2011fall-T2-WingletsforWindTurbineRotorBlades

2011fall-T2-WingletsforWindTurbineRotorBlades - EML 4905...

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EML 4905 SENIOR DESIGN PROJECT A B.S. THESIS PREPARED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF BACHELOR OF SCIENCE IN MECHANICAL ENGINEERING Design Optimization of Winglets for Wind Turbine Rotor Blades 100% Report Rinaldo Gonzalez Galdamez Diego Moreno Ferguson Juancarlo Rodriguez Gutierrez Advisor: Professor George Dulikravich Professor Igor Tsukanov November 18, 2011 This B.S. thesis is written in partial fulfillment of the requirements in EML 4905. The contents represent the opinion of the authors and not the Department of Mechanical and Materials Engineering.
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Design Optimization of Winglets for Wind Turbine Rotor Blades R.G. Galdamez, D. Moreno, J. Rodriguez Page | 2 Ethics Statement and Signatures The work submitted in this B.S. thesis is solely prepared by a team consisting of RINALDO GONZALEZ GALDAMEZ, DIEGO MORENO FERGUSON, and JUANCARLO RODRIGUEZ GUTIERREZ and it is original. Excerpts from others’ work have been clearly identified, their work acknowledged within the text and listed in the list of references. All of the engineering drawings, computer programs, formulations, design work, prototype development and testing reported in this document are also original and prepared by the same team of students. Rinaldo Gonzalez Galdamez Diego Moreno Ferguson Juancarlo Rodriguez Gutierrez Team Member Team Member Team Member Dr. George Dulikravich Dr. Igor Tsukanov Faculty Advisor Faculty Advisor
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Design Optimization of Winglets for Wind Turbine Rotor Blades R.G. Galdamez, D. Moreno, J. Rodriguez Page | 3 Table of Contents 1 Introduction . .......................................................................................................................... 10 1.1 Problem Statement . ........................................................................................................ 10 1.2 Motivation . ..................................................................................................................... 11 1.3 Literature Survey . ........................................................................................................... 11 1.3.1 Introduction to Wind Turbines. ............................................................................... 11 1.3.2 Modern Wind Turbine Design . ............................................................................... 16 1.3.3 Wind turbine aerodynamics . ................................................................................... 19 1.3.4 Wind turbine loads and structure . ........................................................................... 37 2 Conceptual design . ................................................................................................................ 44 2.1 Winglet design. ............................................................................................................... 44 2.2 Airfoils and blade geometry . .......................................................................................... 46 3 Design components . .............................................................................................................. 49 3.1 Theoretical Design . ........................................................................................................ 50 3.1.1 Blade pitch angle. .................................................................................................... 50 3.1.2 Blade twist angle . .................................................................................................... 50 3.1.3 Chord distribution . .................................................................................................. 50 3.2 Proposed Initial Design . ................................................................................................. 50 4 Final Design . ......................................................................................................................... 62 4.1 Blade Design with Winglet . ........................................................................................... 62 4.1.1 Sizing and parameters . ............................................................................................ 62 4.2 Parameterization of Design . ........................................................................................... 62 4.2.1 Cant angle . .............................................................................................................. 62 4.2.2 Radius (Percentage of Height) . ............................................................................... 63 4.2.3 Height . ..................................................................................................................... 63 4.2.4 Randomization of Geometries . ............................................................................... 63 4.3 Final CAD design . .......................................................................................................... 64 5 CFD simulations . .................................................................................................................. 67 5.1 CFD modeling and setup in ANSYS Fluent . ................................................................. 67 5.1.1 Pre-processing . ........................................................................................................ 67 5.1.2 Domain decomposition . .......................................................................................... 68 5.1.3 Boundary conditions . .............................................................................................. 70 5.1.4 Turbulence modeling . ............................................................................................. 72 5.1.5 Results of CFD simulations . ................................................................................... 73 6 Timeline and Team Responsibilities . .................................................................................... 74 7 Prototype, Testing and Cost Analysis . .................................................................................. 76 7.1 Wind tunnel testing . ....................................................................................................... 76 7.1.1 Calculation of parameters and scaling for wind tunnel testing . .............................. 78 7.2 Cost of Prototype and Testing . ....................................................................................... 79
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Design Optimization of Winglets for Wind Turbine Rotor Blades R.G. Galdamez, D. Moreno, J. Rodriguez Page | 4 7.3 Materials . ........................................................................................................................ 80 7.4 Prototype Design . ........................................................................................................... 82 7.5 FEA study for prototype prior to wind tunnel testing . ................................................... 88 7.5.1 Results for prototype without winglet. .................................................................... 88 7.5.2 Results for prototype with winglet . ......................................................................... 91 8 Conclusions . .......................................................................................................................... 93 References . .................................................................................................................................... 94 Appendix A: Technical Drawings for Wind Turbine . .................................................................. 96 Appendix B: Vestas V39 Technical specifications . ...................................................................... 97 Appendix C: Material and Supplies quotes .
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2011fall-T2-WingletsforWindTurbineRotorBlades - EML 4905...

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