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The optimal blade configuration is obtained using an in-house WOMBAT design code that integrates an advanced optimization method with a Blade Element-Momentum (BE-M) performance prediction framework. After slight geometric corrections for manufacturability, the resulting blade shows a consistent improvement in aerodynamic performance compared with the baseline architecture.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/optimal-spanwise-chord-and-thickness-distribution-for-a-troposkien-darrieus-wind-turbine/640042/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/optimal-spanwise-chord-and-thickness-distribution-for-a-troposkien-darrieus-wind-turbine/640042.png","ImageObject",300,407,{"name":92,"@type":93},"Elsa","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-22",true,{"@type":102,"interactionType":103,"userInteractionCount":24},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What blade design idea is proposed for the Troposkien Darrieus turbine?","Question",{"text":112,"@type":113},"The proposed blade uses variable chord and variable thickness distributions along the blade span to improve aerodynamic performance.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How is the optimal blade configuration determined?",{"text":117,"@type":113},"It is determined with the WOMBAT in-house design code that couples an optimization method with a Blade Element-Momentum (BE-M) performance prediction.",{"name":119,"@type":110,"acceptedAnswer":120},"Why is obtaining airfoil lift and drag data considered critical?",{"text":121,"@type":113},"The method needs extended lift/drag databases over a wide angle-of-attack range and appropriate Reynolds numbers; this makes the selection of reliable data the most critical input.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},640042,1792707190,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":24,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":44,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":129,"read_time":143},137455077381,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","J. Wind Eng. Ind. Aerodyn. 125 (2014) 13–21  \nContents lists available at ScienceDirect  \nJournal of Wind Engineering  \nand Industrial Aerodynamics journal [homepage:](homepage: www.elsevier.com/locate/jweia)[ www.elsevier.com/locate/jweia](homepage: www.elsevier.com/locate/jweia)  \n| Optimal spanwise chord and thickness distribution for a Troposkien Darrieus wind turbine |  |  | |\n| --- | --- | --- | --- |\n| Gabriele Bedon a, Marco Raciti Castellib, Ernesto Beninib,n\u003Cbr>a University of Padua, Via Venezia 1, 35131 Padua, Italy\u003Cbr>b Department of Industrial Engineering, University of Padua, Via Venezia 1, 35131 Padua, Italy |  |  |  |\n| a r t i c l e i n f o |  | a b s t r a c t |  |\n| Article history:\u003Cbr>Received 8 August 2013\u003Cbr>Received in revised form\u003Cbr>27 October 2013\u003Cbr>Accepted 3 December 2013\u003Cbr>Available online 27 December 2013 |  | An innovative concept of Troposkien wind turbine blade, characterized by a variable chord and thickness distributions along the blade span, is here presented. The proposed optimal blade configuration is determined through the use of an in-house design code, the so-called WOMBAT algorithm, obtained by combining both an advanced optimization method and a Blade Element-Momentum (BE-M) performance prediction code. The resulting geometry, slightly corrected in order to be easily realizable, shows a consistent increase in the aerodynamic performance with respect to the considered baseline architecture.\u003Cbr>& 2013 Elsevier Ltd. All rights reserved. |  |\n| Keywords:\u003Cbr>Vertical-axis wind turbine\u003Cbr>Blade element-momentum theory Extended airfoil database\u003Cbr>Evolutionary algorithm\u003Cbr>Numerical optimization\u003Cbr>WOMBAT |  |  |  |\n\n1. Introduction  \nVertical-axis wind turbine (VAWT) design methods are widely discussed in the literature: in fact, the complexity of the air flow around vertical blades as well as the resulting dynamic effects on the rotor have stimulated researchers to develop several approaches with the aim of estimating the behavior and the performance of this particular turbine. The design is mainly conducted by adopting Blade Element-Momentum (BE-M) based algorithms and successively validated by means of Computational Fluid Dynamics (CFD) codes.  \nBE-M based algorithms have been developed by several authors with the aim of predicting the aerodynamic performance of vertical-axis rotors without demanding a high computational effort (Glauert, 1935; Templin, 1974; Strickland, 1975; Read and Sharpe, 1980 ; Paraschivoiu, 1981, 1983). The best results derive from the Multiple-Streamtube Double Disk Theory, obtained by combining the Strickland's Multiple-Streamtube model (Strickland, 1975), which provides more accurate previsions than the original SingleStreamtube model developed by Templin (1974), with the Double Disk approach that considers the freestream velocity reduction passing from the upwind to the downwind portion of rotor blade  \nn Corresponding author.  \nE-mail addresses: [gabriele.bedon@dii.unipd.it](gabriele.bedon@dii.unipd.it) (G. Bedon),  \nmarco.raciticastelli@unipd.it (M. Raciti Castelli), [ernesto.benini@unipd.it](ernesto.benini@unipd.it) (E. Benini) .  \nrevolution (Paraschivoiu, 1983; McCoy and Loth, 1981; Loth and McCoy, 1983; Paraschivoiu, 2002). In fact, the interaction between air and rotor is different for the downwind zone with respect to the upwind one: two separate computations are therefore to be performed. Limiting his research to a small Darrieus wind turbine (2 m high), Paraschivoiu (2002) proved the agreement of the Darrieus Turbine program (DART), based on the Strickland algorithm, with both experimental field data and wind tunnel measurements conducted by Sheldahl (1981).  \nThe Multiple-Streamtube Double Disk numerical code requires some preliminary knowledge on the main functional parameters of the rotor, in particular:  \n􀀁 operating conditions: wind speed, angular velocity, windshear, etc.;  \n􀀁 geometrical characteristics of the rotor: height, radius, etc. ;  \n􀀁 l","cbCaisIIzkLE8swh","https://ap.wps.com/l/cbCaisIIzkLE8swh","pdf",2505423,"English","# Introduction\n## Design approaches for VAWTs\n## BE-M algorithms and validation via CFD\n## Multiple-Streamtube Double Disk Theory\n## Role of airfoil lift/drag databases","[{\"question\":\"What blade design idea is proposed for the Troposkien Darrieus turbine?\",\"answer\":\"The proposed blade uses variable chord and variable thickness distributions along the blade span to improve aerodynamic performance.\"},{\"question\":\"How is the optimal blade configuration determined?\",\"answer\":\"It is determined with the WOMBAT in-house design code that couples an optimization method with a Blade Element-Momentum (BE-M) performance prediction.\"},{\"question\":\"Why is obtaining airfoil lift and drag data considered critical?\",\"answer\":\"The method needs extended lift/drag databases over a wide angle-of-attack range and appropriate Reynolds numbers; this makes the selection of reliable data the most critical input.\"}]","Optimal spanwise chord and thickness distribution for a Troposkien Darrieus wind turbine | PDF",23]