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Contribution to the aerodynamic study of the air- sand flow around a wind turbine blade / Abdelhamid Bouhelal 

Public ISBD Titre : Contribution to the aerodynamic study of the air- sand flow around a wind turbine blade Type de document : texte imprimé Auteurs : Abdelhamid Bouhelal, Auteur ; Smaili, Arezki, Directeur de thèse ; Ouahiba Guerri, Directeur de thèse ; Christian Masson, Directeur de thèse Editeur : [S.l.] : [s.n.] Année de publication : 2018 Importance : 152 f. Présentation : ill. Format : 30 cm. Accompagnement : 1 CD-ROM. Note générale : Thèse de Doctorat : Génie Mécanique : Alger, École Nationale Polytechnique : 2018 Bibliogr. f. 129 - 146 . Annexe f. 147 - 152 Langues : Anglais (eng) Mots-clés : Wind  energy  ;  Aerodynamic  analysis  ;  Numerical  simulation  ;  Turbulence  models  ;  Eulerian-Lagrangian  approach  ;  Sand  effect Index. décimale : D003618 Résumé : The subject of this thesis deals with the numerical simulation of turbulent flow around a horizontal axis wind turbine (HAWT) blade installed in Saharan climate. To do this, a 3D CFD method was developed based on the resolution of the Reynolds averaged Navier-Stokes equations (RANS). This thesis work focuses on two parts. The first part is to study the ability of different RANS turbulence models to predict the aerodynamic performances and the velocity in the wake of HAWTs. The second part is to investigate the sand effects on the aerodynamic performance of wind turbines installed in a desert environment based on an Eulerian-Lagrangian approach. The results of the simulation showed that the choice of the turbulence model has a significant effect on the accuracy of numerical predictions, especially for high wind speeds. It was also noted that the presence of sand particles could significantly reduce the aerodynamic performance. Contribution to the aerodynamic study of the air- sand flow around a wind turbine blade [texte imprimé] / Abdelhamid Bouhelal, Auteur ; Smaili, Arezki, Directeur de thèse ; Ouahiba Guerri, Directeur de thèse ; Christian Masson, Directeur de thèse . - [S.l.] : [s.n.], 2018 . - 152 f. : ill. ; 30 cm. + 1 CD-ROM. Thèse de Doctorat : Génie Mécanique : Alger, École Nationale Polytechnique : 2018 Bibliogr. f. 129 - 146 . Annexe f. 147 - 152 Langues : Anglais (eng) Mots-clés : Wind  energy  ;  Aerodynamic  analysis  ;  Numerical  simulation  ;  Turbulence  models  ;  Eulerian-Lagrangian  approach  ;  Sand  effect Index. décimale : D003618 Résumé : The subject of this thesis deals with the numerical simulation of turbulent flow around a horizontal axis wind turbine (HAWT) blade installed in Saharan climate. To do this, a 3D CFD method was developed based on the resolution of the Reynolds averaged Navier-Stokes equations (RANS). This thesis work focuses on two parts. The first part is to study the ability of different RANS turbulence models to predict the aerodynamic performances and the velocity in the wake of HAWTs. The second part is to investigate the sand effects on the aerodynamic performance of wind turbines installed in a desert environment based on an Eulerian-Lagrangian approach. The results of the simulation showed that the choice of the turbulence model has a significant effect on the accuracy of numerical predictions, especially for high wind speeds. It was also noted that the presence of sand particles could significantly reduce the aerodynamic performance.

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité	Spécialité	Etat_Exemplaire
T000160	D003618	Papier	Bibliothèque Annexe	Thèse de Doctorat	Disponible	Genie_mecanique	Consultation sur place
T000159	D003618	Papier	Bibliothèque centrale	Thèse de Doctorat	Disponible	Genie_mecanique	Consultation sur place

Documents numériques

BOUHELAL.Abdelhamid.pdf URL

Effects of terrain slope on nacelle anemometry / Khaled Ameur in Transactions of the ASME. Journal of solar energy engineering, Vol. 134 N° 3 (Août 2012) 

Public ISBD [article]  in Transactions of the ASME. Journal of solar energy engineering > Vol. 134 N° 3 (Août 2012) . - 10 p. Titre : Effects of terrain slope on nacelle anemometry Type de document : texte imprimé Auteurs : Khaled Ameur, Auteur ; Christian Masson, Auteur Année de publication : 2012 Article en page(s) : 10 p. Note générale : solar energy Langues : Anglais (eng) Mots-clés : wind  turbine;  nacelle  anemomerty;  escarpment;  3D  RANS;  atmospheric  boundary  layer Index. décimale : 621.47 Résumé : A numerical analysis of the effects of sloped terrain on the reading of a nacelle anemometer is investigated. Simulations of the turbulent flow around a 2.5 MW wind turbine in an atmospheric boundary layer are made by resolving 3D RANS equations. In addition to flat terrain, four escarpments (at slopes of 7.5%, 11%, 14%, and 20%) are studied for various inlet velocities in three cases: terrains with no wind turbine, with nonoperating turbines and with operating turbines. The slope of the ground has two major effects on flow: speed-up and an increase in flow inclination. The presence of the nacelle enhances the flow speed-up caused by the escarpment, especially outside the anemometer's position. However, the horizontal velocity at the location of the anemometer tends to decrease with increasing ground slope. This trend is due in large part to the nacelle wake. This disturbed area is characterized by the presence of separated flow and two opposing vortices which are sensitive to the flow inclination. The evaluated nacelle transfer function is influenced by the terrain slope but this sensitivity is reduced by displacing the position of the anemometer upward the nacelle body. DEWEY : 621.47 ISSN : 0199-6231 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO000134000003 [...] [article] Effects of terrain slope on nacelle anemometry [texte imprimé] / Khaled Ameur, Auteur ; Christian Masson, Auteur . - 2012 . - 10 p. solar energy Langues : Anglais (eng) in Transactions of the ASME. Journal of solar energy engineering > Vol. 134 N° 3 (Août 2012) . - 10 p. Mots-clés : wind  turbine;  nacelle  anemomerty;  escarpment;  3D  RANS;  atmospheric  boundary  layer Index. décimale : 621.47 Résumé : A numerical analysis of the effects of sloped terrain on the reading of a nacelle anemometer is investigated. Simulations of the turbulent flow around a 2.5 MW wind turbine in an atmospheric boundary layer are made by resolving 3D RANS equations. In addition to flat terrain, four escarpments (at slopes of 7.5%, 11%, 14%, and 20%) are studied for various inlet velocities in three cases: terrains with no wind turbine, with nonoperating turbines and with operating turbines. The slope of the ground has two major effects on flow: speed-up and an increase in flow inclination. The presence of the nacelle enhances the flow speed-up caused by the escarpment, especially outside the anemometer's position. However, the horizontal velocity at the location of the anemometer tends to decrease with increasing ground slope. This trend is due in large part to the nacelle wake. This disturbed area is characterized by the presence of separated flow and two opposing vortices which are sensitive to the flow inclination. The evaluated nacelle transfer function is influenced by the terrain slope but this sensitivity is reduced by displacing the position of the anemometer upward the nacelle body. DEWEY : 621.47 ISSN : 0199-6231 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO000134000003 [...]