Temperature and related statistics in turbulent jet flames

Temperature and related statistics in turbulent jet flames  This paper describes the use of digitally-compensated thermocouples to characterise the time-resolved behaviour of the temperature field in turbulent non-premixed jet flames for Re?2×104, including the transport of heat and the related temperature dissipation. The experimental procedures used are analysed, including the thermocouple time constant determination and the numerical derivative compensation method, and assessments of accuracy are provided for the cross-correlation techniques used in order to estimate high-order temperature statistics in the flames studied. The results quantify the influence of the spatial resolution of the measuring systems on the accuracy of correlation values, regarding the characteristics scales of the flames studied, and demonstrate the applicability of fine-wire thermocouples to characterise the turbulent transport and the dissipation of temperature in non-premixed jet flames. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Temperature and related statistics in turbulent jet flames

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Publisher
Springer-Verlag
Copyright
Copyright © 1998 by Springer-Verlag Berlin Heidelberg
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s003480050159
Publisher site
See Article on Publisher Site

Abstract

 This paper describes the use of digitally-compensated thermocouples to characterise the time-resolved behaviour of the temperature field in turbulent non-premixed jet flames for Re?2×104, including the transport of heat and the related temperature dissipation. The experimental procedures used are analysed, including the thermocouple time constant determination and the numerical derivative compensation method, and assessments of accuracy are provided for the cross-correlation techniques used in order to estimate high-order temperature statistics in the flames studied. The results quantify the influence of the spatial resolution of the measuring systems on the accuracy of correlation values, regarding the characteristics scales of the flames studied, and demonstrate the applicability of fine-wire thermocouples to characterise the turbulent transport and the dissipation of temperature in non-premixed jet flames.

Journal

Experiments in FluidsSpringer Journals

Published: Feb 20, 1998

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