Abstract
Recently, the transient technique using infrared thermometer has widely been used for measuring the distribution of local heat transfer. In this study, To obtain high-precision measurement of the rotating disk surface temperature field, we have proposed a phase-locked method. The effects of two parameters, on the heat transfer phenomena the rotational Reynolds number Rer0 from 0 to1.8x10^6 and the penetration flow Reynolds number Res from 2x10^4 to 7x10^4, were observed. Non-dimensional disk casing gap-to- radius ratio (s/r0) fixed 0.026. The present results showed that as the rotational Reynolds number increases, nusselt number tends to 2×10^3 to 3×10^3 increase at test condision.
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