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An artificial intelligence approach to enhance blade element momentum theory performance for horizontal axis wind turbine application / Ahmed Ladjal 

Public ISBD Titre : An artificial intelligence approach to enhance blade element momentum theory performance for horizontal axis wind turbine application Type de document : document électronique Auteurs : Ahmed Ladjal, Auteur ; Abdelhamid Bouhelal, Directeur de thèse ; Smaili, Arezki, Directeur de thèse Editeur : [S.l.] : [s.n.] Année de publication : 2020 Importance : 1 fichier PDF (3.1 M) Présentation : ill. Note générale : Mode d'accès : accès au texte intégral par intranet. Mémoire de Projet de Fin d’Études : Génie Mécanique : Alger, École Nationale Polytechnique : 2020 Bibliogr. f. 84 - 87 Langues : Anglais (eng) Mots-clés : Horizontal  axis  wind  turbines  (HAWT)  ;  BEMtheory  ;  Artificial  neural  networks  (ANNs)  ;  Angle  of  attack  (AOA)  ;  Neurons  number Index. décimale : PM02220 Résumé : So far, the Blade Element Momentum (BEM) theory remains the most widely used method for predicting aerodynamic performance of horizontal axis wind turbines (HAWTs) owing to its simplicity. The BEM theory is mainly based on airfoils data for wide range of conditions (airfoil shape, angles of attack (AOAs)). These data are usually collected in wind tunnel experiments for stationary airfoils at low AOAs. However, a rotating wind turbine, has higher AOAs. The motivation behind this work is to improve the classical BEM method by determining the airfoil performance coefficients where little or no experimental data exists such as at high AOAs, new airfoils shape and for low Reynolds numbers. For this purpose, an artificial intelligence approach, namely Artificial Neural Networks (ANNs) is proposed for predicting the airfoils lift and drag coefficients. Firstly, the optimum number of layers as well as the optimum neurons number for training input-output data have beenselected numerically. Afterwards, the results of the proposed BEM-ANN method have beencompared with available experimental results in order to investigate its validity.Good agreementswereobtainedbetween numerical predictions and experimental results. An artificial intelligence approach to enhance blade element momentum theory performance for horizontal axis wind turbine application [document électronique] / Ahmed Ladjal, Auteur ; Abdelhamid Bouhelal, Directeur de thèse ; Smaili, Arezki, Directeur de thèse . - [S.l.] : [s.n.], 2020 . - 1 fichier PDF (3.1 M) : ill. Mode d'accès : accès au texte intégral par intranet. Mémoire de Projet de Fin d’Études : Génie Mécanique : Alger, École Nationale Polytechnique : 2020 Bibliogr. f. 84 - 87 Langues : Anglais (eng) Mots-clés : Horizontal  axis  wind  turbines  (HAWT)  ;  BEMtheory  ;  Artificial  neural  networks  (ANNs)  ;  Angle  of  attack  (AOA)  ;  Neurons  number Index. décimale : PM02220 Résumé : So far, the Blade Element Momentum (BEM) theory remains the most widely used method for predicting aerodynamic performance of horizontal axis wind turbines (HAWTs) owing to its simplicity. The BEM theory is mainly based on airfoils data for wide range of conditions (airfoil shape, angles of attack (AOAs)). These data are usually collected in wind tunnel experiments for stationary airfoils at low AOAs. However, a rotating wind turbine, has higher AOAs. The motivation behind this work is to improve the classical BEM method by determining the airfoil performance coefficients where little or no experimental data exists such as at high AOAs, new airfoils shape and for low Reynolds numbers. For this purpose, an artificial intelligence approach, namely Artificial Neural Networks (ANNs) is proposed for predicting the airfoils lift and drag coefficients. Firstly, the optimum number of layers as well as the optimum neurons number for training input-output data have beenselected numerically. Afterwards, the results of the proposed BEM-ANN method have beencompared with available experimental results in order to investigate its validity.Good agreementswereobtainedbetween numerical predictions and experimental results.

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité	Spécialité	Etat_Exemplaire
EP00252	PM02220	Ressources électroniques	Bibliothèque centrale	Projet Fin d'Etudes	Disponible	Genie_mecanique	Téléchargeable

Documents numériques

LADJAL.Ahmed.pdf URL

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