رسالة جامعية
Πειραματική και υπολογιστική διερεύνηση αεροδυναμικής συμπεριφοράς πτερύγων σε διφασική ροή αέρα-νερού και εφαρμογή σε πτερύγια ανεμοκινητήρων ; Experimental and computational study of the aerodynamic behavior of wings in two-phase flow and the application on wind turbine blades
| العنوان: | Πειραματική και υπολογιστική διερεύνηση αεροδυναμικής συμπεριφοράς πτερύγων σε διφασική ροή αέρα-νερού και εφαρμογή σε πτερύγια ανεμοκινητήρων ; Experimental and computational study of the aerodynamic behavior of wings in two-phase flow and the application on wind turbine blades |
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| المؤلفون: | Douvi, Eleni, Δουβή, Ελένη |
| بيانات النشر: | University of Patras Πανεπιστήμιο Πατρών |
| سنة النشر: | 2014 |
| المجموعة: | National Archive of PhD Theses (National Documentation Centre Greece) |
| مصطلحات موضوعية: | Πειραματική διερεύνηση, Υπολογιστική διερεύνηση, Αεροδυναμική συμπεριφορά, Διφασική ροή, Αεροτομή, Πτέρυγα, Πτερύγιο ανεμοκινητήρα, Αεροδυναμικοί συντελεστές, Experimental study, Computational study, Aerodynamic behavior, Two-phase flow, Airfoill, Wing, Wind turbine blade, Aerodynamic coefficients, Επιστήμες Μηχανικού και Τεχνολογία, Άλλες Επιστήμες Μηχανικού και Τεχνολογίες, Engineering and Technology, Other Engineering and Technologies |
| الوصف: | The aim of the present doctoral thesis is the experimental and computational study of the aerodynamic behavior of wings in two-phase flow and the application on wind turbine blades. First of all, experimental and computational study of one-phase flow over airfoils, wings and wind turbine blade and afterwards study of two-phase flow over the same bodies is conducted. The comparison of the results between dry and wet conditions is necessary in order to show the effects of two-phase flow at the aerodynamic performance.Wind tunnel tests were conducted to show the aerodynamic behavior of airfoils and wings in one-phase and two-phase flows. To simulate two-phase flow, the wind tunnel of the Fluid Mechanics Laboratory has to be configured with adding commercial rain simulated nozzles. For the experiments NACA 0012 airfoils and wings which come along the wind turbine are utilized and airfoil and wings S809 are constructed. The experiments of one-phase flow and two-phase flow are conducted for the same air velocity. For the two-phase flow four different Liquid Water Contents are examined.For the computational analysis the commercial CFD code ANSYS Fluent is used. In first place, simulations of one-phase flow over the NACA 0012 airfoil are done with three different turbulence models. The NACA0012 airfoil is chosen because it has been studied in depth and has a precise data base to compare the results of the simulation with.The lift coefficients are computed with accuracy in contrast to the drag coefficient. The overprediction of drag is expected since the actual airfoil has laminar flow over the forward half. The turbulence models cannot calculate the transition point from laminar to turbulent and consider that the boundary layer is turbulent throughout its length. Therefore, it is necessary to compare the computational results with experimental data of a fully turbulent boundary layer. In order to get more accurate results, the computational domain could be split into two different domains to run mixed laminar and ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | Greek, Modern (1453-) |
| العلاقة: | http://hdl.handle.net/10442/hedi/39862Test |
| DOI: | 10.12681/eadd/39862 |
| الإتاحة: | https://doi.org/10.12681/eadd/39862Test http://hdl.handle.net/10442/hedi/39862Test |
| رقم الانضمام: | edsbas.F439180E |
| قاعدة البيانات: | BASE |
| DOI: | 10.12681/eadd/39862 |
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