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Stilling basin erosion due to vertical crossing jets / Pagliara, Stefano in Journal of hydraulic research, Vol. 50 N° 3 (Mai/Juin 2012) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 50 N° 3 (Mai/Juin 2012) . - pp. 290-297 Titre : Stilling basin erosion due to vertical crossing jets Type de document : texte imprimé Auteurs : Pagliara, Stefano, Auteur ; Michele Palermo, Auteur ; Dipankar Roy, Auteur Année de publication : 2012 Article en page(s) : pp. 290-297 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Plunge  pool  Scour  Spillway  Tailwater  Vertical  crossing  jet Résumé : The scour process due to plunging jets has received considerable attention in the past few decades. This work analyses the effect of vertical jets crossing at various angles. Different scour morphologies created under various hydraulic and geometrical conditions are distinguished. The splash shapes are also analysed and a qualitative description is furnished. The scour phenomenon is analysed, resulting in relationships that can be used to predict the main geometrical scour parameters, including the maximum scour hole depth, the scour hole length, and the scour hole width. The scour hole and dune profiles are compared with those due to a single jet under identical hydraulic conditions, whose vertical inclination with respect to the horizontal plane equals the average vertical angle between the two crossing jets. It was found that for high tailwater condition, the scour hole depth due to crossing jets is less than that for the single jet. ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/full/10.1080/00221686.2012.669534 [article] Stilling basin erosion due to vertical crossing jets [texte imprimé] / Pagliara, Stefano, Auteur ; Michele Palermo, Auteur ; Dipankar Roy, Auteur . - 2012 . - pp. 290-297. Hydraulique Langues : Anglais (eng) in Journal of hydraulic research > Vol. 50 N° 3 (Mai/Juin 2012) . - pp. 290-297 Mots-clés : Plunge  pool  Scour  Spillway  Tailwater  Vertical  crossing  jet Résumé : The scour process due to plunging jets has received considerable attention in the past few decades. This work analyses the effect of vertical jets crossing at various angles. Different scour morphologies created under various hydraulic and geometrical conditions are distinguished. The splash shapes are also analysed and a qualitative description is furnished. The scour phenomenon is analysed, resulting in relationships that can be used to predict the main geometrical scour parameters, including the maximum scour hole depth, the scour hole length, and the scour hole width. The scour hole and dune profiles are compared with those due to a single jet under identical hydraulic conditions, whose vertical inclination with respect to the horizontal plane equals the average vertical angle between the two crossing jets. It was found that for high tailwater condition, the scour hole depth due to crossing jets is less than that for the single jet. ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/full/10.1080/00221686.2012.669534