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Effects of curvature submerge vane in efficiency of vortex settling basin | ||
| Journal of Applied Research in Water and Wastewater | ||
| مقاله 6، دوره 1، شماره 2، شهریور 2014، صفحه 80-85 اصل مقاله (1.35 M) | ||
| نوع مقاله: Research Paper | ||
| نویسندگان | ||
| Amin Hajiahmadi* 1؛ Mojtaba Saneie2؛ Mehdi Azhdari Moghadam1 | ||
| 1Department of Civil Engineering, University of Sistan and Baluchestan, Zahedan, Iran. | ||
| 2Soil Conservation and Watershed Management Research Institute (SCWMRI), Tehran, Iran. | ||
| چکیده | ||
| In this century due to population growth, the use of river water has become more complicated. Since most rivers pass across loose and erodible areas, they always act as the most important factor of transferring eroded materials from the solid crust of the earth. Vortex basins are among the solutions known for the high-speed separation of solids from liquids (filtration). One of the problems of such basins is the settling of sediments in their floor which necessitates the performance of required investigations and researches in order to present a method to exclude or reduce such sediments. The present research presents and investigates a plan to resolve this problem. This paper proceeds to perform an experimental study on the effect of a group of curvature submerged vanes in different positions at the floor of a vortex settling basin with a 90ᵒ radial section on the efficiency of the basin. The experiments were performed on a physical model with 96 cm height, 206 cm diameter, 10% floor slope, tow discharges of 45 and 37 L/S, and three orifices with 59, 46 and 36 mm diameters. Uniform aggregate (d50=0.22 mm) was applied in experiments. The efficiency of the basin was determined in six different positions of curvature submerged vanes and the values were investigated compared to each other. The results of experiments showed that the efficiency is higher when the vanes are placed more distant from the orifices while changes in orifice diameter and discharge considerably effect on the efficiency. | ||
| کلیدواژهها | ||
| Sediment؛ Settling basin؛ Submerge vane؛ Vortex flow؛ Efficiency | ||
| مراجع | ||
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Athar M., Kothyari U.C., Garde R. J., Sediment removal efficiency of vortex chamber type sediment extractor. J. hydra. Engrg., Proc., American Society of Civil Engineers (ASCE) 128 (2002) 1051-1059. Cecen K., Akmandor N., Circular Settling Basins with Horizontal Floor. MAG Report No 183, TETAK, Ankara, Turkey, 1973. Cecen K., Bayazit M., Some laboratory studies of sediment controlling structures calculation of load controlling water intake structures for Mountain Rivers. In proceedings of the Ninth Congress of the ICID, Moscow, Soviet Union, (1975) 107-110. Curi K.V., Esen I.I., Velioglu S.G., Vortex type solid liquid separator Progress in Water Technology 7 (1979) 183-190. Esen I.I., Solid liquid separation by vortex motion, Solid Liquid Flow 1 (1989) 21–27. Keshavarzi A.R., Gheisi A.R., Trap efficiency of vortex settling chamber for exclusion of fine suspended sediment particles in irrigation canals, Irrigation and Drainage 55 (2006) 419-434. Mashauri D.A., Modelling of a vortex settling basin for primary clarification of water. PhD thesis, Tampere University of Technology, Tampere, Finland, 1986. Niknia N., Keshavarzi A.R., Hosseinipour E.Z., Improvement the Trap Efficiency of Vortex Chamber for Exclusion of Suspended Sediment in Diverted Water. Proc., World Environmental and Water Resources Congress (ASCE), California, USA, (2011) 4124–4134. Odgaard A.J., Kennedy J.F., Bed -river bank protection by submerged vanes. J. Hydra. Engrg., Proc., American Society of Civil Engineers (ASCE) 109 (1983) 1161–1173. Ogihara H., Sakaguchi S., New system to separate the sediments from the water flow by using the rotating flow. Pros, 4th Congress of the Asian and Pacific Division, IAHR, Chiang Mai, Thailand, (1984) 753–766. Paul T.C., Sayal S.K., Sakhuja V.S., Dhillon G.S., Vortex-settling basin design considerations, ASCE Journal of Hydraulic Engineering 117 (1991) 172–189. Salakhov F.S., Rotational design and methods of hydraulic calculation of load-controlling water intake structures for mountain rivers, In Proceedings of Ninth Congress of the ICID, Moscow Soviet Union, (1975) 151-161. Ziaei A.N., Study on the efficiency of vortex settling basin (VSB) by physical modeling. MSc. Thesis, Shiraz University, Shiraz, Iran, 2000. | ||
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