Abstract
Recently, the transient technique using infrared thermometer has widely been used for measuring the distribution of local heat transfer coefficient. 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 Re_<r0> from 0 to 1.8×10^6 and the penetration flow Reynolds number Re_s from 2×10^4 to 7×10^4, were observed. These dimensionless parameter is possible to reproduce the range of actual and the same order. Non-dimensional disk casing gap-to-radius ratio (s/2r_0) 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.
