有限振幅気柱振動に伴う非線形現象 : 第1報,一次元解析

概要

論文の詳細を見る
Nonlinear phenomena known as steady pressure distribution, steady streaming and steady heat flux induced by finite-amplitude oscillation of an air column in a closed tube are not only investigated from a standpoint of physical interest, but also for engineering applications. Steady pressure distribution provides a valveless standing-wave compressor. Steady streaming and heat flux, which are called acoustic streaming and thermoacoustic effects, respectively, are able to improve heat and mass transfer. These are estimated from the steady part of the second-order term of a perturbation expansion in which the first-order approximation is a sinusoidal oscillation of the air column. In engineering applications, however, nonlinear phenomena induced by finite- amplitude oscillation accompanying shock wave propagation become the subject of studies. The present study deals with numerical analysis of the nonlinear phenomena described above. In this case a numerical scheme with stability and high accuracy is required. In the first step of this study, in order to examine the numerical method, nonlinear deformation of pressure waves and steady pressure distribution produced in the closed tube are investigated by one-dimensional analysis. Calculated results agree well with experimental results.
一般社団法人日本機械学会の論文
1994-12-25