抄録
In this study, by using a pulsative pressure generator proposed in our previous paper, pressure drop of a circular pipe with sharp egged ends is measured and evaluated as Fanning friction factor F_d. Influence of temperature distribution of the wall on F_d is also confirmed. The values of F_d in both of laminar and turbulent regions are greater than that of steady flow. Critical Reynolds number R_<ec> depends on frequency of the pulsative pressure and decreases with decreasing the frequency. The results with and without a temperature distribution, by using fluid property calculated by firm temperature, agree with together in test conditions.
