数値計算による爆ごう波形成に関する一提案(熱工学, 内燃機関, 動力など)

概要

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This paper is concerned with a new approach that produces numerically a detonation with a triple-shock-waves structure. Hitherto, propagation behavior of gaseous detonations has been analyzed by solving Euler equations including chemical reactions under a combination of a solution of one-dimensional C-J detonation and some pairs of disturbances with different exothermicity as an initial condition. That is, addition of any disturbances such as exothermicity in the vicinity of the initial wave front was necessary as far as Euler equations were treated. However, in this paper, Navier-Stokes equations were solved by using only solution of the one-dimensional C-J detonation as an initial condition. The present method is more convenient than the conventional method. As a result, it was found that numerical production of a two-dimensional unsteady detonation was possible by utilizing the semi-implicit MacCormack-TVD scheme together with an adequate mesh size which is less than Δx=Δy=0.09 mm.
一般社団法人日本機械学会の論文
2002-05-25