Temperature and velocity profiles in sooting free convection diffusion flames

James A. Ang; Patrick J. Pagni; Thomas G. Mataga; Janice M. Margle; Valeric J. Lyons

doi:10.2514/3.9892

Temperature and velocity profiles in sooting free convection diffusion flames

James A. Ang, Patrick J. Pagni, Thomas G. Mataga, Janice M. Margle, Valeric J. Lyons

Division of Engineering and Science (Abington)

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

4 Scopus citations

Abstract

Temperature and velocity profiles are measured for cyclohexane, n-heptane, ethyl alcohol and isooctane free, laminar, boundary-layer, sooting, diffusion flames. Temperatures are measured with 3 mil Pt/Pt-13%Rh thermocouples. Corrected gas temperatures are derived by performing an energy balance of convection to and radiation from the thermocouple bead incorporating the variation of air conductivity and platinum emissivity with temperature. Other effects are shown to be negligible. Velocities are measured using laser Doppler Velocimetry techniques. Profiles are compared with previously reported analytic temperature and velocity fields. Comparison of theoretical and experimental temperature profiles suggests improvement is needed in the analytical treatment that accounts for the effects of thermal cracking of the fuel. The velocity profiles are in good agreement, with the departure of theory from observation partially due to the small fluctuations inherent in these free flows.

Original language	English (US)
Pages (from-to)	323-329
Number of pages	7
Journal	AIAA journal
Volume	26
Issue number	3
DOIs	https://doi.org/10.2514/3.9892
State	Published - Mar 1988

All Science Journal Classification (ASJC) codes

Aerospace Engineering

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10.2514/3.9892

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title = "Temperature and velocity profiles in sooting free convection diffusion flames",

abstract = "Temperature and velocity profiles are measured for cyclohexane, n-heptane, ethyl alcohol and isooctane free, laminar, boundary-layer, sooting, diffusion flames. Temperatures are measured with 3 mil Pt/Pt-13%Rh thermocouples. Corrected gas temperatures are derived by performing an energy balance of convection to and radiation from the thermocouple bead incorporating the variation of air conductivity and platinum emissivity with temperature. Other effects are shown to be negligible. Velocities are measured using laser Doppler Velocimetry techniques. Profiles are compared with previously reported analytic temperature and velocity fields. Comparison of theoretical and experimental temperature profiles suggests improvement is needed in the analytical treatment that accounts for the effects of thermal cracking of the fuel. The velocity profiles are in good agreement, with the departure of theory from observation partially due to the small fluctuations inherent in these free flows.",

author = "Ang, {James A.} and Pagni, {Patrick J.} and Mataga, {Thomas G.} and Margle, {Janice M.} and Lyons, {Valeric J.}",

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AU - Ang, James A.

AU - Pagni, Patrick J.

AU - Mataga, Thomas G.

AU - Margle, Janice M.

AU - Lyons, Valeric J.

PY - 1988/3

Y1 - 1988/3

N2 - Temperature and velocity profiles are measured for cyclohexane, n-heptane, ethyl alcohol and isooctane free, laminar, boundary-layer, sooting, diffusion flames. Temperatures are measured with 3 mil Pt/Pt-13%Rh thermocouples. Corrected gas temperatures are derived by performing an energy balance of convection to and radiation from the thermocouple bead incorporating the variation of air conductivity and platinum emissivity with temperature. Other effects are shown to be negligible. Velocities are measured using laser Doppler Velocimetry techniques. Profiles are compared with previously reported analytic temperature and velocity fields. Comparison of theoretical and experimental temperature profiles suggests improvement is needed in the analytical treatment that accounts for the effects of thermal cracking of the fuel. The velocity profiles are in good agreement, with the departure of theory from observation partially due to the small fluctuations inherent in these free flows.

AB - Temperature and velocity profiles are measured for cyclohexane, n-heptane, ethyl alcohol and isooctane free, laminar, boundary-layer, sooting, diffusion flames. Temperatures are measured with 3 mil Pt/Pt-13%Rh thermocouples. Corrected gas temperatures are derived by performing an energy balance of convection to and radiation from the thermocouple bead incorporating the variation of air conductivity and platinum emissivity with temperature. Other effects are shown to be negligible. Velocities are measured using laser Doppler Velocimetry techniques. Profiles are compared with previously reported analytic temperature and velocity fields. Comparison of theoretical and experimental temperature profiles suggests improvement is needed in the analytical treatment that accounts for the effects of thermal cracking of the fuel. The velocity profiles are in good agreement, with the departure of theory from observation partially due to the small fluctuations inherent in these free flows.

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Temperature and velocity profiles in sooting free convection diffusion flames

Abstract

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