The purpose of this thesis is to design and manufacture a helical urban wind turbine with nominal power of 7.5 KW. Studying the wind energy and estimating its potential in Esfahan Province stations shows that the utilization 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 it imposes less vibration to installation location in comparison with horizontal axis turbines. As a result it could be 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 type of asymmetric reformatted airfoils, of symmetric airfoil's family (NACA) and optimized then. The optimized dimensions of the turbine was determined as the turbine rotor height, 5m, rotor diameter, 3m, and the airfoil chord length, 20cm. Subsequently, the wind turbine was simulated using Fluent and ANSYS CFX software with the dimensions achieved in optimizing dimensions step. After various meshing in 3 different speeds, it was processed to determine the optimized power, torque and rotating speed. The results of processing turbine in the above-mentioned software were compared to outcomes from coding the turbine in MATLAB program (using inventive 3D model of flow in single tube), as well as results of experiments done on the foreign type which revealed that the theoretical results are in acceptable conformity to experimental results. With respect to forces resulting from software processing and primary design of turbine, the main parts such as blades, turbine shaft, holding plates, turbine mast and other pieces was processed by ANSYS and CATIA software. Concerning the technology available in the industry, following the completion of part designing procedure and after preparing the manufacturing drafts and selecting the required basic materials, the appropriate manufacturing method was suggested for each part. Holding and controlling plates were made using casting cast iron with polystyrene model, then turning and milling was done for the part. The turbine blade’s die with 1m length and the main die for blade with 6m length were made using casting aluminum and composite material respectively. Also the Teflon material was used to manufacture the die for holding plates of 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 weight of blades and holding plates, carbon fiber composite, fiber glass and PVC foam that has high strength was used. Due to this fact that holding plates of turbine blade have less effect on operation of system in compared with blade itself, holding plates were made from fiber glass. Key Words Helical Urban Wind Turbine, Darrieus Wind Turbine, Quiet Revolution (QR5) Wind Turbine
