Cold-State Investigation on a Flame Holder ()
Abstract
Slitty bluff body is widely used as a
high-performance flame holder in power industry. To understand the flame
stability mechanism, the evolution of the near wake over a slitty bluff body in
cold state was numerically investigated using the renormalization group (RNG)
k-ε model at Reynolds number of 470,000.
The coherent structure of the near wake was identified by the vortex shedding
simulation. To explain the vortex shedding, a mechanism that single vortex of
large size suddenly immerses two shear layers was proposed. To quantitatively
compare the near wakes at different gap ratio, a vortex shedding character
dimension was first proposed. This character dimension has positive correlation
with flame stability. Particle-image velocimetry (PIV) measurements in a close
wind tunnel were also carried out to confirm the observation from the numerical
study. The evidence shows that the numerical results are of good agreement with
the cold-state experiments.
Share and Cite:
Du, Y. (2013) Cold-State Investigation on a Flame Holder.
Journal of Power and Energy Engineering,
1, 45-50. doi:
10.4236/jpee.2013.17008.
Conflicts of Interest
The authors declare no conflicts of interest.
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