新型下排气旋风分离器的流场和性能数值模拟  

Numerical Simulation of the Flow Field and Performance of an Innovative Cyclone Separator with a Downward Discharge of Gases

作　　者：黄盛珠[1] 朱琳 马春元[3] 吴少华[4] 

机构地区：[1]哈尔滨工业大学(威海)热能与动力工程系,山东威海264209 [2]威海锅炉制造厂,山东威海264200 [3]山东大学能源与动力工程学院,山东济南250061 [4]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《热能动力工程》2006年第1期70-74,共5页Journal of Engineering for Thermal Energy and Power

摘　　要：利用CFD软件—Fluent中的RNG(RenormalizationGroup)k-ε和RSM(雷诺应力)湍流模型和拉格朗日模型,对一种采用两侧内外对切改进结构的新型下排气旋风分离器的气相流场和分离效率进行了模拟研究,分析其特点和性能。结果表明,该旋风分离器的气流形成顶涡环、直接进入排气管和在外侧旋转向下到达锥面后折返向上的3个支流,切向速度分布的复合涡结构不明显。模拟得出的不同出口速度时的分级效率和压力损失,其可为工程设计选型提供参考。By employing a RNG(Renormalization Group) k-ε turbulent flow model,RSM(Reynolds Stress model) turbulent flow model and a Lagrangian model in a CFD(computational fluid dynamics) software-Fluent a numerical simulation was carried out for the gas-phase flow field and separation efficiency of an innovative cyclone separator with a downward discharge of gases.The cyclone separator features an improved construction with its two sides cut at the inside and outside.An analysis of its specific features and separation performance shows that the gas flow of the cyclone separator has generated three branch flows,namely,an apex vortex ring flow,a flow characterized by a direct entry into an exhaust pipe,and a flow,which after rotating at the outer wall makes its way downward to come to a conic surface,and then turns back to flow upward.The composite vortex structure of a tangential velocity distribution appears to be not distinct.The graded efficiency and pressure losses at different outlet velocities,obtained by simulations,can be used as a practical reference during the engineering design and type selection of cyclone separators.

关 键 词：旋风分离器 流场 RNGκ-ε湍流模型 RSM湍流模型 数值模拟 

分 类 号：TB657.7[一般工业技术—制冷工程] O357.1[理学—流体力学]