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Two Dimensional Oscillatory Flow Analysis in the Pulse Tubes

[+] Author Affiliations
M. H. Saidi, M. Taheri, R. Jahanbakhshi, A. Jafarian, S. K. Hannani

Sharif University of Technology, Tehran, Iran

Paper No. IMECE2008-68428, pp. 685-690; 6 pages
doi:10.1115/IMECE2008-68428
From:
  • ASME 2008 International Mechanical Engineering Congress and Exposition
  • Volume 10: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B, and C
  • Boston, Massachusetts, USA, October 31–November 6, 2008
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4871-5 | eISBN: 978-0-7918-3840-2
  • Copyright © 2008 by ASME

abstract

Recently a great attention has been given to the oscillatory flow modeling in the pulse tube cryocoolers. In this paper multi dimensioning effects of the fluid flow in the pulse tube are investigated. A complete system of governing equations is solved to report the flow field, friction coefficient and Nusselt number in the pulse tube. Harmonic approximation technique is employed to derive an analytical solution. In this respect, mass, momentum and energy balance equations as well as the equation of state for ideal gas are transformed by implementing the harmonic approximation technique. The present model is able to predict the behavior of the two dimensional compressible oscillatory flow in the tube section of the regenerative cryocoolers. Based on the proposed analytical model, friction coefficient and complex Nusselt number is reported.

Copyright © 2008 by ASME
Topics: Flow (Dynamics)

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