Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "axis wind turbine" wg kryterium: Wszystkie pola


Tytuł:
Numerical modeling of vertical axis wind turbine with air guides
Autorzy:
Kołodziejczyk, Krzysztof
Ptak, Radosław
Korman, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/2064368.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
vertical axis wind turbine
numerical modeling
turbina wiatrowa o pionowej osi
modelowanie numeryczne
energia ze źródeł odnawialnych
Opis:
Currently, obtaining energy from renewable sources, as never before, it has become one of the most important areas, but at the same time challenges in human activities. This is the effect of many factors simultaneously, including because of the media trumpeted the greenhouse effect, the necessity of reducing CO2 emissions, shrinking natural resources, and thus the desire to protect their welfare including conservation (including natural resources) for future generations. The paper presents the results of preliminary numerical analyzes of work for vertical axis wind turbines equipped with air guides. The carried out analyzes indicate the potential possibility of using this type of construction in practice. The obtained power factor value is higher than in classic wind turbines with a vertical axis. The conducted analyzes also indicate the possibility of optimizing the proposed constructional solution in order to increase efficiency of obtaining energy from the wind.
Źródło:
New Trends in Production Engineering; 2019, 2, 1; 589--595
2545-2843
Pojawia się w:
New Trends in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical modeling and preliminary validation of drag-based vertical axis wind turbine
Autorzy:
Krysiński, T.
Buliński, Z.
Nowak, A. J.
Powiązania:
https://bibliotekanauki.pl/articles/240209.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
numerical modeling
numerical axis wind turbine
computational fluid dynamics (CFD)
modelowanie numeryczne
turbina wiatrowa
komputerowa mechanika płynów
Opis:
The main purpose of this article is to verify and validate the mathematical description of the airflow around a wind turbine with vertical axis of rotation, which could be considered as representative for this type of devices. Mathematical modeling of the airflow around wind turbines in particular those with the vertical axis is a problematic matter due to the complex nature of this highly swirled flow. Moreover, it is turbulent flow accompanied by a rotation of the rotor and the dynamic boundary layer separation. In such conditions, the key aspects of the mathematical model are accurate turbulence description, definition of circular motion as well as accompanying effects like centrifugal force or the Coriolis force and parameters of spatial and temporal discretization. The paper presents the impact of the different simulation parameters on the obtained results of the wind turbine simulation. Analysed models have been validated against experimental data published in the literature.
Źródło:
Archives of Thermodynamics; 2015, 36, 1; 19-38
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Steady and unsteady analysis of NACA 0018 airfoil in vertical-axis wind turbine
Autorzy:
Rogowski, K.
Hansen, M. O. L.
Maroński, R.
Powiązania:
https://bibliotekanauki.pl/articles/279244.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
airfoil characteristics
vertical-axis wind turbine
computational fluid dynamics
Opis:
Numerical results are presented for aerodynamic unsteady and steady airfoil characteristics of the NACA 0018 airfoil of a two-dimensional vertical-axis wind turbine. A geometrical model of the Darrieus-type wind turbine and the rotor operating parameters used for numerical simulation are taken from the literature. Airfoil characteristics are investigated using the same mesh distribution around the airfoil edges and two turbulence models: the RNG k-ε and the SST Transition. Computed results for the SST Transition model are in good agreement with the experiment, especially for static airfoil characteristics.
Źródło:
Journal of Theoretical and Applied Mechanics; 2018, 56, 1; 203-212
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling the structural dynamics of chosen components of the horizontal axis wind turbine
Autorzy:
Pawlak, M.
Jureczko, M.
Czapla, T.
Powiązania:
https://bibliotekanauki.pl/articles/242224.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
HAWT
hub
Planet Carrier
Blade Element Momentum theory
Opis:
As the horizontal axis wind turbines are getting larger, their dynamic behaviour is becoming more important. Dynamic analysis gives knowledge how to improve efficiency and safety also in small wind turbines. This article describes numerical models of chosen components of upwind, three-bladed wind turbine. Geometry of each component is generated separately and then assembled together by transformation matrices. Material of the blades is composite, the hub is assumed to be made of steel and material of the planet carrier is casted iron. These mentioned components are modelled by shell elements. The numerical model of the hub takes into account aerodynamic and gravity loads of blades, inertia forces due to rotation of the rotor and aerodynamic damping. The aerodynamic loads, calculated according to the modified Blade Element Momentum theory, are attached to aerodynamic centres. Wind conditions were assumed for I-class wind turbine according to Germanischer Lloyd. Stress Reserve Factors were calculated for DLC 6.1 load case according to Germanischer Lloyd, too. As a first step, numerical strength analysis with using AnSYS software was performed with maximum values of principal stresses as an output. Then, based on FEM analysis results, Stress Reserve Factors were calculated. SRF values show that analyzed hub and planet carrier have sufficient strength for extreme loads. Methodology of safety margin evaluation presented in this paper allows assessing if the object fulfils relevant standards demanding.
Źródło:
Journal of KONES; 2011, 18, 2; 349-354
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Generator do elektrowni wiatrowej o pionowej osi obrotu
Generator for Vertical Axis Wind Turbine
Autorzy:
Goryca, Z.
Mazur, D.
Powiązania:
https://bibliotekanauki.pl/articles/1368423.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
elektrownia wiatrowa
generator
analiza termiczna
moment zaczepowy
wind turbine
thermal analysis
cogging torque
Opis:
The paper presents the construction and chosen results of test for generator of the power of 2kW and rotational speed of 180 rev/min destined for small wind power plant of vertical axis. Turbine of the type H-Darrieus having low rotational speed and cogging torque was applied in the power plant. Therefore the generator has to have low cogging torque allowing for start-up of power plant and low rotational Speer adjusted to turbine speed. During the process of the generator construction, new patented methods allowing for minimization of cogging torque and all available methods decreasing its mass were used. Chosen results of test for generator show relationship between output voltage of generator and its rotational speed and additionally presents the output voltage waveform. Presented generator has low mass, high efficiency and extremely low cogging torque.
W artykule przedstawiono konstrukcję i wybrane wyniki badań generatora o mocy 2 kW i prędkości obrotowej 180 obr./min. przeznaczonego do małej elektrowni wiatrowej o pionowej osi obrotu. W elektrowni zastosowano turbinę typu H-Darrieus charakteryzującą się małą prędkością obrotową i niską wartością momentu rozruchowego. Z tego względu generator musi mieć mały moment zaczepowy ułatwiający rozruch elektrowni i małą prędkość obrotową dostosowaną do prędkości turbiny. Przy konstruowaniu generatora wykorzystano nowy, opatentowany sposób minimalizacji momentu zaczepowego oraz zastosowano wszystkie możliwe zabiegi zmniejszające jego masę. Wybrane wyniki badań obrazują zależność napięcia wyjściowego generatora od prędkości obrotowej i od obciążenia oraz przedstawiają kształt tego napięcia. Opracowany generator charakteryzuje się małą masą, dużą sprawnością oraz niezwykle małym momentem zaczepowym.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2013, 2, 99; 133-137
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power spectrum analysis for determination of the number of Vertical Axis Wind Turbine blades
Autorzy:
Anweiler, S.
Fedak, W.
Gancarski, W.
Ulbrich, R.
Powiązania:
https://bibliotekanauki.pl/articles/95342.pdf
Data publikacji:
2017
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
renewable energy sources
wind turbine
VAWT
power spectrum
hydrodynamic force
odnawialne źródła energii
turbina wiatrowa
turbiny wiatrowe o osi pionowej
widmo mocy
Opis:
Technology of wind exploitation has been applied widely all over the world and has already reached the level in which manufacturers want to maximize the yield with the minimum investment outlays. The main objective of this paper is the determination of the optimal number of blades in the Cup-Bladed Vertical Axis Wind Turbine. Optimizing the size of the Vertical Axis Wind Turbine allow the reduction of costs and increase the output. The target is the maximum power of the rotor. The optimum number of Vertical Axis Wind Turbine blades evaluation is based on analysis of a single blade simulation and its superposition for the whole rotor. The simulation of working blade was done in MatLab environment. Power spectrum graphs were prepared and compared throughout superposition of individual blades in the Vertical Axis Wind Turbine rotor. Some wind tunnel measurements of the hydrodynamic force according to pitch angle of the blade are also shown. The major result of this research is the Vertical Axis Wind Turbine kmax ratiopower characteristic. On the basis of the analysis of the power spectra, optimum number of the blades was specified for the analysed rotor. Power spectrum analysis of wind turbine enabled the specification of the optimal number of blades, and can be used regarding investment outlays and power output of the Vertical Axis Wind Turbine.
Źródło:
Journal of Mechanical and Energy Engineering; 2017, 1, 2; 153-161
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The characteristics of the operating parameters of the vertical axis wind turbine for the selected wind speed
Autorzy:
Kamiński, Z.
Czyż, Z.
Powiązania:
https://bibliotekanauki.pl/articles/102107.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
wind turbine
renewable energy
wind tunnel
drive torque
power
Opis:
The article presents the results of examining a wind turbine on the vertical axis of rotation. The study was conducted in an open circuit wind tunnel Gunt HM 170 in the laboratory of the Department of Thermodynamics, Fluid Mechanics and Aviation Propulsion Systems at Lublin University of Technology. The subject of research was a rotor based on the patent PL 219985, with blades capable of altering the surface of the active area (receiving kinetic energy of the wind). The study was performed on appropriately scaled and geometrically similar models maintaining, relevant to the type of research, the criterion numbers. The studied rotors with different blade inclination angles were produced using a 3D powder printer ZPrinter® 450. The results of the conducted research were obtained for the flow velocity of 6.5 m/s and three inclination angles, 30°, 60°, and 90°, at variable rotational speed. The test equipment used in the study allows maintaining the required speed, recording velocity and torque, which in turn allows an engineer to measure such characteristics of torque and power as a function of rotor speed.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 1; 58-65
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Analysis of a Small-Size Vertical-Axis Wind Turbine Performance and Averaged Flow Parameters Around the Rotor
Autorzy:
Rogowski, K.
Maroński, R.
Piechna, J.
Powiązania:
https://bibliotekanauki.pl/articles/140198.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
vertical-axis wind turbine
aerodynamics
computational fluid dynamics
turbina wiatrowa o pionowej osi obrotu
aerodynamika
obliczeniowa dynamika płynów
Opis:
Small-scale vertical-axis wind turbines can be used as a source of electricity in rural and urban environments. According to the authors’ knowledge, there are no validated simplified aerodynamic models of these wind turbines, therefore the use of more advanced techniques, such as for example the computational methods for fluid dynamics is justified. The paper contains performance analysis of the small-scale vertical-axis wind turbine with a large solidity. The averaged velocity field and the averaged static pressure distribution around the rotor have been also analyzed. All numerical results presented in this paper are obtained using the SST k- ω turbulence model. Computed power coefficients are in good agreement with the experimental results. A small change in the tip speed ratio significantly affects the velocity field. Obtained velocity fields can be further used as a base for simplified aerodynamic methods.
Źródło:
Archive of Mechanical Engineering; 2017, LXIV, 2; 205-218
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CFD computation of the savonius rotor
Autorzy:
Rogowski, K.
Maroński, R.
Powiązania:
https://bibliotekanauki.pl/articles/280680.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
vertical axis wind turbine
simulation
computational fluid dynamics (CFD)
Opis:
In this paper, Computational Fluid Dynamics (CFD) analysis of a two-dimensional two- -bucket Savonius rotor, using ANSYS Fluent solver, is presented. Computational methods of fluid dynamics are used to estimate the aerodynamic forces acting on the rotor, the torque and the power extracted by the Savonius rotor. In addition, an analysis of the results for different turbulence models is performed. Numerical investigations are compared with the experiment of the Sandia National Laboratories.
Źródło:
Journal of Theoretical and Applied Mechanics; 2015, 53, 1; 37-45
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Velocity field around darrieus wind turbine rotor using actuator cell model and other CFD methods
Autorzy:
Rogowski, Krzysztof
Rogowska, Klaudia
Powiązania:
https://bibliotekanauki.pl/articles/1955276.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska
Tematy:
CFD
vertical-axis wind turbine
aerodynamic blade loads
wake modeling
Opis:
The main purpose of this work is to analyze the usefulness of the active cell model (ACM) developed by the author of this article to estimate the flow field around a single-bladedvertical-axis wind turbine (VAWT) with the Darrieus-type rotor. The obtained flow velocity fields were compared with the experimental values taken from the literature available on the Internet. Additionally, the flow fields around the rotor and the aerodynamic forces were determined using the following approaches: the ke RNG turbulence model, the scale-adaptive simulation (SAS) and the laminar model. The velocity profiles behind the turbine rotor obtained with all numerical approaches are consistent with the experiment. The aerodynamic blade loads obtained using numerical methods also appear to be satisfactory.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2018, 22, 3; 195--209
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies