The Proceedings of the Thermal Engineering Conference
Online ISSN : 2424-290X
2013
Session ID : I224
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I224 Time-Spatial Characteristics of Turbulent Heat Transfer in a Circular Pipe
Naoki ShiibaraHajime NakamuraShunsuke Yamada
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Abstract
Unsteady measurement of convective heat transfer was performed to a water flow in a horizontal circular pipe using a high-speed infrared thermograph. The test surface was fabricated from a 22μm thick titanium foil coated with black paint. The removable turbulence promoter was attached at entrance of the pipe. From the time-series data of the heat transfer distribution, we could obtain the rms value of fluctuating heat transfer coefficient and mean spanwise wavelength of the thermal streaks and the mean period of heat transfer fluctuation.
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© 2013 The Japan Society of Mechanical Engineers
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