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Degree

Master of Sciences, Case Western Reserve University, Materials Science and Engineering, 2011.

Abstract

Wind turbines operating in off-shore environments are challenged with icing conditions in cold temperature regions. Ice, in different forms, impacts the turbine material and gets accreted to the surface of the material, and eventually decreases the efficiency of the turbine by affecting the aerodynamics of rotating blades. A new experimental method was developed based on the ASTM standard D 3528-96 to measure the adhesion strength between ice and surfaces of 304 stainless steel, epoxy polyamide primer coated and polyurethane top coated fiberglass materials. With decreasing temperature from -10 °C to -20 °C, the adhesion strength of ice/material interface increased from 0.77 MPa to 1.42 MPa for 304 stainless steel; 0.34 MPa to 0.59 MPa for epoxy primer coat; and from 0.29 MPa to 0.47 MPa for polyurethane top coat surface. The fracture behavior of the ice/material interface with respect to temperature was found to adhesive in all cases except for stainless steel at -20 °C, which was found to be a combination of adhesive and cohesive fracture.

Subject Headings

Materials science

Keywords

Ice; Adhesion Strength; Temperature; Wind Turbine

Committee / Advisors

David Matthiesen, Professor (Advisor)
Gary Michal, Professor (Committee Member)
John Lewandowski, Professor (Committee Member)

Pages

92p.

Document number: case1283536362
Permalink: http://rave.ohiolink.edu/etdc/view?acc_num=case1283536362

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