管群中の伝熱管の直交流による振動のランダム流体力統計量による評価

概要

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For heat exchangers with a small-pitch tube bundle, it is important to evaluate the vibration of the tube due to strong turbulence of fairly high-speed cross-flow. In this study, statistical quantities of fluid force were obtained experimentally to numerically evaluate the turbulent-flow-induced vibration. A tube bundle of 0.0254-meter-diameter and 0.032-meter-pitch tubes was installed in an experimental test section. Specifically, local fluid force acting on a tube was measured using 0.013-meter-wide force sensors installed along the axial direction of the measured tube, and the correlation length was deduced from the fluid forces of the two adjacent sensors. Vibration levels evaluated analytically using the fluid force correlation were compared with the levels obtained from several experiments. The analytical results agreed well with the experimental vibration levels.
社団法人日本機械学会の論文
1993-12-25