| Titre : | Energy dissipation and flow characteristics of baffles and sills on stepped spillways (2012) |
| Auteurs : | Hesham K. Zare, Auteur ; John C. Doering, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Journal of hydraulic research (Vol. 50 N° 2, Mars/Avril 2012) |
| Article en page(s) : | pp. 192-199 |
| Note générale : | Hydraulique |
| Langues : | Anglais |
| Tags : | Baffle-stepped spillway Cavity End-sill Energy dissipation Flow characteristics Rounded-stepped Sharp-stepped Skimming flow |
| Résumé : | In this study, a two-dimensional physical model was used to evaluate the effectiveness of adding baffles and sills at step edges or of shifting them from step edges of a 1V:1H sloping, short, sharp- or round-crested stepped spillway with an ogee inlet. A comparison between different configurations of baffles and sills was carried out with respect to the energy dissipation and the flow characteristics. The baffle-shifted round-crested spillway gives the smallest discharge required for the onset of a skimming flow among all other configurations. The baffle-edged chute dissipates more energy than the sill-edged spillway. Shifting baffles or sills from the sharp edges decreases the energy dissipation. Shifting baffles or sills from the round-crested spillway increases the energy dissipation in the range of the discharges studied. Empirical equations for energy dissipation are introduced for practical application of spillways of comparable similar conditions. |
| DEWEY : | 627 |
| ISSN : | 0022-1686 |
| En ligne : | http://www.tandfonline.com/doi/abs/10.1080/00221686.2012.659840 |
