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Numerical analysis on thermoacoustic prime movers for development of pulse tube cryocoolers

Behera, U and Kasthurirengan, S and Skaria, Mathew and Shafi, KA and Kamble, BV and Kuzhiveli, Biju T (2012) Numerical analysis on thermoacoustic prime movers for development of pulse tube cryocoolers. In: Advances in Cryogenic Engineering: Transactions of the Cryogenic Engineering Conference - CEC, 13–17 June 2011, Spokane, Washington, USA, pp. 451-458.

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Official URL: http://dx.doi.org/10.1063/1.4706951

Abstract

Thermo Acoustic Prime Movers (TAPMs) are being considered as the ideal choice for driving the Pulse Tube Cryocoolers replacing the conventional compressors. The advantages are the absence of moving components and they can be driven by low grade energy as such as fuel, gas, solar energy, waste heat etc. While the development of such TAPMs is in progress in our laboratory, their design and fabrication should be guided by numerical modeling and this may be done by several methods such as solving the energy equation 1], enthalpy flow model 2], CFD 3], etc. We have used CFD technique, since it provides a better insight into the velocity and temperature profiles. The analysis is carried out by varying parameters such as (a) temperature difference across the stack, (b) stack and resonator lengths and (c) different working fluids such as air, nitrogen, argon etc. The theoretical results are compared with the experimental data wherever possible and they are in reasonably good agreement with each other. The analysis indicate that (i) larger temperature difference across the stack leads to increased acoustic amplitude, (ii) longer resonator leads to decrease in frequency with lesser amplitude and (iii) there exists an optimal stack length for the best performance of TAPM. These results are presented here.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to American Institute of Physics.
Keywords: Thermoacoustics; Stack; Resonator; Cryocoolers; CFD
Department/Centre: Division of Physical & Mathematical Sciences > Centre for Cryogenic Technology
Depositing User: Id for Latest eprints
Date Deposited: 04 Mar 2013 08:29
Last Modified: 04 Mar 2013 08:29
URI: http://eprints.iisc.ac.in/id/eprint/45407

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