Ambient Gas Entrainment into a Transient Gas Jet (Visualization of Surrounding Air Motion and an Estimation of Entrainment Amount by Path Line Method)

Eiji Tomita; Yoshisuke Hamamoto; Hiroyuki Tsutsumi; Shiro Takasaki

doi:10.1299/kikaib.59.2469

Ambient Gas Entrainment into a Transient Gas Jet (Visualization of Surrounding Air Motion and an Estimation of Entrainment Amount by Path Line Method)

Eiji Tomita, Yoshisuke Hamamoto, Hiroyuki Tsutsumi, Shiro Takasaki

Research output: Contribution to journal › Article › peer-review

Abstract

For the study of the combustion in a transient gas jet used in gas diesel engines, it is very important to investigate the entrainment process of the surroundings of the jet. In this study, a path line method utilizing a CCD camera with various shutter times was applied. Large (40 μm), light weight micro-balloon particles are used for scattering the path lines of the surroundings and fine particles (0.75 μm) are used for visualizing the approximate shape of the jet. The transient gas velocity was also measured with a two-component laser Doppler velocimeter. Consequently, (1) the jet shape and the entrainment process could be visualized simultaneously, and (2) this path line method was found to be very useful fot estimating the amount of entrainment air because of the good agreement with the value obtained using LDV data.

Original language	English
Pages (from-to)	2469-2476
Number of pages	8
Journal	Transactions of the Japan Society of Mechanical Engineers Series B
Volume	59
Issue number	564
DOIs	https://doi.org/10.1299/kikaib.59.2469
Publication status	Published - 1993

Keywords

Entrainment
Flow Visualization
Jet
LDA
LDV
Path Line Method
Transient Gas Jet
Unsteady Flow

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering

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10.1299/kikaib.59.2469

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Ambient Gas Entrainment into a Transient Gas Jet (Visualization of Surrounding Air Motion and an Estimation of Entrainment Amount by Path Line Method). / Tomita, Eiji; Hamamoto, Yoshisuke; Tsutsumi, Hiroyuki et al.
In: Transactions of the Japan Society of Mechanical Engineers Series B, Vol. 59, No. 564, 1993, p. 2469-2476.

Research output: Contribution to journal › Article › peer-review

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abstract = "For the study of the combustion in a transient gas jet used in gas diesel engines, it is very important to investigate the entrainment process of the surroundings of the jet. In this study, a path line method utilizing a CCD camera with various shutter times was applied. Large (40 μm), light weight micro-balloon particles are used for scattering the path lines of the surroundings and fine particles (0.75 μm) are used for visualizing the approximate shape of the jet. The transient gas velocity was also measured with a two-component laser Doppler velocimeter. Consequently, (1) the jet shape and the entrainment process could be visualized simultaneously, and (2) this path line method was found to be very useful fot estimating the amount of entrainment air because of the good agreement with the value obtained using LDV data.",

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AU - Takasaki, Shiro

PY - 1993

Y1 - 1993

N2 - For the study of the combustion in a transient gas jet used in gas diesel engines, it is very important to investigate the entrainment process of the surroundings of the jet. In this study, a path line method utilizing a CCD camera with various shutter times was applied. Large (40 μm), light weight micro-balloon particles are used for scattering the path lines of the surroundings and fine particles (0.75 μm) are used for visualizing the approximate shape of the jet. The transient gas velocity was also measured with a two-component laser Doppler velocimeter. Consequently, (1) the jet shape and the entrainment process could be visualized simultaneously, and (2) this path line method was found to be very useful fot estimating the amount of entrainment air because of the good agreement with the value obtained using LDV data.

AB - For the study of the combustion in a transient gas jet used in gas diesel engines, it is very important to investigate the entrainment process of the surroundings of the jet. In this study, a path line method utilizing a CCD camera with various shutter times was applied. Large (40 μm), light weight micro-balloon particles are used for scattering the path lines of the surroundings and fine particles (0.75 μm) are used for visualizing the approximate shape of the jet. The transient gas velocity was also measured with a two-component laser Doppler velocimeter. Consequently, (1) the jet shape and the entrainment process could be visualized simultaneously, and (2) this path line method was found to be very useful fot estimating the amount of entrainment air because of the good agreement with the value obtained using LDV data.

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Ambient Gas Entrainment into a Transient Gas Jet (Visualization of Surrounding Air Motion and an Estimation of Entrainment Amount by Path Line Method)

Abstract

Keywords

ASJC Scopus subject areas

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