Experimental investigation of tailwater effect on the energy dissipation through screens

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2007

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Aslankara, Vedat

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Previous studies have shown that screens may be utilized efficiently for dissipating the energy of water. For the present study, a series of experimental works are executed to investigate the tailwater and multiple screen effects on the energy dissipation through screens. Water flowing beneath a sliding gate is used to simulate the flow downstream of a hydraulic structure. In the present study, one double screen and two double screen arrangements with porosity of 40% and inclination angle of 90 degree is used. A tailwater gate structure is used to adjust the tailwater depth. The major parameters for the present study are upstream flow depth, tailwater gate height, location of the screen together with the supercritical upstream flow Froude number for a range covering from 5.0 to 22.5. The gate opening simulating a hydraulic structure is adjusted at heights of 2 cm and 3 cm during the study. The results of the experiments show that the tailwater depth has no significant additional contribution on the energy dissipation, whereas multiple screen arrangement dissipates more energy as compared to one double screen arrangement.

Subject Keywords

Dams, Barrages.

URI

http://etd.lib.metu.edu.tr/upload/12608693/index.pdf
https://hdl.handle.net/11511/16975

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

V. Aslankara, “Experimental investigation of tailwater effect on the energy dissipation through screens,” M.S. - Master of Science, Middle East Technical University, 2007.