Unsteady numerical simulation and analysis of the flow fluctuation in the Roots blower

摘要: The pulsation in the exhaust process of three-lobe involute type Roots blower was simulated CFD method under compressible、unsteady condition. To achieve change area that dynamic mesh updating and multiple reference frame at rotor-stator coupled were adopted.The result numerical simulation contrasted with computing semi-experience theory formula.It discussed characteristic air flow fluctuation a period influence to flux.