Experiments in Fluids

, Volume 17, Issue 6, pp 397–404 | Cite as

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

  • S. Pauzin
  • A. Giovannini
  • B. Bédat
Article

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.

List of symbols

A

area

C, B

temperature coefficient calibration

dL

laminar flame thickness

d

diameter of the fibre

Ffg

form factor

D

exit diameter of burner

h

convective heat coefficient

\(\vec I\)

acoustic intensity vector

lt

integral length scale of turbulence

p

acoustic pressure

Re

Reynolds number

S

surface

T

temperature

u′

root mean square velocity

uL

laminar combustion velocity

U

velocity at the burner exit

\(\vec v\)

acoustic velocity vector without flow

Coordinate symbol

r

radial axis

x

fibre axis

z

axial axis

Greek symbol

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

Subscript

f

fibre

g

gas

surroundings

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Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • S. Pauzin
    • 1
  • A. Giovannini
    • 2
  • B. Bédat
    • 3
  1. 1.Dépt. d'Etudes et de Recherches en Mécanique et Energétique des Systèmes O.N.E.R.A/C.E.R.T.Toulouse CedexFrance
  2. 2.Dépt. de MécaniqueU.F.R, M.I.G, Université Paul SabatierToulouseFrance
  3. 3.Combustion group, Energy & Environment DivisionLawrence Berkeley LaboratoryBerkeley

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