Determining the effect of species composition on temperature fields of tank flames using real-time holographic interferometry

Markus Gawlowski; Kerry E. Kelly; Laurie A. Marcotte; Axel Schönbucher

doi:10.1364/AO.48.004625

Applied Optics
Vol. 48,
Issue 23,
pp. 4625-4636
(2009)
•https://doi.org/10.1364/AO.48.004625

Determining the effect of species composition on temperature fields of tank flames using real-time holographic interferometry

Markus Gawlowski, Kerry E. Kelly, Laurie A. Marcotte, and Axel Schönbucher

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Markus Gawlowski, Kerry E. Kelly, Laurie A. Marcotte, and Axel Schönbucher, "Determining the effect of species composition on temperature fields of tank flames using real-time holographic interferometry," Appl. Opt. 48, 4625-4636 (2009)

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Abstract

Interference fringe fields and the visible flame field of a $50 mm$ diameter n-hexane tank flame were simultaneously measured using a real-time holographic interferometer with special image optics. An inhouse developed image processing method was applied to the holographic images to calculate the interference fringe order profiles. The effect of species composition on temperature profiles was studied by considering three different cases: using the measured species profiles, using an overall reaction mecha nism based on stoichiometric combustion, and by assuming that the flame consists of hot air. The results show that species composition has the largest effect on temperature fields in regions near the flame axis at lower axial distances. In the region of the plume zone, the flame consists primarily of hot air due to the increase in total entrained air.

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Species	Standard Density $ρ_{i, 0}$ ( $kg / m^{3}$ )	Molar Mass $M_{i}$ (kg/kmol)	Specific Standard Refraction $N_{i, 0}$ ( $m^{3} / kg$ )
$H_{2}$	0.09	2	$10.35 \times 10^{- 4}$
$N_{2}$	1.25	28	$1.60 \times 10^{- 4}$
$O_{2}$	1.43	32	$1.27 \times 10^{- 4}$
CO	1.25	28	$1.80 \times 10^{- 4}$
${CO}_{2}$	1.98	44	$1.52 \times 10^{- 4}$
$C_{2} H_{4}$	1.26	28	$3.81 \times 10^{- 4}$
$H_{2} O$	0.77	18	$2.22 \times 10^{- 4}$
$C_{3 -}$	1.96	43	$3.66 \times 10^{- 4}$
$C_{4 -}$	2.60	57	$3.53 \times 10^{- 4}$
$C_{5 -}$	3.30	71	$3.41 \times 10^{- 4}$
$C_{6} H_{14}$	3.83	86	$3.54 \times 10^{- 4}$
O		16	$1.80 \times 10^{- 4}$
OH		17	$3.50 \times 10^{- 4}$
N		14	$3.10 \times 10^{- 4}$

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Applied Optics