流れのはく離を伴う二次元弾性流路内流れの修正数学モデルについて

概要

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A modified one-dimensional mathematical model is presented to describe unsteady separated-flow in a two-dimensional elastic channel made of a pair of membranes supported from the outsides by distributed nonlinear springs. Modified governing equations are derived from the two-dimensional flow equations of continuity and momentum from a mathematical point of view, assuming that the flow in the diverging region downstream of the separation point is characterized by a parallel-sided jet surrounded by dead water. Numerical calculations have been performed to compare the present model to the previous one. A numerical example shows that the amplitude of the self-excited oscillation predicted by the former model is smaller than that by the latter. The rapid change of the pressure distribution downstream of the throat of the channel is suppressed by the correction term introduced in the momentum equation.
一般社団法人日本機械学会の論文
1991-04-25