Effect of tip clearance on the performance of self-priming vacuum pump

Author

Kim, J.W. ; Ji, H.G. ; Kim, Y.-J.

Author_Institution

Grad. Sch. of Mech. Eng., Sungkyunkwan Univ., Suwon, South Korea

fYear

2014

Firstpage

1

Lastpage

6

Abstract

Tip clearance between the screw rotor and rotor housing in self-priming vacuum pump is an important factor affecting the performance of the pump. In this study, the effect of asymmetrical tip clearance on the performance of self-priming pump was numerically investigated with various values of aspect ratio of lower tip clearance and upper tip clearance in rotor housing. Numerical analysis was also performed with various rotational speeds (1550, 1650, 1750, 1850 and 1950 RPM) by using commercial code, ANSYS CFX. The results for pressure distributions, velocity vector and characteristic curve were graphically depicted with different aspect ratios of lower and upper tip clearances.

Keywords

computational fluid dynamics; fasteners; finite element analysis; rotors (mechanical); vacuum pumps; ANSYS CFX; aspect ratio; asymmetrical tip clearance effect; characteristic curve; commercial code; numerical analysis; pressure distributions; rotational speeds; rotor housing; screw rotor; self-priming vacuum pump; velocity vector; Asymmetric Tip Clearance; CFD (Computational Fluid Dynamics); Self-Priming Vacuum Pump;

fLanguage

English

Publisher

iet

Conference_Titel

Fluid Machinery and Fluid Engineering, 2014 ISFMFE - 6th International Symposium on

Print_ISBN

978-1-84919-907-0

Type

conf

DOI

10.1049/cp.2014.1235

Filename

7124156