Turbine Blade Fall - ME 452 Machine Design II Project 1 Fall 2011(This project is to be completed by each student individually Deliverable Due

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ME 452: Machine Design II Project 1 - Fall 2011 (This project is to be completed by each student individually.) Deliverable Due: Friday September 9, 2011, in class Report Due: Friday, October 14, 2011, 4:30 pm, ME 2172 Background and Problem Statement Wind turbines are becoming increasingly popular devices for converting wind energy into electricity. The concept is to mount airfoil shapes onto a rotor such that as the wind blows over the airfoils, the shaft is urged to turn. The shaft speed is usually much slower than is needed for efficient electricity generation, so a gear box is used to increase the speed between the turbine blades and the generator. In addition to these basic components, most wind turbine generators also include a means for feathering the airfoils in high winds to keep them from spinning too fast, and means for pointing the airfoils in the most advantageous direction (usually into the wind). Figure 1 below shows a typical conceptual layout of one design for a wind turbine generation system. Wikipedia has a good discussion of wind turbines. In particular two pages are suggested: http://en.wikipedia.org/wiki/Wind_turbine http://en.wikipedia.org/wiki/Wind_turbine_design Figure 1: Conceptual Layout of a Wind Turbine Electric Generator System Tower Generator Gear-box Three Equally-Spaced Turbine blades Tail rudder – points the blades into the wind Hub
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Your two projects this semester will focus on different aspects of the design of a relatively low-power (residential) wind turbine system. In the second project, you will design the gearbox and possibly other features of the system. Your task in this project is to design the end of the turbine blade where it fastens to the hub shown above . Wind Turbine Blade Design Figure 2 shows a typical blade design for a very large-scale wind turbine. The blades are formed to optimum aerodynamic shapes and are fastened to the hub by the round flange shown on the left end of the blades below. The design you will analyze will be similar in geometry, but much smaller. Figure 3 below shows a sketch of the flange. Figure 2:
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Turbine Blade Fall - ME 452 Machine Design II Project 1 Fall 2011(This project is to be completed by each student individually Deliverable Due

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