摘要
针对某型旋流器,基于Navier-Stokes方程,湍流模型分别选择renormalization group(RNG)k-ε模型和Reynolds stress model(RSM)模型,采用计算流体动力学方法对旋流器内部旋流流场进行数值模拟,通过对计算结果的分析以及与试验结果的比较,进行了旋涡流动数值模拟中湍流模型的适应性研究.研究表明:由于RNGk-ε模型建立于Boussinesq涡旋黏性假设基础上,无法考虑涡旋黏性的各向异性,也无法描述湍流能量转化为平均运动能量的传递过程,因此涡旋流动模拟结果与试验结果差别较大;而RSM模型能够克服上述问题,涡旋流动模拟结果与试验结果较为接近,模拟结果能反映出旋流的基本特征.RSM模型适用于旋涡流场的数值计算.
To certain type swirl setting, the swirling flow field of swirl setting interior was simulated based on Navier-Stokes equations by using computational fluid dynamics （CFD） method with renormalization group （RNG） k-ε and Reynolds stress model （RSM） turbulence model, respectively. By analyzing the simulation results and comparing them with the experiment results, the turbulence model＇s applicability research in swirling flow numerical simulation was performed. Research shows that： the results of swirling flow sim- ulation differ a lot from the experiment results, because RNG k-s turbulence model is based on the Boussinesq eddy-viscosity hypothesis, which couldn＇t consider the anisotropy of eddy- viscosity nor describe the transport process of turbulence energy transformation to average movement energy. Thus, RSM turbulence model could conquer the problems and consist with the experiment results, and the simulation results reflect the characteristics of swirling flow. RSM turbulence model is applicable to swirling flow numerical simulation.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2011年第6期1209-1214,共6页
Journal of Aerospace Power
基金
航天科技创新基金(重点支持项目)
关键词
旋流流动
湍流模型
数值模拟
适应性研究
粒子图像测速仪测量
swirling flow
turbulence model
numerical simulation
applicability study
particle image velocimetry measurement
