Measurement of Air Temperature using Thermochromic Liquid Crystal Technology
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Publisher:The Ohio State University
Series/Report no.:The Ohio State University. Department of Mechanical and Aerospace Engineering Undergraduate Research Theses; 2015
Thermochromic Liquid Crystals (TLCs) are commonly used for heat transfer measurement experiments, since TLCs react to changes in temperature by changing color, which can be recorded by a standard visual-light camera. This research will explore a novel use of TLCs by applying them to a thin filament to measure air temperature changing. Traditional methods for measuring fluid temperature, such as miniature thermocouples, can only determine the temperature at a single point or a small array of points and are not able to provide a profile of the whole cross section. Because it only requires a standard visual-light camera to record the color change and determine the temperature, this method is easily integrated with the rotating experiments that are required for determining the flow behavior in jet engines and other complicated flow geometries. The purpose of this project is to build a TLC thermal model on filaments to measure and map the air temperature change in the test section of a blowdown wind tunnel. This study can help to provide a method for measuring the fluid temperature profile across a full passage of a wind tunnel, providing more accurate and detailed boundary conditions for experiments.
Academic Major: Mechanical Engineering
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