低周波数領域における円管内乱流脈動入口流れの圧力,速度および乱れ強さ

概要

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Pulsatile turbulent inlet flow in a circular pipe was experimentally investigated. The wall pressure, the axial velocity and the turbulence intensity were measured at low pulsation frequencies under which fully-developed flow was quasi-steady. The measured data were compared with those of steady pipe flows. For the range of parameters investigated, the wall pressure of the inlet flow could be predicted from the distribution for a fully-developed flow. The inlet lengths of the velocity and the turbulence intensity were in agreement with a previously reported value (x<thkap>50D) for steady pipe flows. The effect of unsteadiness on the time-averaged value of the velocity and the turbulence intensity was very weak. An approximated analytical solution for the velocity of inlet flows was presented.
社団法人日本機械学会の論文
1987-12-25