直切双入口旋风分离器流场及分离效率的数值模拟

 采用RSM模型对直切式单、双进口型旋风分离器三维流场和分离效率进行数值模拟。结果表明，双进口型旋风分离器改善了单进口型式流场的不对称性，减小了流场内部的涡流，径向速度和总压也明显降低；在相同处理量下，当双进口型式的进口气速比较低时，并不能提高分离效率，只有当进口气速高于15.6 m/s后，其效率才明显高于单进口型式的旋风分离器。

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

RSM Model was employed for the simulation of three-dimensional flow field and separation efficiency of cyclone separators with single/double tangential inlets. Results showed that as compared with cyclone having single inlet, the cyclone with double inlets improved the non-symmetry of flow field, the vortex flow inside the flow field was minished, radial velocity and total pressure were reduced. At the same throughput, the advantages of cyclone with double inlets could only be exhibited when the inlet gas rate was higher than 15.6 m/s, under such condition the separation efficiency of this cyclone was significantly higher than that of the cyclone with single inlet; yet under low inlet gas rate, the improvement of separation efficiency was not significant.