Numerical study on the physics of flow past submerged vane in curved channel and curved channel whit lateral intake

Subject Areas : Article frome a thesis

fatemeh avazpoor ¹ , keivan tavakoli ² , hosein montaseri ³

1 - no
2 - no
3 - teacher

Received: 2016-04-10 Accepted : 2020-01-26 Published : 2020-02-20

Keywords: flow pattern, fluent, Lateral intake, submerged vanes, U shape channel,

Abstract :

In this paper, the physics of passed flow on submerged vane that placed at the bottom of different kinds of channels is studied. Also it presente the effects of: changing angle’s vane, the distance of vane from wall and the situation of vane in front of the lateral intake on the physics passed flow on submerged vane. In this order we use the fluent software to simulation flow pattern around the submerged vane at the bottom of straight channel, U shape channel and U shape channel whit lateral intake. The results show that when the vane placed at the bottom of the straight channel with angle of 20 degree 2 vortex by same direction at both side of the vane is created. By changing the vans angle from 20 to 40 degree, one smaller vortex with opposite direction near the bottom and close the trialing edge is created. This vortex is horseshoe vortex. By using vane in U shape channel, the vortex’s direction which is created by the vane,become greater than past. This subject show that workability of the vane in U shape channel is better than in straight channel. Horseshoe vortex’s formation close the trialing edge depends on the high angle of attack. In U shape channel with lateral intake vortex is smaller because of the suction that is made by lateral intake.

References:

1)       Wang, Y.and Odgaard A.J. (1993). “Flow control with vorticity”. Journal of Hydraulic Research 31(4): 549-562

2)       Odgaard, A. J. and Wang, Y.(1991a). “Sediment management with submerged vanes, I: Theory”, J. Hydraul. Eng., 117(3), 267-28.

3)       Odgaard, A.J. and Kennedy, J. F. (1993) “River bend bank protection by submerged vanes”. Journal of Hydraulic Engineering 109(8):1161-1173.

4)       Marelius, F., and Sinha, S.K. (1998), Experimental investigations on flow past submerged vanes.Journal of Hydraulic Engineering, ASCE, 124: 5. 542-545.

5)       Odgaard, A.J. and Kennedy, J. F. (1983) “River bend bank protection by submerged vanes”. Journal of Hydraulic Engineering 109(8):1161-1173.

6)       Foroughi B.,Banirazi M,. Shafai Bajestani, (2001). “ Application of submerged vanes to organize and stabilize seasonal rivers” international conference of hydraulic structures, Iran, Kerman.(In persion)

7)       .Barkdoll, D., Ettema, R, and odgaard, A.J, )1999(. Sediment at lateral diversions: limits and enhancement to vane use. J. Hydrulic Engin., 125:8. 132-136.

8)       Jungseok, H., Julie, c., brent, m. (2010).  Movable bed scaling for bed load sediment exclusion at intake structure on rio grande. J. Hydraulic Engin, ASCE, Hy.1943., 247-250.

9)       Dehghani, A,. A. (2006) ‘Experimental study of sediment control inlet to lateral basin at 180 ° arc”. PHD thesis, civil-hydraulic engineering, Tarbiat modares university. Tehran

10)   Montaseri, H. (2008). Experimental investigation of the effect of different arrays of submerged vanes on sediment control at lateral intake in 180º bend. Ph.D. Thesis of Tarbiat Modares University.

11)   Rostam abadi, M. (2008). Numerical simulation of submerged vanes on strength of secondary flow at 180 bend whit intakes. M.sc. Thesis of tarbiat modares university.

12)   Marelius, F., and Sinha, K. (1998). Experimental investigation of flow past submerged vanes. J.Hydrulic Engin, 124:5. 542-546.

13)   Marelius, F., and Sinha, K. (2000). Analysis of flow past submerged vanes. Hydrulic, 38:1.65-71.