Quantitative Measurements and Analysis of Ambient Gas Entrainment into Intermittent Gas Jets by Laser-Induced Fluorescence of Ambient Gas (LIFA) Hokkaido Univ

Format:

Conference/Event

Author/Creator:

Kido, Akihiro, author.

Conference Name:

International Congress & Exposition (1993-03-01 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1993

Summary:

Mixture formation processes of intermittent gas jets were visualized and quantified with high accuracy by a uniquely developed LIF technique (LIFA). Mixture strength inside gas jets was quantified by the fluorescence of iodine in the ambient gas excited by the sheet light of a Nd:YAG laser Two dimensional images of intermittent gas jets of various velocities were continuously recorded with VTR and quantified with high accuracy. The optimum conditions for measurements and accuracy with the LIFA technique were investigated. At the optimum setting of the initial iodine concentration in the ambient gas, accuracies better than 95% were obtained for the ambient gas entrainment ratio or jet concentration. The experimental results show that considerable amounts of ambient gas entrain just under the umbrella-like profile at the top of the jet. The mean jet concentration decreased with decreased nozzle diameter (D), and time elapsed after injection (Δt). The mean jet concentration was approximately related to only one parameter, the ratio of the discharge Reynolds number and discharge velocity of the jet, ReD/U0Δt)

Notes:

Vendor supplied data

Publisher Number:

930970

Access Restriction:

Restricted for use by site license