Premixed flame flashback in wall boundary layers studied by long-distance micro-PIV

Premixed flame flashback in wall boundary layers studied by long-distance micro-PIV Premixed flame propagation against the main flow direction in wall boundary layers, a situation known as wall flashback, has been studied by long-distance particle image velocimetry with spatial micron resolution (μ-PIV) and simultaneous flame luminescence recordings. Numerical simulations of laminar wall flashback assist the interpretation of the experimental results. Inside a turbulent boundary layer, the flame propagates in discrete flame cusps pointing in upstream direction and showing a well-defined pattern of formation and break-up. In a laminar boundary layer, the leading flame region is smooth and exhibits low curvature. The instantaneous velocity fields reveal a backflow region upstream of the flame during flashback, which is constrained to the leading flame zone. The backflow is caused by an interaction between the pressure increase upstream of the flame and the boundary layer. The flashback limit is controlled by thermal quenching of the flame tip in the backflow region. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Premixed flame flashback in wall boundary layers studied by long-distance micro-PIV

Loading next page...
 
/lp/springer_journal/premixed-flame-flashback-in-wall-boundary-layers-studied-by-long-8CSaSA3tDa
Publisher
Springer-Verlag
Copyright
Copyright © 2011 by Springer-Verlag
Subject
Engineering; Fluid- and Aerodynamics; Engineering Fluid Dynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-011-1226-8
Publisher site
See Article on Publisher Site

Abstract

Premixed flame propagation against the main flow direction in wall boundary layers, a situation known as wall flashback, has been studied by long-distance particle image velocimetry with spatial micron resolution (μ-PIV) and simultaneous flame luminescence recordings. Numerical simulations of laminar wall flashback assist the interpretation of the experimental results. Inside a turbulent boundary layer, the flame propagates in discrete flame cusps pointing in upstream direction and showing a well-defined pattern of formation and break-up. In a laminar boundary layer, the leading flame region is smooth and exhibits low curvature. The instantaneous velocity fields reveal a backflow region upstream of the flame during flashback, which is constrained to the leading flame zone. The backflow is caused by an interaction between the pressure increase upstream of the flame and the boundary layer. The flashback limit is controlled by thermal quenching of the flame tip in the backflow region.

Journal

Experiments in FluidsSpringer Journals

Published: Nov 18, 2011

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off