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Investigation of Physical and Numerical Model of Archimedes Screw Turbine

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Document pages: 19 pages

Abstract: Archimedes screwturbines have been developed as they work with a low head with high efficiency,where flow energy can be exploited in small rivers, streams, regulators andothers. The power can be produced using Archimedes turbines and depends on someparameters including the number of blades, flow, and angle of the shaftinclination and the length of the pitch. A physical and numerical model has been developed to determine the performance of the Archimedes turbine onthe Ramadi Dam in Iraq. The physical model was made of stainless steel with thefollowing parameters (length 1000 mm, pitch 70 mm, diameter ratio 0.536, inclination angles 30°, 35°, 40°, 45°). Work was carriedout on different flow rates and inclination angles. The experimental resultsshowed that the highest efficiency was 81.4 at 35° inclination angleand a flow rate of 1.12 l s; the maximum power of9.03 watts was at a 45° inclination angle and a flow rate of 2.065l s and 72 efficiency. Also, the impact of the pitch and the number of bladeswere studied. The results show that torque is increase with an increase in the pitchlength, and torque is decreased with increase in several blades. The numericalresults showed that the using of two blades led to a greater power produced.The comparison of the numerical and experimental results showed a good agreement,also the comparison with the published data showed a good agreement. As a finalresult the Archimedes screw has many positive points making it a good potentialcandidate. The results that emerged show the possibility of using this type ofturbine in the Euphrates River in Anbar Governorate—Iraq, as the province ischaracterized by the presence of many regulators on the river in which turbinescan be employed.

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