Effect of swirl on lifted flame characteristics in nonpremixed jets

M. S. Cha; D. S. Lee; S. H. Chung

doi:10.1016/S0010-2180(98)00114-X

Effect of swirl on lifted flame characteristics in nonpremixed jets

M. S. Cha, D. S. Lee, S. H. Chung^*

^*Corresponding author for this work

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

12 Scopus citations

Abstract

The effect of swirl on lifted flames in a nonpremixed jet has been studied experimentally by rotating a nozzle to generate a continuous swirl. A model for turbulent lifted flames, based on turbulent large scale structure, is extended to account for the effect of swirl in the prediction of lift-off heights. Results show that the lift-off height decreases linearly with nozzle rotational speed in turbulent jets. The model for swirl jets predicts that a normalized lift-off height depends solely on swirl number, and experimental results substantiate this prediction. For laminar jets, the lift-off height shows a nonlinear dependence on nozzle rotational speed and becomes independent of jet velocity as the swirl number increases. These characteristics are attributed to the jet breakup behavior in swirl jets.

Original language	English (US)
Pages (from-to)	636-645
Number of pages	10
Journal	Combustion and Flame
Volume	117
Issue number	3
DOIs	https://doi.org/10.1016/S0010-2180(98)00114-X
State	Published - May 1999
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the Turbo and Power Machinery Research Center, Seoul National University and the Ministry of Trade, Industry and Energy, Korea.

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Fuel Technology
Energy Engineering and Power Technology
General Physics and Astronomy

Access to Document

10.1016/S0010-2180(98)00114-X

Cite this

@article{6d9ec1bd4dd54720af7cc65810191c4f,

title = "Effect of swirl on lifted flame characteristics in nonpremixed jets",

abstract = "The effect of swirl on lifted flames in a nonpremixed jet has been studied experimentally by rotating a nozzle to generate a continuous swirl. A model for turbulent lifted flames, based on turbulent large scale structure, is extended to account for the effect of swirl in the prediction of lift-off heights. Results show that the lift-off height decreases linearly with nozzle rotational speed in turbulent jets. The model for swirl jets predicts that a normalized lift-off height depends solely on swirl number, and experimental results substantiate this prediction. For laminar jets, the lift-off height shows a nonlinear dependence on nozzle rotational speed and becomes independent of jet velocity as the swirl number increases. These characteristics are attributed to the jet breakup behavior in swirl jets.",

author = "Cha, {M. S.} and Lee, {D. S.} and Chung, {S. H.}",

note = "Funding Information: This work was supported by the Turbo and Power Machinery Research Center, Seoul National University and the Ministry of Trade, Industry and Energy, Korea. ",

year = "1999",

month = may,

doi = "10.1016/S0010-2180(98)00114-X",

language = "English (US)",

volume = "117",

pages = "636--645",

journal = "Combustion and Flame",

issn = "0010-2180",

publisher = "Elsevier",

number = "3",

}

TY - JOUR

T1 - Effect of swirl on lifted flame characteristics in nonpremixed jets

AU - Cha, M. S.

AU - Lee, D. S.

AU - Chung, S. H.

N1 - Funding Information: This work was supported by the Turbo and Power Machinery Research Center, Seoul National University and the Ministry of Trade, Industry and Energy, Korea.

PY - 1999/5

Y1 - 1999/5

N2 - The effect of swirl on lifted flames in a nonpremixed jet has been studied experimentally by rotating a nozzle to generate a continuous swirl. A model for turbulent lifted flames, based on turbulent large scale structure, is extended to account for the effect of swirl in the prediction of lift-off heights. Results show that the lift-off height decreases linearly with nozzle rotational speed in turbulent jets. The model for swirl jets predicts that a normalized lift-off height depends solely on swirl number, and experimental results substantiate this prediction. For laminar jets, the lift-off height shows a nonlinear dependence on nozzle rotational speed and becomes independent of jet velocity as the swirl number increases. These characteristics are attributed to the jet breakup behavior in swirl jets.

AB - The effect of swirl on lifted flames in a nonpremixed jet has been studied experimentally by rotating a nozzle to generate a continuous swirl. A model for turbulent lifted flames, based on turbulent large scale structure, is extended to account for the effect of swirl in the prediction of lift-off heights. Results show that the lift-off height decreases linearly with nozzle rotational speed in turbulent jets. The model for swirl jets predicts that a normalized lift-off height depends solely on swirl number, and experimental results substantiate this prediction. For laminar jets, the lift-off height shows a nonlinear dependence on nozzle rotational speed and becomes independent of jet velocity as the swirl number increases. These characteristics are attributed to the jet breakup behavior in swirl jets.

UR - http://www.scopus.com/inward/record.url?scp=0033136978&partnerID=8YFLogxK

U2 - 10.1016/S0010-2180(98)00114-X

DO - 10.1016/S0010-2180(98)00114-X

M3 - Article

AN - SCOPUS:0033136978

SN - 0010-2180

VL - 117

SP - 636

EP - 645

JO - Combustion and Flame

JF - Combustion and Flame

IS - 3

ER -

Effect of swirl on lifted flame characteristics in nonpremixed jets

Abstract

Bibliographical note

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this