Relevant bibliographies by topics / QBlade

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'QBlade'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "QBlade"

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Alaskari, Mustafa, Oday Abdullah, and Mahir H. Majeed. "Analysis of Wind Turbine Using QBlade Software." IOP Conference Series: Materials Science and Engineering 518 (June 5, 2019): 032020. http://dx.doi.org/10.1088/1757-899x/518/3/032020.

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Kądrowski, Damian, Michał Kulak, Michał Lipian, Małgorzata Stępień, Piotr Baszczyński, Karol Zawadzki, and Maciej Karczewski. "Challenging low Reynolds - SWT blade aerodynamics." MATEC Web of Conferences 234 (2018): 01004. http://dx.doi.org/10.1051/matecconf/201823401004.

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One of the main issues related to the design and development of small wind turbines (SWTs) is the low Reynolds number. Operation in the transitory regime makes the rotor aerodynamic analysis a challenging task. Project GUST (Generative Urban Small Turbine) realized currently at the Institute of Turbomachinery (Lodz University of Technology, Poland) is devoted to the development of SWT (D = 1.6 m) for low-Reynolds number (low wind speed) flow conditions. The emphasis is on the blade design, aiming at improving the rotor aerodynamic efficiency. The paper will highlight the rotor design process, based on contemporary methods of experiment-simulation integration approach and use of rapid manufacturing techniques. In-house wind tunnel measurements of a scaled model performance were executed. A numerical analysis using dedicated software (QBlade) was conducted in parallel. A comparison between the obtained results indicated that the chosen numerical tools are capable of providing a reliable output, even in complex, transitional flow conditions. Bearing in mind the above observations, QBlade was incorporated into the development process of a completely new blade geometry which would increase rotor performance. The selected design has indeed prove to show better power outcome in an additional experimental campaign.
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MERAD, Asmae BOUANANI, and Mama BOUCHAOUR. "MODELING AND SIMULATION OF THE VERTICAL AXIS WIND TURBINE BY QBLADE SOFTWARE." Algerian Journal of Renewable Energy and Sustainable Development 2, no. 02 (December 15, 2020): 181–88. http://dx.doi.org/10.46657/ajresd.2020.2.2.11.

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The use of wind energy has no harmful effects on the environment. This makes it a clean energy that is a real alternative to the problem of nuclear waste management and greenhouse gas emissions. Vertical axis wind turbines have prospective advantages in the field of domestic applications, because they have proven effectual in urban areas where wind flow conditions are intermittent, omnidirectional, unsteady and turbulent. The wind cannot ensure a regular energy supply without optimising the aerodynamics of the blades. This article presents a reminder about wind energy and wind turbines, especially the VAWT type wind turbines and also gives a presentation on the aerodynamic side of VAWT by studying the geometry and aerodynamic characteristics of the blade profiles with the acting forces and also the explanation of the DMS multiple flow tube model. This work also gives the different simulation methods to optimize the behaviour of the blades from the selected NACA profiles; the analysis first goes through the design of the blades by the design and simulation software Qblade which is used to calculate also the forces on the blade and the coefficients of lift, drag and fineness. At the end of this article we have the DMS simulation of the VAWT turbines, by determining the power coefficient and the power collected by the turbine to select the wind turbine adapted to a well characterized site.
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Simatupang, Reza, and Deddy Supriatna. "Designing a Tapperless Blade with an S-4320 Airfoil on a Micro-Scale Horizontal Axis Wind Turbine (Case Studies at PT Lentera Bumi Nusantara)." MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering 3, no. 1 (January 31, 2021): 27–34. http://dx.doi.org/10.46574/motivection.v3i1.81.

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This article aims to design a taperless blade in a micro-scale wind turbine in medium wind speed, a case study at PT Lentera Bumi Nusantara. The methodology used in this research is quantitative research methods. Based on the test results in calculating the data using Microsoft Excel software and the blade airfoil design simulation using Qblade software, the use of the S-4320 airfoil in the application of the taperless blade design has research results that show that the airfoil design of the blade produces mechanical power at moderate wind speeds. It can be concluded that this blade design shows that the taperless blade with S-4320 airfoil can be applied to medium wind speeds in micro-scale horizontal axis wind turbines. Artikel ini bertujuan untuk merancang bilah jenis taperless pada turbin angin skala mikro dalam kecepatan angin sedang, studi kasus pada PT Lentera Bumi Nusantara. Metodologi yang digunakan dalam penelitian ini adalah dengan metode penelitian kuantitatif. Berdasarkan hasil pengujian dalam perhitungan data menggunakan software Microsoft Excel dan simulasi perancangan desain airfoil bilah menggunakan software Qblade, penggunaan airfoil S-4320 dalam pengaplikasian desain bilah jenis taperless memiliki hasil penelitian yang menunjukan bahwa desain airfoil bilah tersebut menghasilkan tenaga mekanik pada kecepatan angin sedang. Dapat disimpulkan dalam desain bilah ini menunjukan bahwa bilah jenis taperless dengan airfoil S-4320 dapat diterapkan pada kecepatan angin sedang pada turbin angin sumbu horizontal skala mikro.
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Zahariea, D., D. E. Husaru, and C. M. Husaru. "Aerodynamic and structural analysis of a small-scale horizontal axis wind turbine using QBlade." IOP Conference Series: Materials Science and Engineering 595 (September 20, 2019): 012042. http://dx.doi.org/10.1088/1757-899x/595/1/012042.

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DWI SAPTO, AGUNG, and HINGGIL PANDU RUMAKSO. "UJI COBA PERFORMA BENTUK AIRFOIL MENGGUNAKAN SOFTWARE QBLADE TERHADAP TURBIN ANGIN TIPE SUMBU HORIZONTAL." Jurnal Teknik Mesin 10, no. 1 (March 14, 2021): 1. http://dx.doi.org/10.22441/jtm.v10i1.10212.

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Panjwani, Balram, Cecile Quinsard, Dominik Gacia Przemysław, and Jostein Furseth. "Virtual Modelling and Testing of the Single and Contra-Rotating Co-Axial Propeller." Drones 4, no. 3 (August 12, 2020): 42. http://dx.doi.org/10.3390/drones4030042.

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Propellers are a vital component to achieve successful and reliable operation of drones. However, the drone developer faces many challenges while selecting a propeller and a common approach is to perform static thrust measurement. However, the selection of a propeller using a static thrust measurement system is time-consuming. To overcome a need for the static thrust system a virtual model has been developed for measuring both the static and dynamic thrust of a single and coaxial propeller. The virtual model is reliable enough to minimize the need for full-scale tests. The virtual model has been built using two open-source software Qblade and OpenFoam. Qblade is employed to obtain the lift and drag coefficients of the propeller’s airfoil section. OpenFoam is utilized to perform the flow simulations of propellers and for obtaining the thrust and torque data of the propeller. The developed virtual model is validated with experimental data and the experimental data are obtained by developing a multi-force balance system for measuring thrusts and torques of a single and a pair of coaxial contra-rotating propellers. The data obtained from the propeller virtual model are compared with the measurement data. For a single propeller, the virtual model shows that the estimated forces are close to the experiment at lower rotational speeds. For coaxial propellers, there are some deviations at the rear propeller due to the turbulence and flow disturbance caused by the front propeller. However, the computed thrust data are still accurate enough to be used in selecting the propeller. The studies indicate that in the future, these virtual models will minimize a need for experimental testing.
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Husaru, D. E., P. D. Bârsănescu, and D. Zahariea. "Effect of yaw angle on the global performances of Horizontal Axis Wind Turbine - QBlade simulation." IOP Conference Series: Materials Science and Engineering 595 (September 20, 2019): 012047. http://dx.doi.org/10.1088/1757-899x/595/1/012047.

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Bianchini, Alessandro, David Marten, Andrea Tonini, Francesco Balduzzi, Christian Navid Nayeri, Giovanni Ferrara, and Christian Oliver Paschereit. "Implementation of the “Virtual Camber” Transformation into the Open Source Software QBlade: Validation and Assessment." Energy Procedia 148 (August 2018): 210–17. http://dx.doi.org/10.1016/j.egypro.2018.08.070.

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Bangga, Galih, Giorgia Guma, Thorsten Lutz, and Ewald Krämer. "Numerical simulations of a large offshore wind turbine exposed to turbulent inflow conditions." Wind Engineering 42, no. 2 (March 20, 2018): 88–96. http://dx.doi.org/10.1177/0309524x18756958.

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This work is intended to investigate the aerodynamic responses of a large generic 10-MW offshore wind turbine under turbulent inflow conditions. The nonlinear lifting line free vortex wake simulations approach is employed for this purpose, computed using the QBlade code. In these studies, the effects of a three-dimensional correction model for the airfoil polars were studied in advance. For this purpose, the blade element momentum computations employing the corrected polars are performed and compared to computational fluid dynamics simulations, and a good agreement is obtained between both employed approaches. Background turbulence is then imposed in the QLLT simulations with the turbulence intensities ranging from low to high turbulence levels (3%–15%). Furthermore, the impact of wind shear from different locations (offshore and onshore) is investigated in this work.
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Dissertations / Theses on the topic "QBlade"

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Marten, David [Verfasser], Christian Oliver [Akademischer Betreuer] Paschereit, Christian Oliver [Gutachter] Paschereit, Jens [Gutachter] Fortmann, and Athanasios [Gutachter] Barlas. "QBlade: a modern tool for the aeroelastic simulation of wind turbines / David Marten ; Gutachter: Christian Oliver Paschereit, Jens Fortmann, Athanasios Barlas ; Betreuer: Christian Oliver Paschereit." Berlin : Technische Universität Berlin, 2020. http://d-nb.info/1220774472/34.

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Junior, Joseph Youssif Saab. "Trailing-edge noise: development and application of a noise prediction tool for the assessment and design of wind turbine airfoils." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3150/tde-14032017-140101/.

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This report concerns the research, design, implementation and application of an airfoil trailing-edge noise prediction tool in the development of new, quieter airfoil for large-size wind turbine application. The tool is aimed at enabling comparative acoustic performance assessment of airfoils during the early development cycle of new blades and rotors for wind turbine applications. The ultimate goal is to enable the development of quieter wind turbines by the Wind Energy Industry. The task was accomplished by developing software that is simultaneously suitable for comparative design, computationally efficient and user-friendly. The tool was integrated into a state-of-the-art wind turbine design and analysis code that may be downloaded from the web, in compiled or source code form, under general public licensing, at no charge. During the development, an extensive review of the existing airfoil trailing-edge noise prediction models was accomplished, and the semi-empirical BPM model was selected and modified to cope with generic airfoil geometry. The intrinsic accuracy of the original noise prediction model was evaluated as well as its sensitivity to the turbulence length scale parameter, with restrictions imposed accordingly. The criterion allowed comparison of performance of both CFD-RANS and a hybrid solver (XFLR5) on the calculation of the turbulent boundary layer data, with the eventual adjustment and selection of the latter. After all the elements for assembling the method had been selected and the code specified, a collaboration project was made effective between Poli-USP and TU-Berlin, which allowed the seamless coupling of the new airfoil TE noise module, \"PNoise\", to the popular wind turbine design/analysis integrated environment, \"QBlade\". After implementation, the code calculation routines were thoroughly verified and then used in the development of a family of \"silent profiles\" with good relative acoustic and aerodynamic performance. The sample airfoil development study closed the initial design cycle of the new tool and illustrated its ability to fulfill the originally intended purpose of enabling the design of new, quieter blades and rotors for the advancement of the Wind Energy Industry with limited environmental footprint.
Este trabalho descreve a pesquisa de elementos iniciais, o projeto, a implantação e a aplicação de uma ferramenta de predição de ruído de bordo de fuga, no desenvolvimento de aerofólios mais silenciosos para turbinas eólicas de grande porte. O objetivo imediato da ferramenta é permitir a comparação de desempenho acústico relativo entre aerofólios no início do ciclo de projeto de novas pás e rotores de turbinas eólicas. O objetivo mais amplo é possibilitar o projeto de turbinas eólicas mais silenciosas, mas de desempenho aerodinâmico preservado, pela indústria da Energia Eólica. A consecução desses objetivos demandou o desenvolvimento de uma ferramenta que reunisse, simultaneamente, resolução comparativa, eficiência computacional e interface amigável, devido à natureza iterativa do projeto preliminar de um novo rotor. A ferramenta foi integrada a um ambiente avançado de projeto e análise de turbinas eólicas, de código aberto, que pode ser livremente baixado na Web. Durante a pesquisa foi realizada uma ampla revisão dos modelos existentes para predição de ruído de bordo de fuga, com a seleção do modelo semi-empírico BPM, que foi modificado para lidar com geometrias genéricas. A precisão intrínseca do modelo original foi avaliada, assim como sua sensibilidade ao parâmetro de escala de turbulência transversal, com restrições sendo impostas a esse parâmetro em decorrência da análise. Esse critério permitiu a comparação de resultados de cálculo provenientes de método CFD-RANS e de método híbrido (XFLR5) de solução da camada limite turbulenta, com a escolha do último. Após a seleção de todos os elementos do método e especificação do código, uma parceria foi estabelecida entre a Poli-USP e a TU-Berlin, que permitiu a adição de um novo módulo de ruído de bordo de fuga, denominado \"PNoise\", ao ambiente de projeto e análise integrado de turbinas eólicas \"QBlade\". Após a adição, as rotinas de cálculo foram criteriosamente verificadas e, em seguida, aplicadas ao desenvolvimento de aerofólios mais silenciosos, com bons resultados acústicos e aerodinâmicos relativos a uma geometria de referência. Esse desenvolvimento ilustrou a capacidade da ferramenta de cumprir a missão para a qual foi inicialmente projetada, qual seja, permitir à Indústria desenvolver pás mais silenciosas que irão colaborar com o avanço da energia eólica através da limitação do seu impacto ambiental.
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Jami, Valentina. "Development of Computer Program for Wind Resource Assessment, Rotor Design and Rotor Performance." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1513703072278665.

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Lennie, Matthew. "Development of the QFEM Solver : The Development of Modal Analysis Code for Wind Turbine Blades in QBLADE." Thesis, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-132154.

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The Wind Turbine industry continues to drive towards high market penetrationand profitability. In order to keep Wind Turbines in field for as long as possiblecomputational analysis tools are required. The open source tool QBlade[38] softwarewas extended to now contain routines to analyse the structural properties of WindTurbine blades. This was achieved using 2D integration methods and a Tapered Euler-Bernoulli beam element in order to find the mode shapes and 2D sectional properties.This was a key step towards integrating the National Renewable Energy LaboratoriesFAST package[32] which has the ability to analyse Aeroelastic Responses. The QFEMmodule performed well for the test cases including: hollow isotropic blade, rotatingbeam and tapered beam. Some improvements can be made to the torsion estimationof the 2D sections but this has no effect on the mode shapes required for the FASTsimulations.
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Correia, Luís Miguel Camacho. "Estudo Preliminar da Adaptação da Aeronave Crossover para Voo de Longa Duração a Grande Altitude." Master's thesis, 2018. http://hdl.handle.net/10400.6/8326.

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Esta dissertação para obtenção do grau de Mestre em Engenharia Aeronáutica descreve um projeto em parceria com a empresa Eurosport Aircraft para realizar um estudo de desempenho para alteração do moto-planador Crossover numa aeronave HALE UAV. O objetivo principal é de verificar a possibilidade de atingir uma autonomia de 168 h e atingir a altitude de 12160 m (40000 ft) realizando o aumento da envergadura da asa de 18 m para 25 m, com um MTOM de 1800 kg e colocando 2 motores Rotax® 915is turbo no Crossover. Para atingir os objetivos são utilizados vários programas de análise tal como o Xflr5, que permitiu obter a polar de arrasto do perfil e das asas utilizados nos casos de estudo; o Qblade e o Jblade, utilizados para obter o projeto e análise de desempenho das hélices utilizadas. Este estudo é realizado ao longo de diversas fases, onde na primeira fase é feito o dimensionamento das empenagens e a análise do desempenho do motor Rotax® 915is turbo. A fase seguinte envolve o projeto das hélices, sendo estas otimizadas com recurso ao Qblade e, por fim, são realizadas análises do desempenho das hélices em Jblade para vários ângulos de incidência para obter uma função de hélice de passo variável. Durante a terceira fase é estudada e analisada a polar de arrasto da aeronave com as diversas configurações para o painel novo da asa proposto pela empresa. Para verificar qual a melhor configuração para atingir o objetivo, são realizados diversos estudos de desempenho conceptual onde são testadas diversas hélices. Depois de uma análise detalhada é escolhida a hélice mais eficiente para as condições de voo e posteriormente é realizado o mesmo estudo para analisar/testar qual a configuração de asa mais adequada. Por fim, é realizado um estudo de desempenho com integração no tempo onde são comparados dois tipos de perfis de missão, o primeiro realizando um voo de cruzeiro normal a 12160 m e no segundo um perfil com funcionamento dos motores intermitente, realizando voo planado até uma determinada altitude mínima seguido com voo de subida até 12160 m, repetindo este processo até alcançar o peso de combustível mínimo.
This dissertation for the master’s degree in Aeronautical Engineering describes a project in partnership with the company Eurosport Aircraft with the objective of developing a performance study for a modification of the motor glider Crossover into a HALE UAV. The main objective is to verify that if increasing the wingspan of 18 m to 25 m, inserting two Rotax® 915is turbo and having a MTOM of 1800 kg on the Crossover, if it is possible to have 168 h of endurance and reach an altitude of 12160 m (40000 ft). To reach the objectives it is used various analysis programs, such as XFLR5, used to obtain the drag polar of the aerofoils and wings used on the case studies; Qblade and Jblade are used to design and obtain the performance of the propellers tested in this work. This study is carried out over several phases, where in the first phase the dimensioning of the tailings and the performance analysis of the Rotax® 915is turbo engine are done. The next phase involves the design of the propellers, these being optimized using Qblade and, finally, the analyses of the performance of the propellers on Jblade performing it for various blade pitch angle to obtain a variable pitch propeller function. During the third phase, the aircraft's drag polar was studied and analysed with the various configurations of the new panel of the wing proposed by the company. To verify the best configuration to reach the objective, several conceptual performance studies are made where several propellers designs are tested. After a detailed analysis, the most efficient propeller for the flight conditions is chosen and the same study is then carried out to analyse/test the most appropriate wing configuration. Finally, a time-integrated performance study comparing two types of mission profiles is carried out, the first one performing a normal cruise flight at 12160 m and the second one shows a profile with an intermittent engine functioning, performing a glided flight to a certain minimum altitude followed by a climb to 12160 m, repeating this process until reaching the minimum fuel weight.
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Book chapters on the topic "QBlade"

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Reddy, Kanthala Uma, Bachu Deb, and Bidesh Roy. "Analysis of the Aerodynamic Characteristics of NREL S823 and DU 06-W-200 Airfoils at Various Reynolds Numbers Using QBlade." In Lecture Notes in Mechanical Engineering, 279–86. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8304-9_20.

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Brahimi, Tayeb, and Ion Paraschivoiu. "Aerodynamic Analysis and Performance Prediction of VAWT and HAWT Using CARDAAV and Qblade Computer Codes." In Entropy and Exergy in Renewable Energy [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96343.

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Wind energy researchers have recently invited the scientific community to tackle three significant wind energy challenges to transform wind power into one of the more substantial, low-cost energy sources. The first challenge is to understand the physics behind wind energy resources better. The second challenge is to study and investigate the aerodynamics, structural, and dynamics of large-scale wind turbine machines. The third challenge is to enhance grid integration, network stability, and optimization. This chapter book attempts to tackle the second challenge by detailing the physics and mathematical modeling of wind turbine aerodynamic loads and the performance of horizontal and vertical axis wind turbines (HAWT & VAWT). This work underlines success in the development of the aerodynamic codes CARDAAV and Qbalde, with a focus on Blade Element Method (BEM) for studying the aerodynamic of wind turbines rotor blades, calculating the induced velocity fields, the aerodynamic normal and tangential forces, and the generated power as a function of a tip speed ration including dynamic stall and atmospheric turbulence. The codes have been successfully applied in HAWT and VAWT machines, and results show good agreement compared to experimental data. The strength of the BEM modeling lies in its simplicity and ability to include secondary effects and dynamic stall phenomena and require less computer time than vortex or CFD models. More work is now needed for the simulation of wind farms, the influence of the wake, the atmospheric wind flow, the structure and dynamics of large-scale machines, and the enhancement of energy capture, control, stability, optimization, and reliability.
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Conference papers on the topic "QBlade"

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Marten, David, Juliane Wendler, Georgios Pechlivanoglou, Christian Navid Nayeri, and Christian Oliver Paschereit. "Development and Application of a Simulation Tool for Vertical and Horizontal Axis Wind Turbines." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-94979.

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A double-multiple-streamtube vertical axis wind turbine simulation and design module has been integrated within the open-source wind turbine simulator QBlade. QBlade also contains the XFOIL airfoil analysis functionalities, which makes the software a single tool that comprises all functionality needed for the design and simulation of vertical or horizontal axis wind turbines. The functionality includes two dimensional airfoil design and analysis, lift and drag polar extrapolation, rotor blade design and wind turbine performance simulation. The QBlade software also inherits a generator module, pitch and rotational speed controllers, geometry export functionality and the simulation of rotor characteristics maps. Besides that, QBlade serves as a tool to compare different blade designs and their performance and to thoroughly investigate the distribution of all relevant variables along the rotor in an included post processor. The benefits of this code will be illustrated with two different case studies. The first case deals with the effect of stall delaying vortex generators on a vertical axis wind turbine rotor. The second case outlines the impact of helical blades and blade number on the time varying loads of a vertical axis wind turbine.
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Lennie, Matthew, David Marten, George Pechlivanoglou, Christian Oliver Paschereit, and Sean Dominin. "Simulating Wind Turbine Ice Throw: QBlade and Statistical Analysis." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-76485.

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Ice throw and fall analysis using a semi-empirical Monte Carlo approach seems to be a good trade off between empirical formulation and complex full physics simulations. This paper looks at some of the challenges of running these simulations particularly at the uncertainty of certain input data. The field testing so far has helped provide data on a few of the key properties of the ice chunks. However, the output probability fields still suffer from a relatively high level of uncertainty due to the difficulty in collecting large sample sizes. A convergence study was able to establish that 60000 particle samples appear to be enough to converge the output probability field for the number of input variables selected. In a demonstration case using the new QBlade ice module, it was possible to demonstrate that it may be possible to avoid heating the inner sections of the wind turbine blades without increasing the risk compared to a standstill wind turbine.
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Lennie, Matthew, David Marten, Georgios Pechlivanoglou, Christian Navid Nayeri, and Christian Oliver Paschereit. "Development and Validation of a Modal Analysis Code for Wind Turbine Blades." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-27151.

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QBlade is an open source wind turbine design and simulation tool developed at the Berlin Institute of Technology. To enable a coupling with the aeroelastic simulation tool FAST from NREL an aditional module, called QFEM, was created and integrated with QBlade. This module performs a modal analysis on rotor blades designed in QBlade using isotropic tapered Euler Beam elements. The newly developed module now provides structural properties to the National Renewable Energy Laboratorys aeroelasticity simulation tool FAST. The 2D structural properties of the beam elements are created using integration methods. A number of test cases show that the 2D integration methods and beam element code work with adaquete accuracy. The integration of the modal analysis code greatly facilitates the structural design and analysis of rotor blades and will be made available to the public under an open source license.
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Lennie, Matthew, Sean Dominin, David Marten, George Pechlivanoglou, and Christian O. Paschereit. "Development of Ice Throw Model for Wind Turbine Simulation Software QBlade." In AIAA Scitech 2019 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2019. http://dx.doi.org/10.2514/6.2019-1800.

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Koc, Emre, Onur Gunel, and Tahir Yavuz. "Comparison of Qblade and CFD results for small-scaled horizontal axis wind turbine analysis." In 2016 IEEE International Conference on Renewable Energy Research and Applications (ICRERA). IEEE, 2016. http://dx.doi.org/10.1109/icrera.2016.7884538.

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Marten, David, Matthew Lennie, George Pechlivanoglou, Christian Oliver Paschereit, Alessandro Bianchini, Giovanni Ferrara, and Lorenzo Ferrari. "Benchmark of a Novel Aero-Elastic Simulation Code for Small Scale VAWT Analysis." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-75922.

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After almost 20 years of absence from research agendas, interest in the vertical axis wind turbine (VAWT) technology is presently increasing again, after the research stalled in the mid 90’s in favour of horizontal axis turbines (HAWTs). However, due to the lack of research in past years, there are a significantly lower number of design and certification tools available, many of which are underdeveloped if compared to the corresponding tools for HAWTs. To partially fulfil this gap, a structural FEA model, based on the Open Source multi-physics library PROJECT::CHRONO, was recently integrated with the Lifting Line Free Vortex Wake method inside the Open Source wind turbine simulation code QBlade and validated against numerical and experimental data of the SANDIA 34m rotor. In this work some details about the newly implemented nonlinear structural model and its coupling to the aerodynamic solver are first given. Then, in a continuous effort to assess its accuracy, the code capabilities were here tested on a small scale, fast-spinning (up to 450 rpm) VAWT. The study turbine is a helix shaped, 1kW Darrieus turbine, for which other numerical analyses were available from a previous study, including the results coming from both a 1D beam element model and a more sophisticated shell element model. The resulting data represented an excellent basis for comparison and validation of the new aero-elastic coupling in QBlade. Based on the structural and aerodynamic data of the study turbine, an aero-elastic model was then constructed. A purely aerodynamic comparison to experimental data and a BEM simulation represented the benchmark for QBlade aerodynamic performance. Then, a purely structural analysis was carried out and compared to the numerical results from the former. After the code validation, an aero-elastically coupled simulation of a rotor self-start has been performed to demonstrate the capabilities of the newly developed model to predict the highly nonlinear transient aerodynamic and structural rotor response.
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Marten, David, Matthew Lennie, Georgios Pechlivanoglou, Christian Navid Nayeri, and Christian Oliver Paschereit. "Implementation, Optimization and Validation of a Nonlinear Lifting Line Free Vortex Wake Module Within the Wind Turbine Simulation Code QBlade." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-43265.

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The development of the next generation of large multi-megawatt wind turbines presents exceptional challenges to the applied aerodynamic design tools. Because their operation is often outside the validated range of current state of the art momentum balance models, there is a demand for more sophisticated, but still computationally efficient simulation methods. In contrast to the Blade Element Momentum Method (BEM) the Lifting Line Theory (LLT) models the wake explicitly by a shedding of vortex rings. The wake model of freely convecting vortex rings induces a time-accurate velocity field, as opposed to the annular averaged induction that is computed from the momentum balance, with computational costs being magnitudes smaller than those of a full CFD simulation. The open source code QBlade, developed at the Berlin Institute of Technology, was recently extended with a Lifting Line - Free Vortex Wake algorithm. The main motivation for the implementation of a LLT algorithm into QBlade is to replace the unsteady BEM code AeroDyn in the coupling to FAST to achieve a more accurate representation of the unsteady aerodynamics and to gain more information on the evolving rotor wake and flow-field structure. Therefore, optimization for computational efficiency was a priority during the integration and the provisions that were taken will be presented in short. The implemented LLT algorithm is thoroughly validated against other benchmark BEM, LLT and panel method codes and experimental data from the MEXICO and NREL Phase VI tests campaigns. By integration of a validated LLT code within QBlade and its database, the setup and simulation of LLT simulations is greatly facilitated. Simulations can be run from already existing rotor models without any additional input. Example use cases envisaged for the LLT code include; providing an estimate of the error margin of lower fidelity codes i.e. unsteady BEM, or providing a baseline solution to check the soundness of higher fidelity CFD simulations or experimental results.
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Wendler, Juliane, David Marten, George Pechlivanoglou, Christian Navid Nayeri, and Christian Oliver Paschereit. "An Unsteady Aerodynamics Model for Lifting Line Free Vortex Wake Simulations of HAWT and VAWT in QBlade." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-57184.

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This paper describes the introduction of an unsteady aerodynamics model applicable for horizontal and vertical axis wind turbines (HAWT/VAWT) into the advanced blade design and simulation code QBlade, developed at the HFI of the TU Berlin. The software contains a module based on lifting line theory including a free vortex wake algorithm (LLFVW) which has recently been coupled to the structural solver of FAST to allow for time-resolved aeroelastic simulations of large, flexible wind turbine blades. The aerodynamic model yields an accuracy improvement with respect to Blade Element Momentum (BEM) theory and a more practical approach compared to higher fidelity methods such as Computational Fluid Dynamics (CFD) which are too computationally demanding for load case calculations. To capture the dynamics of flow separation, a semi-empirical method based on the Beddoes-Leishman model now extends the simple table lookups of static polar data by predicting the unsteady lift and drag coefficients from steady data and the current state of motion. The model modifications for wind turbines and the coupling to QBlade’s vortex method are described. A 2D validation of the implementation is presented in this paper to demonstrate the capability and reliability of the resulting simulation scheme. The applicability of the model is shown for exemplary HAWT and VAWT test cases. The modelling of the dynamic stall vortex, the empiric model constants as well as the influence of the dynamic coefficients on performance predictions are investigated.
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Islam, Md Robiul, Labid Bin Bashar, and Nazmus Sowad Rafi. "Design and Simulation of A Small Wind Turbine Blade with Qblade and Validation with MATLAB." In 2019 4th International Conference on Electrical Information and Communication Technology (EICT). IEEE, 2019. http://dx.doi.org/10.1109/eict48899.2019.9068762.

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Bartholomay, Sirko, David Marten, Mariano Sánchez Martínez, Jörg Alber, George Pechlivanoglou, Christian Navid Nayeri, Christian Oliver Paschereit, Annette Claudia Klein, Thorsten Lutz, and Ewald Krämer. "Cross-Talk Compensation for Blade Root Flap- and Edgewise Moments on an Experimental Research Wind Turbine and Comparison to Numerical Results." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-76977.

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In the current paper a method to correct cross-talk effects for strain-gauge measurements is presented. The method is demonstrated on an experimental horizontal axis wind turbine. The procedure takes cross-moments (flap-wise on edgewise moments and vice versa) as well as axial acceleration into account. The results from the experimental setup are compared to numerical URANS calculations and the medium-fidelity code Qblade for a baseline case and two yawed inflow situations.
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