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
19920053377
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 University OH, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Fluid Mechanics And Heat Transfer
Meeting Information
Meeting: ASME and JSME Joint Fluids Engineering Conference