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Analysis of a skewed slot orifice Item Info

The object of this study was to develop design criteria for a skewed slot orificie fishway exit. Using these criteria the fishway exist can be constructed in culvert wingwalls. The outlet would terminate in a skew angle and be designed to create flow conditions necessary for fish passage. Values of slot orifice contraction rations varied from .65 to .82 of culvert width; culvert slope varied from .015 to .045; skew angles measured varied from thirty degrees to seventy-five degrees; three lateral positions of the fishway cahnnel were tested. Dimensional analysis wwas used to determine the significant design paramenters. Design curves displaying the relationship between the backwater ration h/h and the foude number are presented. The design curves and an equation based on the momentum principle are used to design two types of skewed orifice exists. One problem uses the same contraction ratio for the skweed exit and normal slot orificies placed downstream; the other uses different values of contraction ratio for the skwed exit and normal slot orificies downstream. Necessary criteria regarding suitability of flow for fish passage are also discussed

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Title:
Analysis of a skewed slot orifice
Authors:
Harrison, Michael B.
Date Created (ISO Standard):
1972-07
Description:
The object of this study was to develop design criteria for a skewed slot orificie fishway exit. Using these criteria the fishway exist can be constructed in culvert wingwalls. The outlet would terminate in a skew angle and be designed to create flow conditions necessary for fish passage. Values of slot orifice contraction rations varied from .65 to .82 of culvert width; culvert slope varied from .015 to .045; skew angles measured varied from thirty degrees to seventy-five degrees; three lateral positions of the fishway cahnnel were tested. Dimensional analysis wwas used to determine the significant design paramenters. Design curves displaying the relationship between the backwater ration h/h and the foude number are presented. The design curves and an equation based on the momentum principle are used to design two types of skewed orifice exists. One problem uses the same contraction ratio for the skweed exit and normal slot orificies placed downstream; the other uses different values of contraction ratio for the skwed exit and normal slot orificies downstream. Necessary criteria regarding suitability of flow for fish passage are also discussed
Subjects:
fish fish migration
IWRRI number:
197208
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
Publisher:
University of Idaho
Contributing Institution:
University of Idaho
Type:
Text
Format:
application/pdf
Cataloger:
wbv
Date Digitized:
2012

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Source
Preferred Citation:
"Analysis of a skewed slot orifice", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-197208.html
Rights
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
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