FLUENT软件在圆柱绕流模拟中的应用  

Application of FLUENT software in the simulation of flow around a cylinder

作　　者：徐元利[1] 徐元春[2] 梁兴[1] 张进国[1] 

机构地区：[1]武汉大学动力与机械学院,湖北武汉430072 [2]河南油田采油一厂江河矿,河南南阳474780

出　　处：《水利电力机械》2005年第1期39-41,共3页Water Conservancy & Electric Power Machinery

摘　　要：使用计算流体力学软件FLUENT,模拟均匀来流绕固定圆柱的流动,模拟雷诺数为20,40,100时的绕流流动,得到流场的流函数等值线图和速度矢量图。计算结果表明:当雷诺数增加时,流动表现出一系列不同的构造。在雷诺数约为40前后流场有明显变化。小于这个数时,存在一对位置固定的旋涡。大于40时,流场开始变得不稳定,旋涡扩大、脱落、又生成,逐渐发展成两排周期性摆动和交错的旋涡。并与实验及数值模拟结果比较,确认FLUENT能够很好地预测流动结构。Uniform flow around a mounting cylinder is simulated with the application of FLUENT software while Reynolds number is 20,40,100. Stream function and velocity vector distributions are indicated. The results show that a series of construction appears as Reynolds number increases. When Re is around 40, flow pattern changes:there is a pair of mounting vortex with Re less than 40;on the contrary it becomes unsteady and vortex expand,slough,generate again until two rows of periodic swing and overlap vortex form. Compared with experimental results,it is confirmed that FLUENT can well predict flow structure.

关 键 词：圆柱绕流 旋涡 雷诺数 FLUENT软件 交错 流动结构 速度矢量 固定 结果比较 实验 

分 类 号：TV131.2[水利工程—水力学及河流动力学] O357[理学—流体力学]