旋风分离器分离性能的数值预测  

Numerical Prediction of Cyclone Separation Performance

作　　者：晋克勤[1] 张忠全[1] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550003

出　　处：《贵州大学学报（自然科学版）》2011年第5期41-44,共4页Journal of Guizhou University:Natural Sciences

摘　　要：对不同运行温度和压力条件下旋风分离器的分离效率和压力损失进行了数值研究。数值预测时,气相场采用雷诺应力输运模型,应用随机轨道模型来模拟湍流流场中颗粒的运动轨迹。给出了不同温度和压力条件下旋风分离器的压力损失和分离效率,并和试验数据进行了比较。分析了操作压力、温度对旋风分离器分离性能的影响。结果表明,压力损失和分离效率都随着温度的升高而降低,而且温度主要对粒径较小颗粒产生影响;操作压力增加使得压力损失和分离效率提高。从这个意义上看,温度增加而导致减小的分离效率会由于操作压力的提高而得到补偿。The gas flow fields of cyclones are simulated by using Reynolds Stress Transformation Model （RSTM）. Based on this, separation efficieneies and pressure drops of these cyclones are studied, separation performances with different temperature and pressure were presented, and the predicted separation performances were compared with the experimental data. The results indicate that pressure drops and separation efficiencies are decreased at high temperature, and the temperature has an important effect on the fine particle. On the other hand, the high pressure increases the pressure drop and separation efficiency. In point of this fact, the decrease of fractional collection efficiency caused by the high operating temperature can be remedied by the increase of operating pressure.

关 键 词：旋风分离器 高温高压 分离性能 数值预测 

分 类 号：TF066.38[冶金工程—冶金物理化学]