摘要
为研究不同柱型绕流的水动力特性,以三维圆柱和方柱为例,运用有限元仿真软件ANSYS Workbench,模拟仿真在雷诺数为2.0×104下中截面近壁面周向压力、平均阻力系数、平均升力系数以及斯特劳哈儿数等,并通过分析展向不同截面的旋涡脱落和尾流验证其三维特性,结果表明,圆柱绕流过程中,分离点是不变的,只是围绕一点作周期运动,方柱绕流过程中分离点不断变化在左右前角点之间周期变化;相同条件下,方柱的旋涡脱落频率比圆柱的旋涡脱落频率低,而尾流幅度比圆柱大;整个绕流过程有明显的三维特性,验证了分析三维模型的必要性。
In order to study the hydrodynamic characteristics of different column type flows, the finite element simulation software ANSYS workbench is used to simulate the circumferential pressure, the average resistance Coefficient, the average lift coefficient and the number of Strawa of the middle section in the Reynolds number of 2.0×104 , then through the analysis of the different cross section of the vortex shed ding and wake to verity its three dimensional characteristics. It is showed that around the cylinder flow process, the separation point is constant, but the square cylinder is changing. In the same condition, the vortex shedding frequency of the square column is lower than that of the cylinder, but the wake amplitude is larger than that of the cylinder. The whole process has obvious three dimensional characteristics, which proves the necessity of analyzing the three dimensional model.
作者
崔宜梁
王海峰
李蒙
孙凯利
CUI Yi liang;WANG Hai {eng;LI Meng;SUN Kai li(Qingdao Institute of Stardardization,Qingdao 266101,China;School of Electromechanic Engineering,Qingdao University,Qingdao 266071,China)
出处
《青岛大学学报（自然科学版）》
CAS
2018年第3期63-68,共6页
Journal of Qingdao University(Natural Science Edition)
基金
山东省高等学校科技计划项目(批准号:J12LN95)资助
山东省科技发展计划(政策引导类项目)(批准号:2012YD04038)资助
国家自然科学基金(批准号:51405255)资助
关键词
水动力特性
旋涡脱落
周期运动
尾流
Hydrodynamic characteristics
vortex shedding
periodic motion
wake flow
