Side air-jet modulation for control of heat release and pattern factor

O. Tuncer; S. Acharya; J. Cohen; A. Banaszuk

doi:10.1080/00102200590950502

Side air-jet modulation for control of heat release and pattern factor

O. Tuncer, S. Acharya^*, J. Cohen, A. Banaszuk

^*Corresponding author for this work

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

5 Citations (Scopus)

Abstract

The effect of a forced dilution air jet, introduced through the combustor shell, on the air/fuel mixing in the combustion chamber has been investigated. Thermocouple-based temperature measurements have been made at a number of forcing frequencies in the range 100-1100 Hz and blowing ratios in the range 10-15. Open-loop integral flame response to forcing has also been acquired by recording pressure and heat release spectra. A CH-radical imaging technique is used to provide spatially and temporally resolved information about the heat release behavior. The results exhibit that the mean temperature field inside the main reaction zone can be significantly altered as a consequence of air-jet modulation. The most significant effects are observed by forcing at vertical locations that are close to the dump plane. Enhancements in temperature of the order of 100-200°C and reduction in pattern factor of the order of 40% were observed, with the lowest pattern factors achieved at the lowest forcing frequency of 100 Hz.

Original language	English
Pages (from-to)	1339-1364
Number of pages	26
Journal	Combustion Science and Technology
Volume	177
Issue number	7
DOIs	https://doi.org/10.1080/00102200590950502
Publication status	Published - Jul 2005
Externally published	Yes

Funding

This work was supported by a grant from the Office of Naval Research Propulsion Program with Dr. Gabriel Roys as the program monitor. This support is gratefully acknowledged. The help and support received from Dr. Jong-Ho Uhm in doing the CH-imaging measurements is sincerely appreciated. The help and support received from Mr. Yap-Sheng Goh in the various facets of the work is also acknowledged. Helpful discussions with Dr. Satish Narayanan from United Technologies Research Center UTRC and Dr. Jeff Lovett from Pratt & Whitney are also acknowledged. Support to (UTRC) was provided by AFOSR grants F49620-98-C-0006 and F49620-01-C-0021. *Address correspondence to [email protected]

Funders	Funder number
Office of Naval Research Propulsion Program

Keywords

Forced dilution jet
Mixing
Spray combustion

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1080/00102200590950502

Cite this

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title = "Side air-jet modulation for control of heat release and pattern factor",

abstract = "The effect of a forced dilution air jet, introduced through the combustor shell, on the air/fuel mixing in the combustion chamber has been investigated. Thermocouple-based temperature measurements have been made at a number of forcing frequencies in the range 100-1100 Hz and blowing ratios in the range 10-15. Open-loop integral flame response to forcing has also been acquired by recording pressure and heat release spectra. A CH-radical imaging technique is used to provide spatially and temporally resolved information about the heat release behavior. The results exhibit that the mean temperature field inside the main reaction zone can be significantly altered as a consequence of air-jet modulation. The most significant effects are observed by forcing at vertical locations that are close to the dump plane. Enhancements in temperature of the order of 100-200°C and reduction in pattern factor of the order of 40% were observed, with the lowest pattern factors achieved at the lowest forcing frequency of 100 Hz.",

keywords = "Forced dilution jet, Mixing, Spray combustion",

author = "O. Tuncer and S. Acharya and J. Cohen and A. Banaszuk",

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T1 - Side air-jet modulation for control of heat release and pattern factor

AU - Tuncer, O.

AU - Acharya, S.

AU - Cohen, J.

AU - Banaszuk, A.

PY - 2005/7

Y1 - 2005/7

N2 - The effect of a forced dilution air jet, introduced through the combustor shell, on the air/fuel mixing in the combustion chamber has been investigated. Thermocouple-based temperature measurements have been made at a number of forcing frequencies in the range 100-1100 Hz and blowing ratios in the range 10-15. Open-loop integral flame response to forcing has also been acquired by recording pressure and heat release spectra. A CH-radical imaging technique is used to provide spatially and temporally resolved information about the heat release behavior. The results exhibit that the mean temperature field inside the main reaction zone can be significantly altered as a consequence of air-jet modulation. The most significant effects are observed by forcing at vertical locations that are close to the dump plane. Enhancements in temperature of the order of 100-200°C and reduction in pattern factor of the order of 40% were observed, with the lowest pattern factors achieved at the lowest forcing frequency of 100 Hz.

AB - The effect of a forced dilution air jet, introduced through the combustor shell, on the air/fuel mixing in the combustion chamber has been investigated. Thermocouple-based temperature measurements have been made at a number of forcing frequencies in the range 100-1100 Hz and blowing ratios in the range 10-15. Open-loop integral flame response to forcing has also been acquired by recording pressure and heat release spectra. A CH-radical imaging technique is used to provide spatially and temporally resolved information about the heat release behavior. The results exhibit that the mean temperature field inside the main reaction zone can be significantly altered as a consequence of air-jet modulation. The most significant effects are observed by forcing at vertical locations that are close to the dump plane. Enhancements in temperature of the order of 100-200°C and reduction in pattern factor of the order of 40% were observed, with the lowest pattern factors achieved at the lowest forcing frequency of 100 Hz.

KW - Forced dilution jet

KW - Mixing

KW - Spray combustion

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DO - 10.1080/00102200590950502

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VL - 177

SP - 1339

EP - 1364

JO - Combustion Science and Technology

JF - Combustion Science and Technology

IS - 7

ER -

Side air-jet modulation for control of heat release and pattern factor

Abstract

Funding

Keywords

UN SDGs

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