A Color Image Processing System for Transient Liquid Crystal Heat Transfer Experiments
- 1 July 1996
- journal article
- Published by ASME International in Journal of Turbomachinery
- Vol. 118 (3), 421-427
- https://doi.org/10.1115/1.2836682
Abstract
A color image processing system for liquid crystal heat transfer experiment has been developed. The system is capable of digitizing and processing the complete liquid crystal surface color (hue) change history in a transient test and, together with a calibration, can give the complete history of surface temperature over a full surface. Two methods for automatically processing the hue history to give heat transfer coefficient distributions are presented. Both methods raise the accuracy of the transient technique above other approaches by using the redundancy inherent in the multiple surface temperature measurements. The first regression approach applied to the determination of both h and Tgas is reported. The uncertainty in all measurements has been quantified and examples of applications of both techniques given.Keywords
This publication has 7 references indexed in Scilit:
- An Advanced Method of Processing Liquid Crystal Video Signals From Transient Heat Transfer ExperimentsJournal of Turbomachinery, 1995
- Illuminant invariant calibration of thermochromic liquid crystalsExperimental Thermal and Fluid Science, 1994
- Local Heat Transfer Coefficient and Adiabatic Wall Temperature Measurement Beneath Arrays of Staggered and Inline Impinging JetsPublished by ASME International ,1994
- A New Hue Capturing Technique for the Quantitative Interpretation of Liquid Crystal Images Used in Convective Heat Transfer StudiesJournal of Turbomachinery, 1992
- AERODYNAMIC and HEAT TRANSFER testingLiquid Crystals Today, 1992
- A Technique for Measuring Convective Heat Transfer at Rough SurfacesPublished by ASME International ,1990
- Nonlinear RegressionWiley Series in Probability and Statistics, 1989