Ambient gas entrainment into transient gas jet (Spatial and temporal change of air entrainment)

Eiji Tomita, Yoshisuke Hamamoto, Hiroyuki Tsutsumi

Research output: Contribution to journalArticle

Abstract

It is very important to investigate the entrainment process of ambient air into a transient gas jet in order to discuss the combustion of the fuel jet in gas diesel engines. In this study, a gas jet was injected into still air during a very short period of 11.5 milliseconds. Cross sectional images of the jet were visualized at various times from the initiation of the injection. The mass of air entrainment into the jet was also obtained from the path line method proposed by the authors, and the spatial and temporal change of the ambient air entrainment into the jet was approximately clarified. The air from upstream side of the unsteady part of the jet is entrained more than that from the steady part. The ensemble averaged air mass entrained from a cross section perpendicular to the jet axis is axisymmetric; however, the entrainment mass of every jet is not always axisymmetric.

Original languageEnglish
Pages (from-to)3938-3944
Number of pages7
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume59
Issue number568
Publication statusPublished - Dec 1993
Externally publishedYes

Fingerprint

Air entrainment
gas jets
entrainment
air
Gases
gases
Air
jet engine fuels
diesel engines
air masses
upstream
Gas engines
Jet fuel
injection
Diesel engines
cross sections

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Ambient gas entrainment into transient gas jet (Spatial and temporal change of air entrainment). / Tomita, Eiji; Hamamoto, Yoshisuke; Tsutsumi, Hiroyuki.

In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 59, No. 568, 12.1993, p. 3938-3944.

Research output: Contribution to journalArticle

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