Effect of tailwater depth on local scour downstream of horizontal jets
In this paper the results of an experimental study on the effect of tailwater depth on the mechanism of scouring downstream of hydraulic jumps is presented. Totally, 53 tests with 12 hours run time were carried out under various tailwater depths ranging from 14.2 to 32.5 cm for 5 different densimetr...
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| Autor*in: |
Mohammad Hosain Omid [verfasserIn] Hossein Hamidifar [verfasserIn] Mohsen Nasr Abadi [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Persisch |
| Erschienen: |
2010 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
In: علوم و مهندسی آبیاری - Shahid Chamran University of Ahvaz, 2020, 33(2010), 2, Seite 63-74 |
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| Übergeordnetes Werk: |
volume:33 ; year:2010 ; number:2 ; pages:63-74 |
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Link aufrufen |
|---|
| DOI / URN: |
10.22055/jise.2010.13480 |
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| Katalog-ID: |
DOAJ042093473 |
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| 520 | |a In this paper the results of an experimental study on the effect of tailwater depth on the mechanism of scouring downstream of hydraulic jumps is presented. Totally, 53 tests with 12 hours run time were carried out under various tailwater depths ranging from 14.2 to 32.5 cm for 5 different densimetric Froude numbers. The results show that the tailwater depth has a significant role in the scouring process and its effect depends on the magnitude of densimetric Froude numbers. For high values of the Froude number, there is a critical submergence value, where the minimum depth of the scour hole is occurred. An empirical equation is proposed to determine this critical submergence factor. Considering the mechanism of a submerged jet issuing from a sluice gate opening and passing a sudden step, a new approach is proposed to justify the presence of critical submergence factor. Comparing the present results with those of previous studies shows that the length of apron is also an important factor in the scouring process. Non-dimensional graphs are presented to determine the magnitude of scour depth for different tailwater depth and Froude numbers. Finally, it was found that the maximum scour depth and the dune height are more impressible to the variations of the tailwater depth than scour hole length. | ||
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10.22055/jise.2010.13480 doi (DE-627)DOAJ042093473 (DE-599)DOAJ0a01eb793fc642398bc58c0bfda4d56e DE-627 ger DE-627 rakwb per TC1-978 TC801-978 Mohammad Hosain Omid verfasserin aut Effect of tailwater depth on local scour downstream of horizontal jets 2010 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this paper the results of an experimental study on the effect of tailwater depth on the mechanism of scouring downstream of hydraulic jumps is presented. Totally, 53 tests with 12 hours run time were carried out under various tailwater depths ranging from 14.2 to 32.5 cm for 5 different densimetric Froude numbers. The results show that the tailwater depth has a significant role in the scouring process and its effect depends on the magnitude of densimetric Froude numbers. For high values of the Froude number, there is a critical submergence value, where the minimum depth of the scour hole is occurred. An empirical equation is proposed to determine this critical submergence factor. Considering the mechanism of a submerged jet issuing from a sluice gate opening and passing a sudden step, a new approach is proposed to justify the presence of critical submergence factor. Comparing the present results with those of previous studies shows that the length of apron is also an important factor in the scouring process. Non-dimensional graphs are presented to determine the magnitude of scour depth for different tailwater depth and Froude numbers. Finally, it was found that the maximum scour depth and the dune height are more impressible to the variations of the tailwater depth than scour hole length. local scour tailwater depth hydraulic jump critical submergence factor Hydraulic engineering Irrigation engineering. Reclamation of wasteland. Drainage Hossein Hamidifar verfasserin aut Mohsen Nasr Abadi verfasserin aut In علوم و مهندسی آبیاری Shahid Chamran University of Ahvaz, 2020 33(2010), 2, Seite 63-74 (DE-627)1760638013 25885960 nnns volume:33 year:2010 number:2 pages:63-74 https://doi.org/10.22055/jise.2010.13480 kostenfrei https://doaj.org/article/0a01eb793fc642398bc58c0bfda4d56e kostenfrei http://jise.scu.ac.ir/article_13480_ada7c7f604cf1040da03cdf88b8296dc.pdf kostenfrei https://doaj.org/toc/2588-5952 Journal toc kostenfrei https://doaj.org/toc/2588-5960 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ AR 33 2010 2 63-74 |
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10.22055/jise.2010.13480 doi (DE-627)DOAJ042093473 (DE-599)DOAJ0a01eb793fc642398bc58c0bfda4d56e DE-627 ger DE-627 rakwb per TC1-978 TC801-978 Mohammad Hosain Omid verfasserin aut Effect of tailwater depth on local scour downstream of horizontal jets 2010 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this paper the results of an experimental study on the effect of tailwater depth on the mechanism of scouring downstream of hydraulic jumps is presented. Totally, 53 tests with 12 hours run time were carried out under various tailwater depths ranging from 14.2 to 32.5 cm for 5 different densimetric Froude numbers. The results show that the tailwater depth has a significant role in the scouring process and its effect depends on the magnitude of densimetric Froude numbers. For high values of the Froude number, there is a critical submergence value, where the minimum depth of the scour hole is occurred. An empirical equation is proposed to determine this critical submergence factor. Considering the mechanism of a submerged jet issuing from a sluice gate opening and passing a sudden step, a new approach is proposed to justify the presence of critical submergence factor. Comparing the present results with those of previous studies shows that the length of apron is also an important factor in the scouring process. Non-dimensional graphs are presented to determine the magnitude of scour depth for different tailwater depth and Froude numbers. Finally, it was found that the maximum scour depth and the dune height are more impressible to the variations of the tailwater depth than scour hole length. local scour tailwater depth hydraulic jump critical submergence factor Hydraulic engineering Irrigation engineering. Reclamation of wasteland. Drainage Hossein Hamidifar verfasserin aut Mohsen Nasr Abadi verfasserin aut In علوم و مهندسی آبیاری Shahid Chamran University of Ahvaz, 2020 33(2010), 2, Seite 63-74 (DE-627)1760638013 25885960 nnns volume:33 year:2010 number:2 pages:63-74 https://doi.org/10.22055/jise.2010.13480 kostenfrei https://doaj.org/article/0a01eb793fc642398bc58c0bfda4d56e kostenfrei http://jise.scu.ac.ir/article_13480_ada7c7f604cf1040da03cdf88b8296dc.pdf kostenfrei https://doaj.org/toc/2588-5952 Journal toc kostenfrei https://doaj.org/toc/2588-5960 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ AR 33 2010 2 63-74 |
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10.22055/jise.2010.13480 doi (DE-627)DOAJ042093473 (DE-599)DOAJ0a01eb793fc642398bc58c0bfda4d56e DE-627 ger DE-627 rakwb per TC1-978 TC801-978 Mohammad Hosain Omid verfasserin aut Effect of tailwater depth on local scour downstream of horizontal jets 2010 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this paper the results of an experimental study on the effect of tailwater depth on the mechanism of scouring downstream of hydraulic jumps is presented. Totally, 53 tests with 12 hours run time were carried out under various tailwater depths ranging from 14.2 to 32.5 cm for 5 different densimetric Froude numbers. The results show that the tailwater depth has a significant role in the scouring process and its effect depends on the magnitude of densimetric Froude numbers. For high values of the Froude number, there is a critical submergence value, where the minimum depth of the scour hole is occurred. An empirical equation is proposed to determine this critical submergence factor. Considering the mechanism of a submerged jet issuing from a sluice gate opening and passing a sudden step, a new approach is proposed to justify the presence of critical submergence factor. Comparing the present results with those of previous studies shows that the length of apron is also an important factor in the scouring process. Non-dimensional graphs are presented to determine the magnitude of scour depth for different tailwater depth and Froude numbers. Finally, it was found that the maximum scour depth and the dune height are more impressible to the variations of the tailwater depth than scour hole length. local scour tailwater depth hydraulic jump critical submergence factor Hydraulic engineering Irrigation engineering. Reclamation of wasteland. Drainage Hossein Hamidifar verfasserin aut Mohsen Nasr Abadi verfasserin aut In علوم و مهندسی آبیاری Shahid Chamran University of Ahvaz, 2020 33(2010), 2, Seite 63-74 (DE-627)1760638013 25885960 nnns volume:33 year:2010 number:2 pages:63-74 https://doi.org/10.22055/jise.2010.13480 kostenfrei https://doaj.org/article/0a01eb793fc642398bc58c0bfda4d56e kostenfrei http://jise.scu.ac.ir/article_13480_ada7c7f604cf1040da03cdf88b8296dc.pdf kostenfrei https://doaj.org/toc/2588-5952 Journal toc kostenfrei https://doaj.org/toc/2588-5960 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ AR 33 2010 2 63-74 |
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Effect of tailwater depth on local scour downstream of horizontal jets |
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Effect of tailwater depth on local scour downstream of horizontal jets |
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Mohammad Hosain Omid |
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علوم و مهندسی آبیاری |
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Mohammad Hosain Omid Hossein Hamidifar Mohsen Nasr Abadi |
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Elektronische Aufsätze |
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Mohammad Hosain Omid |
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10.22055/jise.2010.13480 |
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verfasserin |
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effect of tailwater depth on local scour downstream of horizontal jets |
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TC1-978 |
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Effect of tailwater depth on local scour downstream of horizontal jets |
| abstract |
In this paper the results of an experimental study on the effect of tailwater depth on the mechanism of scouring downstream of hydraulic jumps is presented. Totally, 53 tests with 12 hours run time were carried out under various tailwater depths ranging from 14.2 to 32.5 cm for 5 different densimetric Froude numbers. The results show that the tailwater depth has a significant role in the scouring process and its effect depends on the magnitude of densimetric Froude numbers. For high values of the Froude number, there is a critical submergence value, where the minimum depth of the scour hole is occurred. An empirical equation is proposed to determine this critical submergence factor. Considering the mechanism of a submerged jet issuing from a sluice gate opening and passing a sudden step, a new approach is proposed to justify the presence of critical submergence factor. Comparing the present results with those of previous studies shows that the length of apron is also an important factor in the scouring process. Non-dimensional graphs are presented to determine the magnitude of scour depth for different tailwater depth and Froude numbers. Finally, it was found that the maximum scour depth and the dune height are more impressible to the variations of the tailwater depth than scour hole length. |
| abstractGer |
In this paper the results of an experimental study on the effect of tailwater depth on the mechanism of scouring downstream of hydraulic jumps is presented. Totally, 53 tests with 12 hours run time were carried out under various tailwater depths ranging from 14.2 to 32.5 cm for 5 different densimetric Froude numbers. The results show that the tailwater depth has a significant role in the scouring process and its effect depends on the magnitude of densimetric Froude numbers. For high values of the Froude number, there is a critical submergence value, where the minimum depth of the scour hole is occurred. An empirical equation is proposed to determine this critical submergence factor. Considering the mechanism of a submerged jet issuing from a sluice gate opening and passing a sudden step, a new approach is proposed to justify the presence of critical submergence factor. Comparing the present results with those of previous studies shows that the length of apron is also an important factor in the scouring process. Non-dimensional graphs are presented to determine the magnitude of scour depth for different tailwater depth and Froude numbers. Finally, it was found that the maximum scour depth and the dune height are more impressible to the variations of the tailwater depth than scour hole length. |
| abstract_unstemmed |
In this paper the results of an experimental study on the effect of tailwater depth on the mechanism of scouring downstream of hydraulic jumps is presented. Totally, 53 tests with 12 hours run time were carried out under various tailwater depths ranging from 14.2 to 32.5 cm for 5 different densimetric Froude numbers. The results show that the tailwater depth has a significant role in the scouring process and its effect depends on the magnitude of densimetric Froude numbers. For high values of the Froude number, there is a critical submergence value, where the minimum depth of the scour hole is occurred. An empirical equation is proposed to determine this critical submergence factor. Considering the mechanism of a submerged jet issuing from a sluice gate opening and passing a sudden step, a new approach is proposed to justify the presence of critical submergence factor. Comparing the present results with those of previous studies shows that the length of apron is also an important factor in the scouring process. Non-dimensional graphs are presented to determine the magnitude of scour depth for different tailwater depth and Froude numbers. Finally, it was found that the maximum scour depth and the dune height are more impressible to the variations of the tailwater depth than scour hole length. |
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Effect of tailwater depth on local scour downstream of horizontal jets |
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https://doi.org/10.22055/jise.2010.13480 https://doaj.org/article/0a01eb793fc642398bc58c0bfda4d56e http://jise.scu.ac.ir/article_13480_ada7c7f604cf1040da03cdf88b8296dc.pdf https://doaj.org/toc/2588-5952 https://doaj.org/toc/2588-5960 |
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Hossein Hamidifar Mohsen Nasr Abadi |
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