English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Flame front tracking in turbulent lean premixed flames using stereo PIV and time-sequenced planar LIF of OH

MPS-Authors
/persons/resource/persons201102

Kaminski,  C. F.
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Hartung, G., Hult, J., Balachandran, R., Mackley, M. R., & Kaminski, C. F. (2009). Flame front tracking in turbulent lean premixed flames using stereo PIV and time-sequenced planar LIF of OH. APPLIED PHYSICS B-LASERS AND OPTICS, 96(4), 843-862. doi:10.1007/s00340-009-3647-0.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6BB5-A
Abstract
This paper describes the simultaneous application of time-sequenced laser-induced fluorescence imaging of OH radicals and stereoscopic particle image velocimetry for measurements of the flame front dynamics in lean and premixed LP turbulent flames. The studied flames could be acoustically driven, to simulate phenomena important in LP combustion technologies. In combination with novel image post processing techniques we show how the data obtained can be used to track the flame front contour in a plane defined by the illuminating laser sheets. We consider effects of chemistry and convective fluid motion on the dynamics of the observed displacements and analyse the influence of turbulence and acoustic forcing on the observed contour velocity, a quantity we term as s (d) (2D) . We show that this quantity is a valuable and sensitive indicator of flame turbulence interactions, as (a) it is measurable with existing experimental methodologies, and (b) because computational data, e.g. from large eddy simulations, can be post processed in an identical fashion. s (d) (2D) is related (to a two-dimensional projection) of the three-dimensional flame displacement speed s (d) , but artifacts due to out of plane convective motion of the flame surface and the uncertainty in the angle of the flame surface normal have to be carefully considered. Monte Carlo simulations were performed to estimate such effects for several distributions of flame front angle distributions, and it is shown conclusively that s (d) (2D) is a sensitive indicator of a quantity related to s (d) in the flames we study. s (d) (2D) was shown to increase linearly both with turbulent intensity and with the amplitude of acousting forcing for the range of conditions studied.