斜切双进口旋风分离器流场及分离效率的数值模拟  

NUMERICAL SIMULATION OF FLOW FIELD AND SEPARATION EFFICIENCY OF CYCLONE SEPARATOR WITH OBLIQUE TANGENTIAL DOUBLE INLETS

作　　者：吴彩金[1] 马正飞[2] 

机构地区：[1]淮阴工学院生化院,淮安223003 [2]南京工业大学化学化工学院

出　　处：《石油炼制与化工》2011年第12期50-55,共6页Petroleum Processing and Petrochemicals

摘　　要：提出一种斜切双进口旋风分离器,并用RSM模型对该分离器的三维流场和分离效率进行数值模拟。结果表明:斜切双进口型式旋风分离器很好地改善了单进口直切式旋风分离器流场的不对称性,减小了内部的局部涡流;随着倾斜角度的增加,其切向速度、轴向速度均呈现先增加后降低的趋势,在倾斜角度为12°时轴向速度达到最大值,倾斜角度为10°时切向速度达到最大值,压降也呈现先增加后降低的规律,但最大值也远远小于单进口型式,径向速度变化不明显;斜切式双进口旋风分离器可以有效提高旋风分离器的分离效率,其最佳倾斜角度为10°。A new type of cyclone with oblique tangential double inlets was proposed,and RSM Mod- el was employed to simulate the three dimensional flow field and separation efficiency of said cyclone separator. Results showed that cyclone with oblique tangential double inlets improved the flow field non- symmetry of single entry cyclone greatly and the partial vortex flow inside the flow field was min ished. With the increase of obliquity, both tangential and axial velocities exhibited the trends of firstly in- creased and then decreased, the maximum axial velocity and maximum tangential velocity was obtained at a obliquity of 12 degree and 10 degree,respectively. Same trend was observed with pressure drop,but the maximum value was far below that of single entry cyclone, the change of radial velocity was not significant. Cyclone with oblique tangential double inlets could improve the separation efficiency significantly, and the optimal obliquity angle was 10 degree.

关 键 词：旋风分离器 进口角度 流场 分离效率 

分 类 号：TQ051.8[化学工程]