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Dimensional Analysis of Parameters Affecting the Flow Discharge Coefficient in Duckbill Spillways with Presence of Guide Vanes and Investigating Results in Laboratory Conditions

Auteur(s):



Médium: article de revue
Langue(s): en 
Publié dans: American Research Journal of Civil and Structural Engineering, , n. 1, v. 2
Page(s): 1-13
DOI: 10.21694/2577-5944.18004
Abstrait: The changes in the height of the head water in duckbill spillways in different discharges due to the increase of the crest length, is more limited. Flow discharge coefficient in duckbill spillways is a function of the total head water, spillway height, wall thickness, shape and type of the crest and angle of the side walls with flow direction. Using dimensional analysis and providing dimensional variables enables that factor affecting the behavior and duckbill spillway relations with presence of guide vanes are fully investigated. In this study, using a dimensional analysis, a relation was found between the flow discharge coefficient in the duckbill spillways with the presence of guide vanes. The results of the theory with laboratory conditions were also examined. The tested model is a triangular duckbill spillway with apex angle of 45˚. The crest of spillway has smooth edge. The width of the guide vanes was considered as a coefficient of the length of one side of the duckbill spillway with a height equal to the spillway height. According to the results, the range of the flow coefficient for the duckbill spillway is greater than the straight spillway, which shows that changing the water depth the flow discharge coefficient in the duckbill spillway is greater than the flow discharge coefficient in the straight spillway. The ratio of the length of one cycle of spillway to the water depth, the ratio of the height of the spillway to the water depth, the Froude number, the ratio of the spillway width to the waterdepth, the ratio of the guide vane width to the water depth, the number of guide vanes and the location of deployment can be influenced in the flow discharge coefficient in the duckbill spillway with flow guide vanes.
Copyright: © Seyedeh Zahra Hosseini-Teshnizi, Manouchehr Heidarpour, Seyed Saeid Eslamian, Kaveh Ostad-Ali-Askari
License:

Cette oeuvre a été publiée sous la license Creative Commons Attribution 4.0 (CC-BY 4.0). Il est autorisé de partager et adapter l'oeuvre tant que l'auteur est crédité et la license est indiquée (avec le lien ci-dessus). Vous devez aussi indiquer si des changements on été fait vis-à-vis de l'original.

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  • Reference-ID
    10333858
  • Publié(e) le:
    29.07.2019
  • Modifié(e) le:
    29.07.2019