Ambient gas entrainment into a transient gas jet: (Visualization of surrounding air motion and estimation of entrainment amount by path line method)

Eiji Tomita; Yoshisuke Hamamoto; Hiroyuki Tsutsumi; Shiro Takasaki

doi:10.1299/jsmeb.39.546

Ambient gas entrainment into a transient gas jet: (Visualization of surrounding air motion and estimation of entrainment amount by path line method)

Eiji Tomita, Yoshisuke Hamamoto, Hiroyuki Tsutsumi, Shiro Takasaki

Graduate School of Natural Science and Technology

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

2 Citations (Scopus)

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 random shutter camera with various shutter times was applied. Large (40 μm), lightweight microballoon 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 (LDV). Consequently, (1) the jet configuration and the entrainment process could be visualized simultaneously, and (2) this path line method was found to be very useful for estimating the air mass entrained because of the good agreement with the values obtained using LDV.

Original language	English
Pages (from-to)	546-553
Number of pages	8
Journal	JSME International Journal, Series B: Fluids and Thermal Engineering
Volume	39
Issue number	3
DOIs	https://doi.org/10.1299/jsmeb.39.546
Publication status	Published - Aug 1996

Keywords

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

ASJC Scopus subject areas

Mechanical Engineering
Physical and Theoretical Chemistry
Fluid Flow and Transfer Processes

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10.1299/jsmeb.39.546

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Ambient gas entrainment into a transient gas jet: (Visualization of surrounding air motion and estimation of entrainment amount by path line method). / Tomita, Eiji; Hamamoto, Yoshisuke; Tsutsumi, Hiroyuki et al.
In: JSME International Journal, Series B: Fluids and Thermal Engineering, Vol. 39, No. 3, 08.1996, p. 546-553.

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 random shutter camera with various shutter times was applied. Large (40 μm), lightweight microballoon 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 (LDV). Consequently, (1) the jet configuration and the entrainment process could be visualized simultaneously, and (2) this path line method was found to be very useful for estimating the air mass entrained because of the good agreement with the values obtained using LDV.",

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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 random shutter camera with various shutter times was applied. Large (40 μm), lightweight microballoon 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 (LDV). Consequently, (1) the jet configuration and the entrainment process could be visualized simultaneously, and (2) this path line method was found to be very useful for estimating the air mass entrained because of the good agreement with the values obtained using LDV.

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Ambient gas entrainment into a transient gas jet: (Visualization of surrounding air motion and estimation of entrainment amount by path line method)

Abstract

Keywords

ASJC Scopus subject areas

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