TITLE:
Turbulent Flowfield Analysis in a Bluff-Body Burner Using PIV
AUTHORS:
Nattan Roberto Caetano, Flávio Tadeu van der Laan
KEYWORDS:
Particle Image Velocimetry; Turbulent Flowfield; Experimental Uncertainty; Boussinesq Hypothesis
JOURNAL NAME:
World Journal of Mechanics,
Vol.3 No.4,
July
10,
2013
ABSTRACT: The structure of inert turbulent flows, stabilized in a Bluff-Body
burner, is studied considering different volumetric flows for Nitrogen jet and
annular air in coflow configuration. Flowfield analysis on Bluff-Body burner is
essential to improve the knowledge about this burner, which plays an important
role in industrial applications. Thus, vector velocity field is performed,
employing Particle Image Velocimetry technique. Also, an uncertainty analysis
is performed considering parameters involved in this technique yielding 6%
to velocity measurements. The acquired information produces the results based
in flowfield structure, which are presented in terms of statistical momentum
and Reynolds stress, in which Boussinesq Hypothesis is considered to
incompressible flows. However, this hypothesis fails in certain conditions.
In this way, is possible to comprehend and provide experimental data from the
turbulent effects on the flowfield and also contribute to predict the
combustion flows, in order to enable the validation and develop numerical
models.