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Influence of Temperature Distribution on Tighten Force in Tie-Bolt Fastened Rotor With Considering Thermal Contact Conductance

[+] Author Affiliations
He Peng, Ning Xu, Zhansheng Liu

Harbin Institute of Technology, Harbin, China

Paper No. GT2015-44031, pp. V05CT18A005; 10 pages
doi:10.1115/GT2015-44031
From:
  • ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
  • Volume 5C: Heat Transfer
  • Montreal, Quebec, Canada, June 15–19, 2015
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5673-4
  • Copyright © 2015 by ASME

abstract

Tighten force has much influence on tie-bolt fastened rotor dynamics. Temperature distribution in tie-bolt fastened rotor results in thermal expansion of rotor and rods. The difference of thermal expansion between rotor and rods causes the variation of bolt load. With considering the thermal contact conductance, the thermal model of tie-bolt fastened rotor was established by finite element method and the axial temperature distribution was obtained. The influences of surface roughness, nominal contact pressure and axial position of contact on axial temperature distribution were analysed. Based on temperature distribution in the tie-bolt fastened rotor, the variation of tighten force was investigated. Results show that nominal contact pressure, surface roughness and axial contact arrange have different influences on the variation of tighten force with temperature.

Copyright © 2015 by ASME

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