COMPARISON OF HYDRAULICS PARAMETER BETWEEN HALF CYCLE COSINE WEIRS AND RECTANGULAR WEIRS
Weirs are widely used in agricultural and hydraulic engineering for measuring and regulating flow. Various shapes of weirs give rise to their special characteristics. One of the...
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| Format: | Article |
| Language: | fas |
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Sharif University of Technology
2019-11-01
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| Series: | مهندسی عمران شریف |
| Subjects: | |
| Online Access: | https://sjce.journals.sharif.edu/article_20921_d8a469b1bc215389f4dde2cbebdd4c47.pdf |
| _version_ | 1797738719049940992 |
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| author | S. Salehi k. Esmaili |
| author_facet | S. Salehi k. Esmaili |
| author_sort | S. Salehi |
| collection | DOAJ |
| description | Weirs are widely used in agricultural and hydraulic engineering for measuring
and regulating flow. Various shapes of weirs give rise to their special characteristics. One of the Weirs problems in irrigation system is the change
of hydraulic characteristics when upstream of the weirs is filled by sediments.
This study introduces a novel sharp-crested weir design with a cosine weir and
investigates physical models of cosine sharp-crested weirs of different widths.
The analysis aims to establish the head discharge relationship and inspect
velocity distribution and the hydrodynamic characteristics of flow in the
vicinity of the weir plate. The hydraulic behavior of the cosine weirs is
compared with that of rectangular sharp-crested weirs. The results showed that
the turbulence intensity in the vicinity of the cosine weirs was stronger than
that in rectangular weirs. In addition, turbulence intensity, r, is sidewall
cosine weirs more than the rectangular weirs. Therefore, this type of weir
could provide the sediment transport at the upstream weirs. Result showed that
the increasing water head at the upstream with $y/P>0.78$ confection discharge
was diminished (y is the height of water on crest weir, and P is the height of
weirs from bottom to crest). In addition, with $y/P |
| first_indexed | 2024-03-12T13:47:54Z |
| format | Article |
| id | doaj.art-453fbea59cf84018ace60df1ffbc1a99 |
| institution | Directory Open Access Journal |
| issn | 2676-4768 2676-4776 |
| language | fas |
| last_indexed | 2024-03-12T13:47:54Z |
| publishDate | 2019-11-01 |
| publisher | Sharif University of Technology |
| record_format | Article |
| series | مهندسی عمران شریف |
| spelling | doaj.art-453fbea59cf84018ace60df1ffbc1a992023-08-23T08:01:26ZfasSharif University of Technologyمهندسی عمران شریف2676-47682676-47762019-11-0135.23.131210.24200/j30.2019.2092120921COMPARISON OF HYDRAULICS PARAMETER BETWEEN HALF CYCLE COSINE WEIRS AND RECTANGULAR WEIRSS. Salehi0k. Esmaili1Dept. of Civil Engineering Ferdowsi University MashhadDept. of Civil Engineering Ferdowsi University MashhadWeirs are widely used in agricultural and hydraulic engineering for measuring and regulating flow. Various shapes of weirs give rise to their special characteristics. One of the Weirs problems in irrigation system is the change of hydraulic characteristics when upstream of the weirs is filled by sediments. This study introduces a novel sharp-crested weir design with a cosine weir and investigates physical models of cosine sharp-crested weirs of different widths. The analysis aims to establish the head discharge relationship and inspect velocity distribution and the hydrodynamic characteristics of flow in the vicinity of the weir plate. The hydraulic behavior of the cosine weirs is compared with that of rectangular sharp-crested weirs. The results showed that the turbulence intensity in the vicinity of the cosine weirs was stronger than that in rectangular weirs. In addition, turbulence intensity, r, is sidewall cosine weirs more than the rectangular weirs. Therefore, this type of weir could provide the sediment transport at the upstream weirs. Result showed that the increasing water head at the upstream with $y/P>0.78$ confection discharge was diminished (y is the height of water on crest weir, and P is the height of weirs from bottom to crest). In addition, with $y/Phttps://sjce.journals.sharif.edu/article_20921_d8a469b1bc215389f4dde2cbebdd4c47.pdfcosine weirsacoustic doppler velocityconfection dischargeturbulence intensity |
| spellingShingle | S. Salehi k. Esmaili COMPARISON OF HYDRAULICS PARAMETER BETWEEN HALF CYCLE COSINE WEIRS AND RECTANGULAR WEIRS مهندسی عمران شریف cosine weirs acoustic doppler velocity confection discharge turbulence intensity |
| title | COMPARISON OF HYDRAULICS PARAMETER BETWEEN HALF CYCLE COSINE WEIRS AND RECTANGULAR WEIRS |
| title_full | COMPARISON OF HYDRAULICS PARAMETER BETWEEN HALF CYCLE COSINE WEIRS AND RECTANGULAR WEIRS |
| title_fullStr | COMPARISON OF HYDRAULICS PARAMETER BETWEEN HALF CYCLE COSINE WEIRS AND RECTANGULAR WEIRS |
| title_full_unstemmed | COMPARISON OF HYDRAULICS PARAMETER BETWEEN HALF CYCLE COSINE WEIRS AND RECTANGULAR WEIRS |
| title_short | COMPARISON OF HYDRAULICS PARAMETER BETWEEN HALF CYCLE COSINE WEIRS AND RECTANGULAR WEIRS |
| title_sort | comparison of hydraulics parameter between half cycle cosine weirs and rectangular weirs |
| topic | cosine weirs acoustic doppler velocity confection discharge turbulence intensity |
| url | https://sjce.journals.sharif.edu/article_20921_d8a469b1bc215389f4dde2cbebdd4c47.pdf |
| work_keys_str_mv | AT ssalehi comparisonofhydraulicsparameterbetweenhalfcyclecosineweirsandrectangularweirs AT kesmaili comparisonofhydraulicsparameterbetweenhalfcyclecosineweirsandrectangularweirs |