Journal
JOURNAL OF FLUIDS AND STRUCTURES
Volume 40, Issue -, Pages 42-51Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jfluidstructs.2013.03.012
Keywords
Aerostatic bearing; Large eddy simulation; Vortex shedding; Pressure fluctuation; Vibration
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Funding
- National Basic Research and Development Program of China [2009CB724205]
- National Natural Science Foundation of China [51121002, 51175196]
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In aerostatic bearings, high speed air flow may induce small vibration, which has been harmful to the improvement of moving and positioning accuracy of aerostatically supported devices in ultra-precision applications. In this paper, the transient flow field in the aerostatic bearing is numerically investigated using the large eddy simulation method. Turbulent structures are studied and vortex shedding phenomenon is discovered in the bearing recess. Our computational results demonstrate that vortex shedding causes pressure fluctuation in the bearing clearance. Relationship between pressure fluctuation and bearing vibration is established based on our simulation results and experimentally measured vibration strength. (C) 2013 Elsevier Ltd. All rights reserved.
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