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Thin filament infrared pyrometry: instantaneous temperature profile measurements in a weakly turbulent hydrocarbon premixed flame

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Abstract

Black body radiation from a fibre ofβ SiC can be used to investigate the temperature profile in a premixed flame. An infrared scanner determines the radiation intensity of the fibre, which is related to the fibre temperature by a calibration law. A fast time constant and excellent spatial resolution of the fibre make the method a very helpful tool to study the turbulent flames.

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Abbreviations

A :

area

C, B :

temperature coefficient calibration

d L :

laminar flame thickness

d :

diameter of the fibre

F fg :

form factor

D :

exit diameter of burner

h :

convective heat coefficient

\(\vec I\) :

acoustic intensity vector

l t :

integral length scale of turbulence

p :

acoustic pressure

Re :

Reynolds number

S :

surface

T :

temperature

u′ :

root mean square velocity

u L :

laminar combustion velocity

U :

velocity at the burner exit

\(\vec v\) :

acoustic velocity vector without flow

r :

radial axis

x :

fibre axis

z :

axial axis

δ :

diffusion length along the fibre

ɛ :

emissivity

Φ :

equivalence ratio

λ :

thermal conductivity

ρc :

heat capacity

σ :

Stefan-Boltzmann constant

τ :

time response of the fibre

f :

fibre

g :

gas

∞ :

surroundings

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Authors and Affiliations

  1. Dépt. d'Etudes et de Recherches en Mécanique et Energétique des Systèmes O.N.E.R.A/C.E.R.T., BP 4025, F-31055, Toulouse Cedex, France

    S. Pauzin

  2. Dépt. de Mécanique, U.F.R, M.I.G, Université Paul Sabatier, Route de Narbonne, F-31062, Toulouse, France

    A. Giovannini

  3. Combustion group, Energy & Environment Division, Lawrence Berkeley Laboratory, 94720, Berkeley, CA

    B. Bédat

Authors
  1. S. Pauzin
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  2. A. Giovannini
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  3. B. Bédat
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Part of the financial support of this work is from the French Ministry of Defence, Direction des Recherches, Etudes et Techniques

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Pauzin, S., Giovannini, A. & Bédat, B. Thin filament infrared pyrometry: instantaneous temperature profile measurements in a weakly turbulent hydrocarbon premixed flame. Experiments in Fluids 17, 397–404 (1994). https://doi.org/10.1007/BF01877042

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