摘要
针对旋风分离器内强旋流动的数值模拟,改进了雷诺应力方程压力应变项的IPCM+wall模型,加入到FLUENT6.0软件平台上。分别用修正的和标准的IPCM+wall模型、IPCM模型以及SSG模型,对蜗壳式旋风分离器内三维湍流流动进行了数值模拟,给出了分离空间和灰斗内的时平均速度和雷诺应力分量的分布,并用LDV测量结果加以检验。研究结果表明,修正的IPCM+wall模型对切向和轴向速度、切向和轴向正应力以及轴-切剪应力的预报值与实测值的吻合比其他压力应变项模型的好得多。
The Isotropization of Production and Convection plus wall reflection pressure-strain model （IPCM plus wall model） in the Reynolds stress equation is modified for simulating strongly swirling turbulent flows in cyclone separators and is incorporated into the platform of FLUENT 6.0. The three-dimensional turbulent flows in a volute cyclone separator are simulated using modified and standard Isotropization of Production and Convection plus wall reflection models, the Isotropization of Production and Convection models （IPCM models） as well as the Quadratic Pressure-Strain Model （SSG model）. Predictions of the time-averaged velocities and Reynolds stresses in the separation space and dust hopper are verified by LDV experimental results. The results indicate that tangential and axial velocities, normal Reynolds stress components, as well as shear stresses predicted using the modified IPCM plus wall model are much better than those obtained using other pressure-strain models.
出处
《工程力学》
EI
CSCD
北大核心
2005年第5期83-88,共6页
Engineering Mechanics
基金
国家重点基础研究专项经费资助项目子课题G-1999-0222-07
石油大学资助的清华大学和石油大学合作项目
关键词
旋风分离器
强旋湍流
数值模拟
压力应变项模型
雷诺应力
cyclone separator
strongly swirling turbulent flows
numerical simulation
pressure-strain model
Reynolds stresses
