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چكيده انگليسي :

Designing and Manufacturing of a Helical Urban Wind Turbine Yaser Mehranfar Turbodesign iut@gmail com Date of Submission March 5 2012 Department of Mechanical Engineering Isfahan University of Technology 84156 83111 IranDegree M Sc Language FarsiSupervisor S Ziaie Prof szrad@cc iut ac irSupervisor E Shirani Prof eshirani@cc iut ac irAbstract The purpose of this thesis is to design and manufacture a helical urban wind turbine with nominal powerof 7 5 KW Studying the wind energy and estimating its potential in Esfahan Province stations shows that theutilization of wind energy using of this kind of urban turbine can have a considerable position in country Iran This turbine is a vertical axis wind one so that its operation is free from fluid flow direction also itimposes less vibration to installation location in comparison with horizontal axis turbines As a result it couldbe a suitable choice for using on buildings roads and farmlands In order to design and manufacture the blades cross sections of the turbine were selected from the typeof asymmetric reformatted airfoils of symmetric airfoil s family NACA and optimized then The optimizeddimensions of the turbine was determined as the turbine rotor height 5m rotor diameter 3m and the airfoilchord length 20cm Subsequently the wind turbine was simulated using Fluent and ANSYS CFX softwarewith the dimensions achieved in optimizing dimensions step After various meshing in 3 different speeds itwas processed to determine the optimized power torque and rotating speed The results of processing turbine in the above mentioned software were compared to outcomes fromcoding the turbine in MATLAB program using inventive 3D model of flow in single tube as well as resultsof experiments done on the foreign type which revealed that the theoretical results are in acceptableconformity to experimental results With respect to forces resulting from software processing and primarydesign of turbine the main parts such as blades turbine shaft holding plates turbine mast and other pieceswas processed by ANSYS and CATIA software Concerning the technology available in the industry following the completion of part designingprocedure and after preparing the manufacturing drafts and selecting the required basic materials theappropriate manufacturing method was suggested for each part Holding and controlling plates were madeusing casting cast iron with polystyrene model then turning and milling was done for the part The turbineblade s die with 1m length and the main die for blade with 6m length were made using casting aluminum andcomposite material respectively Also the Teflon material was used to manufacture the die for holding platesof turbine blade which is made using CNC milling as well One of the main factors affecting the turbine operation is the its weight so in order to reduce the weightof blades and holding plates carbon fiber composite fiber glass and PVC foam that has high strength wasused Due to this fact that holding plates of turbine blade have less effect on operation of system in comparedwith blade itself holding plates were made from fiber glass Key WordsHelical Urban Wind Turbine Darrieus Wind Turbine Quiet Revolution QR5 WindTurbine

مهران فر، ياسر

طراحي و ساخت توربين بادي مارپيچي شهري

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