Temperature fluctuation scaling in reacting boundary layers

M. Pino Martin; Graham V. Candler

doi:10.2514/6.2001-2717

Temperature fluctuation scaling in reacting boundary layers

M. Pino Martin, Graham V. Candler

Aerospace Engineering and Mechanics

Research output: Contribution to conference › Paper › peer-review

14 Scopus citations

Abstract

The direct numerical simulation (DNS) data of a turbulent, reacting boundary layer is used to study the turbulence-chemistry interaction and the scaling of the temperature fluctuations. We find that there is a feedback between the turbulence and the chemical reactions. Temperature fluctuations increase the reaction rates. Endothermic reactions reduce the magnitude of the temperature fluctuations. However, the turbulent boundary layer is self-sustained and the magnitude of the temperature fluctuations is maintained. Exothermic reactions increase the magnitude of the temperature fluctuations. The reactions cause localized compressions and expansions that feed the turbulent kinetic energy. The evolution equations for the turbulent energy show that the feedback takes place through the transport and production terms. The data reveals a physically consistent relation between the temperature variance and the mean flow parameters. These results are consistent with those previously found in reacting isotropic turbulence.^1,2

Original language	English (US)
DOIs	https://doi.org/10.2514/6.2001-2717
State	Published - 2001
Event	15th AIAA Computational Fluid Dynamics Conference 2001 - Anaheim, CA, United States Duration: Jun 11 2001 → Jun 14 2001

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Other	15th AIAA Computational Fluid Dynamics Conference 2001
Country/Territory	United States
City	Anaheim, CA
Period	6/11/01 → 6/14/01

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title = "Temperature fluctuation scaling in reacting boundary layers",

abstract = "The direct numerical simulation (DNS) data of a turbulent, reacting boundary layer is used to study the turbulence-chemistry interaction and the scaling of the temperature fluctuations. We find that there is a feedback between the turbulence and the chemical reactions. Temperature fluctuations increase the reaction rates. Endothermic reactions reduce the magnitude of the temperature fluctuations. However, the turbulent boundary layer is self-sustained and the magnitude of the temperature fluctuations is maintained. Exothermic reactions increase the magnitude of the temperature fluctuations. The reactions cause localized compressions and expansions that feed the turbulent kinetic energy. The evolution equations for the turbulent energy show that the feedback takes place through the transport and production terms. The data reveals a physically consistent relation between the temperature variance and the mean flow parameters. These results are consistent with those previously found in reacting isotropic turbulence.1,2",

author = "Martin, {M. Pino} and Candler, {Graham V.}",

year = "2001",

doi = "10.2514/6.2001-2717",

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T1 - Temperature fluctuation scaling in reacting boundary layers

AU - Martin, M. Pino

AU - Candler, Graham V.

PY - 2001

Y1 - 2001

N2 - The direct numerical simulation (DNS) data of a turbulent, reacting boundary layer is used to study the turbulence-chemistry interaction and the scaling of the temperature fluctuations. We find that there is a feedback between the turbulence and the chemical reactions. Temperature fluctuations increase the reaction rates. Endothermic reactions reduce the magnitude of the temperature fluctuations. However, the turbulent boundary layer is self-sustained and the magnitude of the temperature fluctuations is maintained. Exothermic reactions increase the magnitude of the temperature fluctuations. The reactions cause localized compressions and expansions that feed the turbulent kinetic energy. The evolution equations for the turbulent energy show that the feedback takes place through the transport and production terms. The data reveals a physically consistent relation between the temperature variance and the mean flow parameters. These results are consistent with those previously found in reacting isotropic turbulence.1,2

AB - The direct numerical simulation (DNS) data of a turbulent, reacting boundary layer is used to study the turbulence-chemistry interaction and the scaling of the temperature fluctuations. We find that there is a feedback between the turbulence and the chemical reactions. Temperature fluctuations increase the reaction rates. Endothermic reactions reduce the magnitude of the temperature fluctuations. However, the turbulent boundary layer is self-sustained and the magnitude of the temperature fluctuations is maintained. Exothermic reactions increase the magnitude of the temperature fluctuations. The reactions cause localized compressions and expansions that feed the turbulent kinetic energy. The evolution equations for the turbulent energy show that the feedback takes place through the transport and production terms. The data reveals a physically consistent relation between the temperature variance and the mean flow parameters. These results are consistent with those previously found in reacting isotropic turbulence.1,2

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T2 - 15th AIAA Computational Fluid Dynamics Conference 2001

Y2 - 11 June 2001 through 14 June 2001

ER -

Temperature fluctuation scaling in reacting boundary layers

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