| Title |
A Measurement of Surface Heat Transfer Coefficient Using a Parameter Estimation Method |
| Authors |
마승환(Seung Hwan Ma); 김영만(Young Man Kim) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Surface heat transfer coefficient; Surface roughness; STS 304L; Parameter estimation method |
| Abstract |
A method for measuring the surface heat transfer coefficient, h, is presented, which combines a parameter estimation technique with the fast-response capabilities of thin film thermocouples. The developed method was applied to measure the surface heat transfer coefficient of the STS 304L specimens during quenching from pre-selected temperatures, 300 and 400℃, into RT deionized water bath. The surface of specimens were abraded with #200, #800 abrasive papers and polished with 0.3 micrometer alumina powders to investigate the surface roughness effects on h. The measured h values showed the range 10^(4)~10^(5) w/㎡C depending on the surface roughness, which were related to the mechanisms operating during water boiling. |