摘要
为研究车轮周围流场特征,分别对某孤立车轮静止和旋转工况下周围流场进行数值研究,并给予试验验证.计算采用定常雷诺时均纳维斯托克斯方程.在1∶15的模型风洞中进行试验.数值模拟结果与试验数据吻合.针对数值模拟结果,详细分析静止和旋转孤立车轮周围流场的流动情况、表面压力因数、气动阻力因数和气动升力因数等,得到孤立车轮旋转对车轮附近局部流场的影响以及形成机理.车轮的转动使总体压差减小,降低气动阻力和升力,改善气动性能。
To research the flow field characteristics around wheel, the flow field around an isolated wheel is numerically studied under stationary and rotating conditions and validated by test. The steady Reynolds-averaged Navier-Stokes equation is used for calculation. The test is performed in a 1 ： 15 model wind tunnel. The numerical simulation results are consistent with the test data. As to the numerical simulation results, the flow field, surface pressure factor, aerodynamic drag factor, lift factor, and so on are analyzed for stationary and rotating isolated wheel in detail. The analysis figures out the effect of rotating isolated wheel on the flow around it and its mechanism. The wheel rotation reduces the overall pressure difference, aerodynamic drag, and aerodynamic lift and improves the aerodynamic performance.
出处
《计算机辅助工程》
2012年第5期15-19,共5页
Computer Aided Engineering
基金
国家重点基础研究发展计划("九七三"计划)(2011CB711203)
关键词
孤立车轮
流场
表面压力
气动阻力
气动升力
isolated wheel
flow field
surface pressure
aerodynamic drag
aerodynamic lift
