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A 2-D oscillating flow analysis in Stirling engine heat exchangersA two dimensional oscillating flow analysis was conducted, simulating the gas flow inside Stirling heat exchangers. Both laminar and turbulent oscillating pipe flow were investigated numerically for Re(max) = 1920 (Va = 80), 10800 (Va = 272), 19300 (Va = 272), and 60800 (Va = 126). The results are compared with experimental results of previous investigators. Also, predictions of the flow regime on present oscillating flow conditions were checked by comparing velocity amplitudes and phase differences with those from laminar theory and quasi-steady profile. A high Reynolds number k-epsilon turbulence model was used for turbulent oscillating pipe flow. Finally, performance evaluation of the K-epsilon model was made to explore the applicability of quasi-steady turbulent models to unsteady oscillating flow analysis.
Document ID
19910010062
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ahn, Kyung H.
(NASA Lewis Research Center Cleveland, OH., United States)
Ibrahim, Mounir B.
(Cleveland State Univ. OH., United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1991
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
ICOMP-91-04
E-6055
NASA-TM-103781
NAS 1.15:103781
Meeting Information
Meeting: 1991 Joint ASME-JSME Fluids Engineering Conference
Location: Portland, OR
Country: United States
Start Date: June 24, 1991
End Date: June 26, 1991
Accession Number
91N19375
Funding Number(s)
CONTRACT_GRANT: NASA ORDER C-99066-G
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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