Numerical Investigation of Energy Dissipation in Baffled Piano Key Weirs

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Iranpour Ali; Egdernezhad Aslan; Heidar nejad Mohammad

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: JOURNAL OF NEW APPROACHES IN WATER ENGINEERING AND ENVIRONMENT Year:2024 | Volume:3 | Issue:1 Page(s): 55-70

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Title

Numerical Investigation of Energy Dissipation in Baffled Piano Key Weirs

Author(s)

Iranpour Ali | Egdernezhad Aslan | Heidar nejad Mohammad | Issue Writer Certificate

Keywords

Flow3D

energy loss

stair weirs

Weber number

Abstract

This test was done in the hydraulic laboratory of Khuzestan Water and Electricity Organization. The flume used had a rectangular cross-section with a length of 7 meters and a width of 0.6 meters. The walls of the flume were 10 mm thick and made of glass. In this experiment, 10 flow rates (from 10 to 50 liters per second) were used in free flow mode in the flume. Three piano keyboard overflows with different baffles were used. Baffles were circular, pentagonal and cubic. The overflows were made of transparent plexiglass with a thickness of 5 mm. The numerical model of Flow3D software was used to check the amount of energy consumption and compare the baffles. The highest energy loss with increasing yc/H occurred in cubic, circular and pentagonal baffles, respectively. The highest energy loss with increasing yc/H is in cubic, circular and pentagonal baffles, respectively. The energy loss in cubic, circular and pentagonal baffles was 0.65, 0.62 and 0.61, respectively. Therefore, the best result happened in the cubic baffle. By changing the height of the baffles, it was observed that the highest energy loss was measured at a height of 2 cm and the lowest value was measured at a height of 1 cm. It is recommended to use cubic baffles for more energy loss in piano key overflows. The best shape and dimensions of the baffle for this work are cubic and 2 * 2 cm.

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