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A Numerical Investigation of a Miniature Pneumatic Spindle Turbine

[+] Author Affiliations
Paul Harris, Barbara Linke

University of California, Davis, Davis, CA

Stephen Spence

Queen’s University Belfast, Belfast, UK

Paper No. FPMC2016-1759, pp. V001T01A027; 8 pages
  • BATH/ASME 2016 Symposium on Fluid Power and Motion Control
  • BATH/ASME 2016 Symposium on Fluid Power and Motion Control
  • Bath, UK, September 7–9, 2016
  • Conference Sponsors: Fluid Power Systems and Technology Division
  • ISBN: 978-0-7918-5006-0
  • Copyright © 2016 by ASME


The design and numerical simulation of a radial inflow turbine for a micromachining spindle is described. The spindle design specifications require the turbine stage to produce approximately 120W of power at a nominal design speed of 100,000 rpm. The aerodynamic and structural performance of the turbine stage is assessed using Computational Fluid Dynamics (CFD) and Finite Element (FE) simulations. A number of options to reduce rotor weight and inertia while maintaining high efficiency are investigated. Finally, as machine tool spindles are typically required to operate over a wide range of torque loads and speeds, the part-load aerodynamic performance of the turbine is also assessed.

Copyright © 2016 by ASME
Topics: Turbines



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