Numerical investigation on non-linear streaming effects in a two-stage coaxial pulse tube cryocooler

Stirling pulse tube cryocoolers (PTC) are widely used in aerospace applications for the cooling of infrared sensors and for filtering background thermal noise in the astro-imaging devices, etc. Present investigation aims to use numerical methods to demonstrate the nonlinear fluid flow, heat transfer...

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Veröffentlicht in:Physics of fluids (1994) 2024-01, Vol.36 (1)
Hauptverfasser: C, Damu, Moudghalya, Sumukh, Nerale, Mrunal M., Panda, Debashis, K S, Rajendra Prasad, Behera, Upendra, Reddy, B. N. Sathyanarantana
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container_issue 1
container_start_page
container_title Physics of fluids (1994)
container_volume 36
creator C, Damu
Moudghalya, Sumukh
Nerale, Mrunal M.
Panda, Debashis
K S, Rajendra Prasad
Behera, Upendra
Reddy, B. N. Sathyanarantana
description Stirling pulse tube cryocoolers (PTC) are widely used in aerospace applications for the cooling of infrared sensors and for filtering background thermal noise in the astro-imaging devices, etc. Present investigation aims to use numerical methods to demonstrate the nonlinear fluid flow, heat transfer, and vortex generation phenomena in a two-stage coaxial type inertance pulse tube cryocooler. The numerical simulation is conducted using commercially available Fluent® code for both single-stage and multi-stage configurations to show nonlinear processes with varying heat load conditions. It has been noticed that the width of the vortex produced inside the pulse tube grows with an increase in heat load capacity. This undesirable flow conditions yields an adverse effect in the cooling behavior and reduces overall performance of cryocooler with higher heat load. Additionally, streamlines, stream function, pressure and temperature variation plots are given for both stages with different heat load capacity to substantiate our results.
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source AIP Journals Complete; Alma/SFX Local Collection
subjects Background noise
Cryogenic cooling
Fluid flow
Infrared detectors
Infrared filters
Numerical methods
Pulse tubes
Stream functions (fluids)
Thermal noise
title Numerical investigation on non-linear streaming effects in a two-stage coaxial pulse tube cryocooler
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