||August 11, 2010 08:49
Assistance in Vacuum pump simulation
I'm using ANSYS CFX 12.1. I would like to address the challenge in vacuum pump performance especially vacuum generated. Client expects the vacuum pump to work consistently and should generate 680 mm Hg without fail. When tested in rig, certain vacuum pump models (rotary vane type) cannot meet required targets. Instead, it can generate up to 650mm Hg in the test rig. I would like to diagnose the problem using CFD analysis and find whether the flow factors if any (pressure drop/rise) are causing such mediocre performance. I'm sure that the vacuum pump can be simulated using dynamic mesh instead of MRF model as i need to capture the fluid inlet / outlet gap with vane closely. How can we model the vacuum pump when pump speed, oil flow rate, oil temperature and pressure data are known ? I would appreciate if any body could share their experiences in modeling vacuum pump.