Title

Submergence effects on discharge coefficients for rectangular orifices

Document Type

Conference Paper

Peer Reviewed

1

Publication Date

1-1-2004

Journal/Book/Conference Title

Joint Conference on Water Resource Engineering and Water Resources Planning and Management 2000, July 30, 2000 - August 2

Conference Location

Minneapolis, MN, United states

Abstract

Numerous studies have been performed to determine the discharge coefficient for orifices. These studies have included a variety of shapes, sizes, and configurations. The values developed typically ranges from about 0.6 to 0.85. However, specific discharge coefficient values for a particular configuration often appear contradictory. This is probably a result of variations in testing methods and operating conditions. The effect of submergence is also not specifically identified as a parameter for determining the discharge coefficient. Therefore, it is difficult to confidently select a discharge coefficient value from the available literature for an orifice operating under different levels of submergence. For this reason, a physical model was constructed at the Iowa Institute of Hydraulic Research to determine the effect of submergence on a rectangular orifice with partially suppressed contractions. The model results demonstrated that the discharge coefficient varies from about 0.6 to 0.85 depending on the magnitude of the submergence. Copyright ASCE 2004.

Keywords

Sustainability, Water resources, Hydraulics, Orifices, Planning, Water resources exploration

Published Article/Book Citation

Joint Conference on Water Resource Engineering and Water Resources Planning and Management 2000, July 30, 2000 - August 2, Minneapolis, MN, United states, 2004.

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URL

http://ir.uiowa.edu/iihr_pubs/18