NDLI: Measurements in oscillatory flows with separation in support of Stirling engine model development

Content Provider	IEEE Xplore Digital Library
Author	Adolfson, D.A. Simon, T.W. Ibrahim, M.B. Gedeon, D.
Copyright Year	2002
Description	Author affiliation: Dept. of Mech. Eng., Minnesota Univ., Minneapolis, MN, USA (Adolfson, D.A.; Simon, T.W.)
Abstract	This work is a contribution to a larger program that seeks to improve computation of unsteady flows in Stirling engines. It presents flow visualization results from an experiment that replicates important features of oscillatory flows; such as large-scale separation and adverse and favorable, spatial and temporal acceleration. The geometry is a tube perpendicular to a space between two circular discs, one of which the tube penetrates such that the end of the tube is flush with the disc inner surface. The flow, driven by a piston in the tube, is oscillatory and acts on the exhaust stroke as a jet impinging on the center of a circular disc and on the intake stroke as a sink flow drawn into a tube from the space between the two discs. Time-varying recirculation zones and periodic appearances of highly turbulent flow are observed. In addition to a characterization of oscillatory, separating flow, this program provides code validation support for Stirling engine design models. The project goals are to identify the areas where 1-D modeling is especially weak and to provide support for developing more sophisticated design models that can be used with greater confidence. A complete description of the experiment and results is given. It is shown that a change in geometry can affect the flow in major way; i.e. whether a recirculation eddy survives an entire cycle or is eliminated upon flow reversal. Future work is outlined.
Starting Page	543
Ending Page	548
File Size	644457
Page Count	6
File Format	PDF
ISBN	0780372964
DOI	10.1109/IECEC.2002.1392101
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-07-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stirling engines Computational fluid dynamics Space heating Heat engines Mechanical engineering Visualization Large-scale systems Geometry Pistons Frequency
Content Type	Text
Resource Type	Article

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