Abstract: Pressure-Drop correlations for Stirling-engine applications were studied from three perspectives: (1) sensitivity studies of their
effects on predicted engine performance, (2) presentation of an improved correlation for steady unidirectional flow through wire-screen matrices,
and (3) a theoretical analysis of friction factors for oscillating laminar flow through circular tubes. The sensitivity studies of two reference
engines show significant effects of regenerator pressure drop on engine performance. The improved friction factor correlations for steady unidirectional
flow fits the data satisfactorily with an uncertainty of about ±10%. The derived friction factor for oscillating flow is shown to be characterized
by two Reynolds numbers: steady and kinetic. When this friction factor is compared with the one for steady unidirectional flow, no significant difference is
observed when the kinetic Reynolds number is small, but there is a considerable increase at high kinetic Reynolds numbers.
Keywords: Stirling engine, pressure drop, oscillating flow
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Reference:
18th Intersociety Energy Conversion
Engineering Conference
August 21-26, 1983
Orlando, Florida
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