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http://dx.doi.org/10.3795/KSME-B.2013.37.12.1147

Effect of Insulation Coating on Start Time of Linear Region for Transient Hot-wire Method  

Lee, Seung-Hyun (School of Mechanical and Aerospace Engineering, Korea Aerospace Univ.)
Kim, Hyun Jin (School of Mechanical and Aerospace Engineering, Korea Aerospace Univ.)
Kim, Kyu Han (School of Mechanical and Aerospace Engineering, Korea Aerospace Univ.)
Park, Yong-Jun (School of Mechanical and Aerospace Engineering, Korea Aerospace Univ.)
Jang, Seok Pil (School of Mechanical and Aerospace Engineering, Korea Aerospace Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.37, no.12, 2013 , pp. 1147-1152 More about this Journal
Abstract
In this study, the effect of an insulation coating on the start time of a linear region is theoretically investigated when an insulation-coated hot-wire is used for the transient hot-wire method (THWM). For this purpose, important parameters affecting the start time of the linear region are presented from an analytical solution of temperature-rise for an insulation-coated hot-wire. Furthermore, a critical time to ignore the influence of important parameters is studied. The theoretical results indicate that the effect of the insulation coating rapidly disappears with a decrease in the wire radius, coating thickness, thermal diffusivity of insulation material or an increase in the thermal conductivity of the insulation material. The results of this study will be helpful for selecting a proper start time of the linear region for the THWM using insulation-coated hot-wires.
Keywords
Transient Hot-Wire Method; Thermal Conductivity; Insulation Coating; Linear Region;
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