Visualization of ambient air motion and entrainment into a transient gas jet impinging on a flat wall

Eiji Tomita; Yoshisuke Hamamoto; Hiroyuki Tsutsumi; Shiro Takasaki; Toru Watanabe; Sadami Yoshiyama

doi:10.4271/952513

Visualization of ambient air motion and entrainment into a transient gas jet impinging on a flat wall

Eiji Tomita, Yoshisuke Hamamoto, Hiroyuki Tsutsumi, Shiro Takasaki, Toru Watanabe, Sadami Yoshiyama

Research output: Contribution to journal › Conference article › peer-review

10 Citations (Scopus)

Abstract

A turbulent gas jet impinging on a flat wall was visualized by a laser sheet method. Velocity fields were determined from the images with a high speed video system by processing them in terms of the cross correlation method for the jet and particle tracking method for the ambient air from the same images. The vortex flow near the transient jet tip impinging on the wall was visualized and analyzed successfully. The velocity field obtained from the above methods was compared to that determined with a laser Doppler anemometer. The path line of a certain period which was taken with a CCD camera with controlled shutter was analyzed and the mean rate of air entrainment was determined quantitatively. The spatial and temporal change of the entrainment rate was estimated and it was found that the entrainment rate near the upstream part of the jet tip region is larger because of the vortex.

Original language	English
Journal	SAE Technical Papers
DOIs	https://doi.org/10.4271/952513
Publication status	Published - Jan 1 1995
Event	Fuels and Lubricants Meeting and Exposition - Toronto, ON, Canada Duration: Oct 16 1995 → Oct 19 1995

ASJC Scopus subject areas

Automotive Engineering
Safety, Risk, Reliability and Quality
Pollution
Industrial and Manufacturing Engineering

Access to Document

10.4271/952513

Cite this

@article{f2aef5a3814c4d43a49aeb696f8de44f,

title = "Visualization of ambient air motion and entrainment into a transient gas jet impinging on a flat wall",

abstract = "A turbulent gas jet impinging on a flat wall was visualized by a laser sheet method. Velocity fields were determined from the images with a high speed video system by processing them in terms of the cross correlation method for the jet and particle tracking method for the ambient air from the same images. The vortex flow near the transient jet tip impinging on the wall was visualized and analyzed successfully. The velocity field obtained from the above methods was compared to that determined with a laser Doppler anemometer. The path line of a certain period which was taken with a CCD camera with controlled shutter was analyzed and the mean rate of air entrainment was determined quantitatively. The spatial and temporal change of the entrainment rate was estimated and it was found that the entrainment rate near the upstream part of the jet tip region is larger because of the vortex.",

author = "Eiji Tomita and Yoshisuke Hamamoto and Hiroyuki Tsutsumi and Shiro Takasaki and Toru Watanabe and Sadami Yoshiyama",

year = "1995",

month = jan,

day = "1",

doi = "10.4271/952513",

language = "English",

journal = "SAE Technical Papers",

issn = "0148-7191",

publisher = "SAE International",

note = "Fuels and Lubricants Meeting and Exposition ; Conference date: 16-10-1995 Through 19-10-1995",

}

TY - JOUR

T1 - Visualization of ambient air motion and entrainment into a transient gas jet impinging on a flat wall

AU - Tomita, Eiji

AU - Hamamoto, Yoshisuke

AU - Tsutsumi, Hiroyuki

AU - Takasaki, Shiro

AU - Watanabe, Toru

AU - Yoshiyama, Sadami

PY - 1995/1/1

Y1 - 1995/1/1

N2 - A turbulent gas jet impinging on a flat wall was visualized by a laser sheet method. Velocity fields were determined from the images with a high speed video system by processing them in terms of the cross correlation method for the jet and particle tracking method for the ambient air from the same images. The vortex flow near the transient jet tip impinging on the wall was visualized and analyzed successfully. The velocity field obtained from the above methods was compared to that determined with a laser Doppler anemometer. The path line of a certain period which was taken with a CCD camera with controlled shutter was analyzed and the mean rate of air entrainment was determined quantitatively. The spatial and temporal change of the entrainment rate was estimated and it was found that the entrainment rate near the upstream part of the jet tip region is larger because of the vortex.

AB - A turbulent gas jet impinging on a flat wall was visualized by a laser sheet method. Velocity fields were determined from the images with a high speed video system by processing them in terms of the cross correlation method for the jet and particle tracking method for the ambient air from the same images. The vortex flow near the transient jet tip impinging on the wall was visualized and analyzed successfully. The velocity field obtained from the above methods was compared to that determined with a laser Doppler anemometer. The path line of a certain period which was taken with a CCD camera with controlled shutter was analyzed and the mean rate of air entrainment was determined quantitatively. The spatial and temporal change of the entrainment rate was estimated and it was found that the entrainment rate near the upstream part of the jet tip region is larger because of the vortex.

UR - http://www.scopus.com/inward/record.url?scp=85072420297&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85072420297&partnerID=8YFLogxK

U2 - 10.4271/952513

DO - 10.4271/952513

M3 - Conference article

AN - SCOPUS:85072420297

JO - SAE Technical Papers

JF - SAE Technical Papers

SN - 0148-7191

T2 - Fuels and Lubricants Meeting and Exposition

Y2 - 16 October 1995 through 19 October 1995

ER -

Visualization of ambient air motion and entrainment into a transient gas jet impinging on a flat wall

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this