LUO Hu, JIN Jie, DU Gang. Numerical Simulation of Flow Fields in Circularly Lobed Ejectors With/Without Central Plug Sudden Expansion[J]. Applied Mathematics and Mechanics, 2014, 35(5): 554-564. doi: 10.3879/j.issn.1000-0887.2014.05.009
 Citation: LUO Hu, JIN Jie, DU Gang. Numerical Simulation of Flow Fields in Circularly Lobed Ejectors With/Without Central Plug Sudden Expansion[J]. Applied Mathematics and Mechanics, 2014, 35(5): 554-564.

# Numerical Simulation of Flow Fields in Circularly Lobed Ejectors With/Without Central Plug Sudden Expansion

##### doi: 10.3879/j.issn.1000-0887.2014.05.009
• Rev Recd Date: 2014-04-03
• Publish Date: 2014-05-15
• The models of lobed ejectors with/without central plug sudden expansion were built. The flow fields by CFD simulation were compared and analyzed with focuses on the sizes and distributions of the downstream streamwise vorticities. Thermal mixing efficiency and total pressure recovery coefficient were used to judge the performances of the two kinds of ejectors. The results show that the central plug with sudden expansion can effectively reduce flow loss and significantly improve the total pressure recovery coefficient. As the central plug sudden expansion causes the mainstream velocity to slow down, the vorticity of the ejector declines in the downstream flow field; but on the other hand, the central plug sudden expansion brings additional flow disturbances to the flow field and makes the mixing efficiency of the whole field increase.
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