層流減速流れの流動形態

概要

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Laminar decelerating pipe flows in a case where the cross-sectional mean velocity at the downstream end in a single pipeline decreases linearly are investigated. Basic equations for an axisymmetric viscous unsteady flow in a horizontal pipe contaning a slightly compressible fluid are numerically calculated by the method of characteristics and the finite-difference technique by using wall shear stress evaluated from the cross-sectional distribution of instantaneous axial velocities. By changing the time of closure of a valve, pressure, velocity and friction factor distributions along the pipe axis are numerically obtained, and the flow pattern and wave propagation in the pipe are shown schematically. Furthermore, the cross-sectional distributions of axial velocities along the pipe axis are also presented in this report.
一般社団法人日本機械学会の論文
1996-01-25