Design parameters of vortex settling basin

Ansari, Mehtab Alam; Athar, Mohammad Faraz

doi:10.1680/wama.11.00098

Cited by 5 publications

(11 citation statements)

References 10 publications

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“…The dimension and other geometrical data of settling basin were fixed similar to Athar (2000), Athar et al (2002) and Ansari and Athar (2013).…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…This value of diameter is chosen on the basis of space and discharge available in the laboratory and also considering the investigations Athar (2000), Athar et al (2002) Ansari (2008) and Ansari and Athar (2013). The inlet channel used was 7.7 m long, 0.50 m deep, and 0.31 m wide and had adjustable slope and different flow conditions were used.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…The vortex settling chamber has been investigated by Cecen and Bayazit (1975), Curi et al (1975), Ogihara and Sakaguchi (1984), Sanmuganathan (1985), Mashauri (1986), Paul et al (1991), Athar (2000), Athar et al (2002), Athar et al (2005), Ansari (2008) and Ansari and Athar (2013).…”

Section: Introductionmentioning

confidence: 99%

“…Truong (2011) studied the effect of deflectors on removal efficiency of a deep-depth vortex chamber sediment extractor. Ansari and Athar (2013) studied design parameters of vortex settling basins.…”

Section: Introductionmentioning

confidence: 99%

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Performance assessment of vortex settling chambers

Ansari

Khan

2014

ISH Journal of Hydraulic Engineering

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In present investigation an attempt has been made to study the variation in sediment removal efficiency of vortex settling chamber with the locations of the inlet and outlet channels and to develop a new model for predicting the removal efficiency of the vortex settling chamber. Existing equations for removal efficiency are checked for their accuracy using experimental data collected in present study along with data available in literature. The computed efficiency by existing equations was found to be inconsistent with the corresponding observed ones. Therefore, a new equation is proposed in this study. Experiments were conducted on two geometrical models of the vortex chamber. In the first type of the extractor model, both the inlet and outlet overflow channels were kept in an alignment following a straight line tangential to the vortex chamber. In the second type of extractor model, the straight inlet channel joined the vortex chamber tangentially at its one side. The straight outlet channel was taken off tangentially from the upstream end of the chamber at 90°from the inlet channel. It was observed that the efficiency of the geometrical Model-II has been obtained higher because in this model the sediment particle may travel long helicoidal path and thus, resulting in higher settling length, smaller turbulence, and large residence time in comparison to geometrical Model-I. The proposed equation is found to produce results with a maximum error of ±35% for about 100% of the total data. The qualitative performance of the present predictor indicated that it has lowest MAPE (25.03), RMSE (0.150), and highest R 2 (0.753) as compared to other existing predictors. IntroductionRivers generally flowing in alluvial plains almost invariably transport sediment along with water. Water flowing in the canal taking off from head works on such rivers also carries sediment load with it. If the canal receives sediment load in excess of its transporting capacity and effective measures are not taken for its control, the canal gets silted up. This results in a decrease in the discharge carrying capacity of the canal. Further, the slope of the canal is generally smaller than that of the main river; hence, there is always a tendency for deposition of sediment in the canal. In the case of power canals sediment particles pass through the turbines and the sharp-edged silt/sand tends to damage the turbine runner blades due to abrasion, resulting in a decrease in the efficiency of the power plant.Different types of ejecting devices are used to control sediment in the canal. These are tunnel type ejector, vortex tube type, settling basins, and vortex settling chamber. In the present investigation vortex settling chambers are studied.Settling chambers suffer two main disadvantages i.e. requirement of large dimensions compared with other types and long residence time. Vortex settling chamber has overcome disadvantages of conventional settling chamber treating the same volume of sediment load. It is a continuous device that applies a certain fr...

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“…The dimension and other geometrical data of settling basin were fixed similar to Athar (2000), Athar et al (2002) and Ansari and Athar (2013).…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Performance assessment of vortex settling chambers

Ansari

Khan

2014

ISH Journal of Hydraulic Engineering

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show abstract

“…The efficiency of vortex settling basins in sediment removal is discussed in the fifth paper (Ansari and Athar, 2013). The authors concentrated their experimental programme on the impact of the width ratio (diameter of basin to width of inlet channel) and the diameter ratio (diameter of basin to diameter of orifice) on the efficiency of sediment removal.…”

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confidence: 99%