立方体风沙粒子的低雷诺数绕流计算  

Flow Calculation Study on the Lower Reynolds Number for Cube-Shaped Blown Sand

作　　者：马亮[1] 钱光平[1] 

机构地区：[1]北京航空航天大学流体力学研究所,北京100083

出　　处：《湖南工业大学学报》2009年第1期76-78,共3页Journal of Hunan University of Technology

基　　金：国家自然科学基金重点资助项目(10532030)子课题

摘　　要：采用计算流体力学软件Fluent计算了均匀来流条件下立方体颗粒的三维绕流流场,得到了立方体颗粒在不同来流方向下的速度分布、压力分布,给出了拟合的立方体阻力系数经验公式。结果表明:绕流阻力受来流方向的影响明显,而传统的非球型颗粒阻力经验公式给出的是来流方向垂直于立方体表面时的阻力。By using CFD software Fluem, three dimensional numerical circle flow fields for cube-shaped blown sand are simulated. The flow speed and pressure distributions on different inflow condition are computed and analyzed. It is shown that the cube drag coefficient is strongly influenced by inflow angle and the traditional drag coefficient value is nearing the computed value of zero inflow angle. Finally, the cube sand drag coefficient calculation formula is fitting out and revised.

关 键 词：立方体颗粒 阻力系数 低雷诺数 

分 类 号：P425.55[天文地球—大气科学及气象学]