The Parameterized Design of Gear Wheel and Numerical Simulation of Interior Field in Roots Blower

The parameterized rotor models of 3L series roots blower were built on the platform of Pro/E,and the area utilization coefficient was calculated easily according to the rotor cross-section.Based on these models,the numerical simulation of interior flow field of 3L33 type roots blower under the compressible and unsteady condition was received by CFD technology and Fluent software,and the distribution map of static pressure,flow field and inlet mass flow were obtained by the dynamic mesh technique,which reflected the complicated flow faithfully in the rotating process.The law of blower performance was also achieved by combining theoretical calculation with actual situation,which provided a reference for the performance prediction and reducing noise design of Roots blowers.