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Prediction of local shear stress and heat transfer between internal rotating cylinder and longitudinal cavities on stationary cylinder with various shapes

Nouri Borujerdi, A ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijthermalsci.2019.01.016
  3. Publisher: Elsevier Masson SAS , 2019
  4. Abstract:
  5. A numerical analysis has been performed to simulate flow structure, heat transfer, and pressure drop of turbulent flow in an annulus with a few longitudinal cavities on the outer stationary cylinder. The cross sections of cavities are rectangular, closed and open trapezoidal shapes. This kind of annular flow is applicable to industries applications such as electrical generators where heat generates in the cavities containing wires, heating of axial compressor rotor drams, rotating heat pipes for cooling of superconducting machines or motor rotor. The governing equations of turbulent flow are solved by using Renormalization group (RNG) k–ε model for Reynolds and Taylor numbers in the range of 5×10 3
  6. Keywords:
  7. Cavities with trapezoidal cross section ; Heat transfer ; Simulation of annular flow ; Turbulent flow ; Aspect ratio ; Axial-flow compressors ; Cylinders (shapes) ; Drops ; Heat pipes ; Pressure drop ; Reynolds number ; Rotors (windings) ; Shear stress ; Statistical mechanics ; Annular flows ; Electrical generators ; Governing equations ; Renormalization group ; Rotating cylinders ; Rotating heat pipe ; Superconducting machines ; Trapezoidal cross sections ; Heat transfer
  8. Source: International Journal of Thermal Sciences ; Volume 138 , 2019 , Pages 512-520 ; 12900729 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S1290072918305751