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Improvement of Calibration Method of Thermochromic Liquid Crystal Reflecting Measurement Angle
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 Title & Authors
Improvement of Calibration Method of Thermochromic Liquid Crystal Reflecting Measurement Angle
Yoon, Soon-Hyun; Sim, Jae-Kyung; Woo, Chang-Soo;
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Thermochromic liquid crystal reflect a unique color at even temperature. Therefore, they have been successfully applied to non-intrusive heat transfer research. Hue capturing method is widely used in the quantitative measurement from the TLC image. However it is affected by several measurement conditions. The distances of camera and light source have little influence on the color, but the value of hue is seriously affected by the measurement angle. In this study, the hue capturing method is improved by considering the effect of measurement angle. This improved calibration method can diminish the misreading of temperature caused by curvature of test surface.
Thermochromic Liquid Crystal;Hue;Saturation;Intensity;Colorimetric Transformation;Digital Image Processing;Measurement Angle;
 Cited by
비정상 후류가 선형터빈익렬의 유동 및 열전달에 미치는 영향에 관한 연구,윤순현;심재경;김동건;

대한기계학회논문집B, 2001. vol.25. 2, pp.164-170 crossref(new window)
Klein, E.J., 1968, 'Application of Liquid Crystals to Boundary-layer Flow Visualizations,' AIAA Paper, No. 68-376, AIAA Third Aerodynamic Testing Conference

Hippensteele, S.A., Russel, L.M., Torres, F.J., 1985, 'Local Heat Transfer Measurements on a Large Scale-Model Turbine Blade Airfoil Using a Composite of a Heater Element and Liquid Crystals,' Trans. of the ASME Journal of Engineering for Gas Turbines and Power, Vol. 107, pp. 953-960

Goldstein, R.J., Franchett, M.E., 1988, 'Heat Transfer From a Flat Surface to an Oblique Impinging Jet,' Trans. of the ASME Journal of Heat Transfer, Vol. 110, pp. 84-90

Akino, N., Kunugi, T., Ichimiya, K., Mitsushiro, K., Ueda, M,, 1989, 'Improved Liquid-Crystal Thermometry Excluding Human Color Sensation,' Trans. of the ASME Journal of Heat Transfer, Vol. 111, pp. 558-565

Kim, K. S., 1993, 'An Experimental Study on the Flow and Heat Transfer Characteristics of an Impinging Jet,' KSME J., Vol. 7, pp. 258-271

Kim, K. S., 1993, 'An Efficient Way of Convection heat Transfer Measurement on a Curved Surface,' KSME J., Vol. 4, pp. 349-363

Camci, C., Kim, K., Hippensteele, S.A., Poinsatte, P.E., 1993, 'Evaluation of a Hue Capturing based Transient Liquid Crystal Method for High-Resolution Mapping of Convective Heat Transfer on Curved Surfaces,' ASME Journal of Heat Transfer, Vol. 115, pp. 311-318

김예용, 1995, '액정을 이용한 열전달 측정방법에서의 측정오차를 줄이기 위한 연구,' 부산대학교 대학원 석사학위논문

Yoon, S. H., Kim, M. K. and Lee, D. H., 1997, 'Turbulent Flow and Heat transfer Characteristics of a Two-dimensional Oblique Plate Impinging Jet,' Int. J. KSME, Vol. 11, No. 4, pp. 476-483