Study of flow over piano key weir of different plan shapes with free and partially submerged outlet conditions

Piano key weirs are being increasingly used for better flood passage downstream, both as a new structure or on top of hydraulic structures like a dam, to increase their discharging capacity as well as reservoir storage. Much research has been done on rectangular plan-form, while other plan-forms war...

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Autores principales:	Amiya Abhash, K. K. Pandey, Ravi P. Tripathi
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	discharge capacity experimental study numerical study outlet submergence piano key weir Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
Acceso en línea:	https://doaj.org/article/e78fe6658cda472e9727a540a40ad085
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spelling	oai:doaj.org-article:e78fe6658cda472e9727a540a40ad0852021-11-06T10:08:47ZStudy of flow over piano key weir of different plan shapes with free and partially submerged outlet conditions1606-97491607-079810.2166/ws.2021.086https://doaj.org/article/e78fe6658cda472e9727a540a40ad0852021-09-01T00:00:00Zhttp://ws.iwaponline.com/content/21/6/3141https://doaj.org/toc/1606-9749https://doaj.org/toc/1607-0798Piano key weirs are being increasingly used for better flood passage downstream, both as a new structure or on top of hydraulic structures like a dam, to increase their discharging capacity as well as reservoir storage. Much research has been done on rectangular plan-form, while other plan-forms warrant attention. The present study focuses on two different plan geometries of PKW, i.e., rectangular (RPKW) and trapezoidal with angle α equal to 9 degrees (TPKW9) for their head-discharge relation in a wide channel of 0.984 m width under free-flow condition. Since the role of CFD is increasingly becoming prominent in present times, a numerical study using ANSYS-FLUENT was also carried out to ascertain its relevance in predicting flows around complex structures like PKW. Further, the tailgate was closed to render the PKW's outlet from partial to fully submerged conditions. The effect of these submerged outlets was studied for any changes in the discharging capacity of the PKW. The study shows RPKW to be more hydraulically efficient than TPKW9 for the model geometry. Further, the study finds that under partial to full submergence of PKW outlets, both PKW units' discharging capability remains unchanged. HIGHLIGHTS The present study focuses on the head-discharge relationship of RPKW and TPKW9 in a channel of 0.984 m width.; The study shows rectangular PKW to be more hydraulically efficient than TPKW9 for the same upstream-downstream crest length.; The numerical study using ANSYS-FLUENT supported the findings of experimental study.; Partial to full submergence of PKW outlets has negligible effect on its discharging capacity.;Amiya AbhashK. K. PandeyRavi P. TripathiIWA Publishingarticledischarge capacityexperimental studynumerical studyoutlet submergencepiano key weirWater supply for domestic and industrial purposesTD201-500River, lake, and water-supply engineering (General)TC401-506ENWater Supply, Vol 21, Iss 6, Pp 3141-3152 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	discharge capacity experimental study numerical study outlet submergence piano key weir Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
spellingShingle	discharge capacity experimental study numerical study outlet submergence piano key weir Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506 Amiya Abhash K. K. Pandey Ravi P. Tripathi Study of flow over piano key weir of different plan shapes with free and partially submerged outlet conditions
description	Piano key weirs are being increasingly used for better flood passage downstream, both as a new structure or on top of hydraulic structures like a dam, to increase their discharging capacity as well as reservoir storage. Much research has been done on rectangular plan-form, while other plan-forms warrant attention. The present study focuses on two different plan geometries of PKW, i.e., rectangular (RPKW) and trapezoidal with angle α equal to 9 degrees (TPKW9) for their head-discharge relation in a wide channel of 0.984 m width under free-flow condition. Since the role of CFD is increasingly becoming prominent in present times, a numerical study using ANSYS-FLUENT was also carried out to ascertain its relevance in predicting flows around complex structures like PKW. Further, the tailgate was closed to render the PKW's outlet from partial to fully submerged conditions. The effect of these submerged outlets was studied for any changes in the discharging capacity of the PKW. The study shows RPKW to be more hydraulically efficient than TPKW9 for the model geometry. Further, the study finds that under partial to full submergence of PKW outlets, both PKW units' discharging capability remains unchanged. HIGHLIGHTS The present study focuses on the head-discharge relationship of RPKW and TPKW9 in a channel of 0.984 m width.; The study shows rectangular PKW to be more hydraulically efficient than TPKW9 for the same upstream-downstream crest length.; The numerical study using ANSYS-FLUENT supported the findings of experimental study.; Partial to full submergence of PKW outlets has negligible effect on its discharging capacity.;
format	article
author	Amiya Abhash K. K. Pandey Ravi P. Tripathi
author_facet	Amiya Abhash K. K. Pandey Ravi P. Tripathi
author_sort	Amiya Abhash
title	Study of flow over piano key weir of different plan shapes with free and partially submerged outlet conditions
title_short	Study of flow over piano key weir of different plan shapes with free and partially submerged outlet conditions
title_full	Study of flow over piano key weir of different plan shapes with free and partially submerged outlet conditions
title_fullStr	Study of flow over piano key weir of different plan shapes with free and partially submerged outlet conditions
title_full_unstemmed	Study of flow over piano key weir of different plan shapes with free and partially submerged outlet conditions
title_sort	study of flow over piano key weir of different plan shapes with free and partially submerged outlet conditions
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/e78fe6658cda472e9727a540a40ad085
work_keys_str_mv	AT amiyaabhash studyofflowoverpianokeyweirofdifferentplanshapeswithfreeandpartiallysubmergedoutletconditions AT kkpandey studyofflowoverpianokeyweirofdifferentplanshapeswithfreeandpartiallysubmergedoutletconditions AT raviptripathi studyofflowoverpianokeyweirofdifferentplanshapeswithfreeandpartiallysubmergedoutletconditions
_version_	1718443827842252800

Study of flow over piano key weir of different plan shapes with free and partially submerged outlet conditions

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