摘要
以对旋风机为模型,使用Fluent软件对模型风机内部流场进行数值模拟.控制方程基于求解三维雷诺平均守恒型定常Navier-Stokes(N-S)方程,选用Realizablek-ε湍流模型,近壁区域采用标准壁面函数,给出了求解的网格、边界条件,特别分析了两级叶轮间界面上数据传递的处理方法,利用该数值模拟方法分析在不同转速比的变工况下内流特征,为两级叶轮的匹配提供了数值实验依据.设计工况下性能CFD预测结果和实验气动性能结果相符合,表明所用的数值模拟方法进行性能预测有较高的精度和可靠性,同时为内部流动优化提供依据,是同类风机性能优化的一种有效方法.
The inner flow field of a counter-rotating axial fan mode was numerically simulated by using Fluent. In the numerical calculations, 3d Reynolds average steady Navier-Stocks equations, Realizable k-ε turbulent model and standard wall function within near wall zone were used. Introduced the solving process, the simulation mesh, the boundary condition and treatment method of the plane between two stages. The characteristic of the inner flow field in design or off-design conditions is showed, and the performance of the fan is predicted. The computed result shows that the performance prediction by numerical method has good precision and reliability, and it is available for optimizing the performance and others.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第9期81-84,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
华中科技大学重点基础研究基金资助项目(2003)
关键词
对旋风机
变工况
数值模拟
counter-rotating fan
design or off-design conditions
numerical simulation
