Numerical Analysis of Transient Gas Jet and Wall Impinging Jet by Discrete Vortex Method

Numerical Analysis of Transient Gas Jet and Wall Impinging Jet by Discrete Vortex Method

Generally speaking, it is very difficult to clarify the growth process of large-scale vortices in a transient gas jet. The vortices have a great effect on the mechanism of mixture formation between the jet itself and the surroundings. The objective of the study presented here is the clarification of...

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Veröffentlicht in:Nihon Kikai Gakkai rombunshuu. B hen 1996/05/25, Vol.62(597), pp.1998-2004
Hauptverfasser: HYUN, Gi-Soo, NOGAMI, Mitsuhide, SENDA, Jiro, FUJIMOTO, Hajime
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Sprache:eng ; jpn
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Discrete Vortex Method
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container_end_page 2004
container_issue 597
container_start_page 1998
container_title Nihon Kikai Gakkai rombunshuu. B hen
container_volume 62
creator HYUN, Gi-Soo
NOGAMI, Mitsuhide
SENDA, Jiro
FUJIMOTO, Hajime
description Generally speaking, it is very difficult to clarify the growth process of large-scale vortices in a transient gas jet. The vortices have a great effect on the mechanism of mixture formation between the jet itself and the surroundings. The objective of the study presented here is the clarification of this mechanism in both a free jet and a jet impinging on a flat wall by means of the flow visualization of 2D images obtain by a thin sheet of laser light in experiments and numerical analysis by the discrete vortex method. The mechanism of the vortex growth and the coherent structure of vortices entraining the surroundings are clarified in the case of a free jet. In the wall impinging jet, the structure inside the jet is divided into three regions, namely, free jet region, impingement region and wall-main jet region. The results of the numerical analysis agree qualitatively with the experimental data.
doi_str_mv 10.1299/kikaib.62.1998
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source J-STAGE Free; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals
subjects Discrete Vortex Method
title Numerical Analysis of Transient Gas Jet and Wall Impinging Jet by Discrete Vortex Method
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