Engineering Mechanics

Proceedings Vol. 20 (2014)

ENGINEERING MECHANICS 2014

Copyright © 2014 Brno University of Technology Institute of Solid Mechanics, Mechatronics and Biomechanics

 

Vondál J., Steen M., Tummers M.J.
pages 741 - 744, full text

Flame tracking is important in the study of flame-wall interaction. Based on flame area, stretch angle and flame thickness the wall effect on the flame can be evaluated. The proposed tracking method is based on differences in seeding particle density in unburnt and burnt gases. Particle images are recorded with a high-speed Particle Image Velocimetry (PIV) system that consists of a high speed CMOS camera and high-repetition rate, diode-pumped Nd:YLF laser. The instantaneous flame front is recognizable in the raw PIV images and the key task is to detect it automatically with image processing tools. Interaction with the wall and an unexpected shift of the wall position during the measurements (due to heating) makes this task very challenging. This paper presents a procedure for entire flame front tracking which utilizes generally available image processing tools. Several issues in the measurement of the flame front are highlighted and their solution or elimination is proposed.

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