本文已被：浏览 1453次 下载 437次
投稿时间：2018-03-06
投稿时间：2018-03-06
中文摘要: 采用层流模型和RNG k-ε紊流模型，对亚临界雷诺数条件（Re=300~300 000）下，流体横掠圆柱体工况进行了数值模拟，得出了此工况下扰流流态转捩的规律。与经典试验数据进行对比验证，结果表明，阻力系数Cd和斯特劳哈数St分别可在来流雷诺数小于22 000和100 000时采用层流模型计算，误差分别小于16.4%和7.3%。
Abstract:Laminar flow model and RNG k-epsilon turbulent model are used to simulate the working conditions of the cross swept cylinder under subcritical Reynolds number.The law of fluid flow transition under this condition is obtained.Then by comparson with the classical experimental data,the following conclusions are drawn:the resistance coefficient Cd and Strouhal number St can be calculated by laminar flow model when the flow Reynolds number is smaller than 22 000 and 100 000 respectively,and their errors are less than 16.4% and 7.3%,respectively.
keywords: cylinder critical Reynolds number fluid cross numerical simulation resistance coefficient Strouhal number
文章编号：20184009 中图分类号： 文献标志码：
基金项目:
引用文本：
李永光,樊鹏远,白曾凯,等.流体横掠圆柱数值模拟流态转换临界雷诺数的研究[J].上海电力大学学报,2018,34(4):347-350,370.
LI Yongguang,FAN Pengyuan,BAI Zengkai,et al.Study on the Flow Regime Transformation Critical Reynolds Number in Numerical Simulation of Fluid Across a Cylinder[J].Journal of Shanghai University of Electric Power,2018,34(4):347-350,370.
李永光,樊鹏远,白曾凯,等.流体横掠圆柱数值模拟流态转换临界雷诺数的研究[J].上海电力大学学报,2018,34(4):347-350,370.
LI Yongguang,FAN Pengyuan,BAI Zengkai,et al.Study on the Flow Regime Transformation Critical Reynolds Number in Numerical Simulation of Fluid Across a Cylinder[J].Journal of Shanghai University of Electric Power,2018,34(4):347-350,370.