@article{article_498046, title={Effects of the Blades Orientation on a Cross-Flow Water Turbine Performance}, journal={The Eurasia Proceedings of Science Technology Engineering and Mathematics}, pages={203–211}, year={2018}, author={Benzerdjeb, Abdelouahab and Abed, Bouabdellah and Achache, Habib and Hamıdou, Mohammed K. and Gorlov, Alaxender M.}, keywords={Renewable energy,Cross-flow turbine,Orientation angle,Rivers,Power}, abstract={<p> <span style="font-size: 10pt; line-height: 115%; font-family: "Times New Roman", serif; border: none;">Efficiency <b> </b>and power improvement of cross-flow turbines harnessing rivers and ocean water energy is a key issue. Therefore, in this </span> <span lang="EN" style="font-size:10.0pt; line-height:115%;font-family:"Times New Roman","serif";mso-fareast-font-family: "Times New Roman";mso-ansi-language:EN;mso-fareast-language:FR;mso-bidi-language: AR-SA"> paper, w </span> <b> <span style="font-size: 10pt; line-height: 115%; font-family: "Times New Roman", serif; border: none;">e </span> </b> <span lang="EN" style="font-size:10.0pt; line-height:115%;font-family:"Times New Roman","serif";mso-fareast-font-family: "Times New Roman";mso-ansi-language:EN;mso-fareast-language:FR;mso-bidi-language: AR-SA"> present the results of an experimental investigation on the effects of </span> <span style="font-size: 10pt; line-height: 115%; font-family: "Times New Roman", serif; border: none;">the blades orientation </span> <span style="font-size: 10pt; line-height: 115%; font-family: "Times New Roman", serif; letter-spacing: -0.65pt; border: none;"> on a </span> <span style="font-size: 10pt; line-height: 115%; font-family: "Times New Roman", serif; border: none;">cross-flow water turbine performance. Four similar test models ( </span> <span lang="EN" style="font-size: 10.0pt;line-height:115%;font-family:"Times New Roman","serif";mso-fareast-font-family: "Times New Roman";mso-ansi-language:EN;mso-fareast-language:FR;mso-bidi-language: AR-SA">same dimensions and blades </span> <span style="font-size: 10pt; line-height: 115%; font-family: "Times New Roman", serif; border: none;">) bur for different blades orientation angle </span> <span lang="EN" style="font-size:10.0pt; line-height:115%;font-family:"Times New Roman","serif";mso-fareast-font-family: "Times New Roman";mso-ansi-language:EN;mso-fareast-language:FR;mso-bidi-language: AR-SA">i = 1.75 °, 4.5 °, - 1.75 ° and - 4.5 ° have been tested to evaluate the performance of this vertical axis water turbine (VAWT) </span> <span lang="EN" style="font-size: 10pt; line-height: 115%; font-family: "Times New Roman", serif; border: none;">, </span> <span lang="EN" style="font-size:10.0pt;line-height:115%;font-family:"Times New Roman","serif"; mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN;mso-fareast-language: FR;mso-bidi-language:AR-SA"> for several water flow velocities V varying from 0.3 to 0.59 m/s, which correspond to a water free flow Reynolds number of </span> <span lang="EN" style="font-size: 10pt; line-height: 115%; font-family: "Times New Roman", serif; border: none;"> </span> <span lang="EN" style="font-size:10.0pt;line-height:115%;font-family:"Times New Roman","serif"; mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN;mso-fareast-language: FR;mso-bidi-language:AR-SA">2.08 10 <sup>4 </sup> </span> <span lang="EN" style="font-size: 10pt; line-height: 115%; font-family: "Times New Roman", serif; border: none;">to </span> <span lang="EN" style="font-size:10.0pt;line-height:115%;font-family:"Times New Roman","serif"; mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN;mso-fareast-language: FR;mso-bidi-language:AR-SA">4.36 10 <sup>4 </sup>. An analysis of these experimental results has shown that the best performance (biggest power and power coefficient) was obtained for the test model with its blades orientation angle set to 1.75 ° and the worst performance was given for the test model blades orientation of -4.5 °. A comparison of the present results </span> <span lang="EN" style="font-size: 10pt; line-height: 115%; font-family: "Times New Roman", serif; border: none;"> with those obtained in a previous experimentation for a similar test model but with </span> <span lang="EN" style="font-size:10.0pt;line-height:115%;font-family:"Times New Roman","serif"; mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN;mso-fareast-language: FR;mso-bidi-language:AR-SA">i </span> <span lang="EN" style="font-size: 10pt; line-height: 115%; font-family: "Times New Roman", serif; border: none;"> </span> <span lang="EN" style="font-size:10.0pt; line-height:115%;font-family:"Times New Roman","serif";mso-fareast-font-family: "Times New Roman";mso-ansi-language:EN;mso-fareast-language:FR;mso-bidi-language: AR-SA">= </span> <span lang="EN" style="font-size: 10pt; line-height: 115%; font-family: "Times New Roman", serif; border: none;"> 0 °, </span> <span lang="EN" style="font-size:10.0pt; line-height:115%;font-family:"Times New Roman","serif"}, number={4}, publisher={ISRES Publishing}