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## CFD Hydrodynamics Forces Determination for a Darrieus Turbine Rotating Blades Using K-ε Turbulence Model

#### Abdelouahab BENZERDJEB [1] , Bouabdellah ABED [2] , Habib ACHACHE [3] , Abdeljellil BENMANSOUR [4] , Mohammed HAMEL [5] , Abderrahmane DEBZ [6] , Mohammed K. HAMIDOU [7]

Determination of hydrodynamic forces acting on the blades of Darrieus turbine used to harness water energy from dams, rivers and ocean is very important to evaluate this turbine performance. Therefore, this paper presents the numerical results of CFD investigation using K-ε closure turbulence model. This simulation has been performed for a hydro Darrieus turbine that we have previously tested experimentally; this turbine has a diameter of 21.5 cm and it is composed of three NACA0020 blades, with a height of 23 cm and a cord of 7 cm, that are fixed with a separation angle of 120 °. The present simulation has been carried out for a water flow velocity of 0.67 m/s and the Darrieus turbine rotating velocity of 125 rpm. These values correspond to a specific velocity λ equal to 2, a flow Reynolds number Rev equal to 4.57 104, a rotational Reynolds number Reu equal to 1.97 105 and a relative Reynolds number Rew varying between 4.72 104 and 1.39 105. The graphical presentations of the simulation numerical results have shown practically identical curves, respectively for the hydrodynamic lift and drag forces variations versus the rotational angle (position angle of each blade) with a phase angle of 120° between the first blade and the second one and of 240° between the first blade and the third one. The hydrodynamic blade element lift force varies between 0.0454 and 0.641 N while the drag force varies between - 0.0968 and 0.342 N. The global turbine hydrodynamic lift and drag forces (for the three blades elements together) varies respectively between 0.5928 and 0.9251 N and between 0.0335 and 0.2497 N. The maximal values show that the lift is about twice the drag for each blade and about four times for this turbine. The turbine average lift and drag forces over three rotations are respectively 32.38 N and 6.61 N.

Water energy, Darrieus turbine, Hydrodynamic forces, Simulation, Turbulence model
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Birincil Dil en Mühendislik Makaleler Yazar: Abdelouahab BENZERDJEB Yazar: Bouabdellah ABED Yazar: Habib ACHACHE Yazar: Abdeljellil BENMANSOUR Yazar: Mohammed HAMEL Yazar: Abderrahmane DEBZ Yazar: Mohammed K. HAMIDOU Yayımlanma Tarihi : 24 Kasım 2019
 Bibtex @araştırma makalesi { epstem650445, journal = {The Eurasia Proceedings of Science Technology Engineering and Mathematics}, issn = {}, eissn = {2602-3199}, address = {isresoffice@gmail.com}, publisher = {ISRES Organizasyon Turizm Eğitim Danışmanlık Ltd. Şti.}, year = {2019}, volume = {7}, pages = {1 - 8}, doi = {}, title = {CFD Hydrodynamics Forces Determination for a Darrieus Turbine Rotating Blades Using K-ε Turbulence Model}, key = {cite}, author = {BENZERDJEB, Abdelouahab and ABED, Bouabdellah and ACHACHE, Habib and BENMANSOUR, Abdeljellil and HAMEL, Mohammed and DEBZ, Abderrahmane and HAMIDOU, Mohammed K.} } APA BENZERDJEB, A , ABED, B , ACHACHE, H , BENMANSOUR, A , HAMEL, M , DEBZ, A , HAMIDOU, M . (2019). CFD Hydrodynamics Forces Determination for a Darrieus Turbine Rotating Blades Using K-ε Turbulence Model. The Eurasia Proceedings of Science Technology Engineering and Mathematics , 7 () , 1-8 . Retrieved from https://dergipark.org.tr/tr/pub/epstem/issue/50288/650445 MLA BENZERDJEB, A , ABED, B , ACHACHE, H , BENMANSOUR, A , HAMEL, M , DEBZ, A , HAMIDOU, M . "CFD Hydrodynamics Forces Determination for a Darrieus Turbine Rotating Blades Using K-ε Turbulence Model". The Eurasia Proceedings of Science Technology Engineering and Mathematics 7 (2019 ): 1-8 Chicago BENZERDJEB, A , ABED, B , ACHACHE, H , BENMANSOUR, A , HAMEL, M , DEBZ, A , HAMIDOU, M . "CFD Hydrodynamics Forces Determination for a Darrieus Turbine Rotating Blades Using K-ε Turbulence Model". The Eurasia Proceedings of Science Technology Engineering and Mathematics 7 (2019 ): 1-8 RIS TY - JOUR T1 - CFD Hydrodynamics Forces Determination for a Darrieus Turbine Rotating Blades Using K-ε Turbulence Model AU - Abdelouahab BENZERDJEB , Bouabdellah ABED , Habib ACHACHE , Abdeljellil BENMANSOUR , Mohammed HAMEL , Abderrahmane DEBZ , Mohammed K. HAMIDOU Y1 - 2019 PY - 2019 N1 - DO - T2 - The Eurasia Proceedings of Science Technology Engineering and Mathematics JF - Journal JO - JOR SP - 1 EP - 8 VL - 7 IS - SN - -2602-3199 M3 - UR - Y2 - 2020 ER - EndNote %0 The Eurasia Proceedings of Science Technology Engineering and Mathematics CFD Hydrodynamics Forces Determination for a Darrieus Turbine Rotating Blades Using K-ε Turbulence Model %A Abdelouahab BENZERDJEB , Bouabdellah ABED , Habib ACHACHE , Abdeljellil BENMANSOUR , Mohammed HAMEL , Abderrahmane DEBZ , Mohammed K. HAMIDOU %T CFD Hydrodynamics Forces Determination for a Darrieus Turbine Rotating Blades Using K-ε Turbulence Model %D 2019 %J The Eurasia Proceedings of Science Technology Engineering and Mathematics %P -2602-3199 %V 7 %N %R %U ISNAD BENZERDJEB, Abdelouahab , ABED, Bouabdellah , ACHACHE, Habib , BENMANSOUR, Abdeljellil , HAMEL, Mohammed , DEBZ, Abderrahmane , HAMIDOU, Mohammed K. . "CFD Hydrodynamics Forces Determination for a Darrieus Turbine Rotating Blades Using K-ε Turbulence Model". The Eurasia Proceedings of Science Technology Engineering and Mathematics 7 / (Kasım 2019): 1-8 . AMA BENZERDJEB A , ABED B , ACHACHE H , BENMANSOUR A , HAMEL M , DEBZ A , HAMIDOU M . CFD Hydrodynamics Forces Determination for a Darrieus Turbine Rotating Blades Using K-ε Turbulence Model. EPSTEM. 2019; 7: 1-8. Vancouver BENZERDJEB A , ABED B , ACHACHE H , BENMANSOUR A , HAMEL M , DEBZ A , HAMIDOU M . CFD Hydrodynamics Forces Determination for a Darrieus Turbine Rotating Blades Using K-ε Turbulence Model. The Eurasia Proceedings of Science Technology Engineering and Mathematics. 2019; 7: 8-1.

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