Hydrodynamics characterization of perforated plate flow passages
- Univ. of California, Los Angeles, CA (United States)
Plates and screens are components in regenerator stacks whose thermal performance depends on the hydrodynamics of the flow. The present studies supplement transient runs of preceding screen work. Perforated plates with hole diameters on the order of 300 micrometer have been characterized hydrodynamically using gas flow and liquid nitrogen near atmospheric pressure. The data obtained are compared to dimensionless equations based on the Reynolds number containing the {open_quotes}Darcy length{close_quotes} (square root of permeability). The Reynolds number range extends from intermediate to turbulent flow rates (order of magnitude 1 to 100). The flow behavior observed qualitatively is in first order agreement with linear superposition equations, e.g. Reynolds-Forchheimer-Ergun equation. Quantitatively the effective permeability ratio is used which requires a turbulent friction factor which departs from the value 1.75 of the Ergun equation.
- DOE Contract Number:
- FG05-90ER80865
- OSTI ID:
- 47821
- Report Number(s):
- CONF-930703--
- Country of Publication:
- United States
- Language:
- English
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