51478358 ）
常州工学院科研基金(YN1614) （YN1614）
常州市科技计划项目(CJ-20159031)资助项目 . （CJ-20159031）
