Sardasteh, A., Shafai Bejestan, M., Ayyoubzadeh, S. A., M. V. Samani, J. (2021). Hydrodynamic Performance of Triangular Winged Bandal-like Structure in a 180-degree Bend. , 23(3), 737-749.
A. Sardasteh; M. Shafai Bejestan; S. A. Ayyoubzadeh; J. M. V. Samani. "Hydrodynamic Performance of Triangular Winged Bandal-like Structure in a 180-degree Bend". , 23, 3, 2021, 737-749.
Sardasteh, A., Shafai Bejestan, M., Ayyoubzadeh, S. A., M. V. Samani, J. (2021). 'Hydrodynamic Performance of Triangular Winged Bandal-like Structure in a 180-degree Bend', , 23(3), pp. 737-749.
Sardasteh, A., Shafai Bejestan, M., Ayyoubzadeh, S. A., M. V. Samani, J. Hydrodynamic Performance of Triangular Winged Bandal-like Structure in a 180-degree Bend. , 2021; 23(3): 737-749.

Hydrodynamic Performance of Triangular Winged Bandal-like Structure in a 180-degree Bend

Journal of Agricultural Science and Technology
Article 19, Volume 23, Issue 3, 2021, Pages 737-749    PDF (1.04 M)
Document Type: Original Research
Authors
A. Sardasteh1; M. Shafai Bejestan2; S. A. Ayyoubzadeh* 3; J. M. V. Samani3
1Khuzestan Water and Power Authority Company, Ahvaz, Islamic Republic of Iran.
2Department of Water Structures, Shahid Chamran University of Ahvaz, Ahvaz, Islamic Republic of Iran.
3Department of Water Structures, Tarbiat Modares University, Tehran, Islamic Republic of Iran.
Abstract
This experiment was conducted in order to determine the hydrodynamic performance of a Triangular Winged Bandal-Like (TWBL) structure, which is a combination of the Bandal-Like (BL) structure and Triangular Vane (TV). For the purposes of this study, the JFE ALEC magnetic velocity meter was used to measure the three components of flow velocity under non-submerged hydraulic conditions at a Froude number of 0.24. The three considered cases for this measurement were the non-structured case and the BL and TWBLs. The results showed that the flow deviation occurred through the impermeable upper part of both structures towards the middle of the channel. At downstream of both structures, bubbling flows were caused by the collision of upward flows with the near-surface flow, causing disturbances in the latter. Both the BL and the TWBL structure reduced the secondary flow strength along the bend within the structure range. Compared to the BL structure, the TWBL structure reduced the secondary flow strength by about 20%, which indicates the weaker inclination of the secondary flow toward the outer bank in the TWBL structure. The relative maximum shear stress in the TWBL structure is on average 17% lower than that of the BL structure.
Keywords
Flow pattern; Karun River; Meandering river; Secondary flow strength; Shear stress
References
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