A combination of two common edge detectors is used to obtain a procedure to extract flame fronts from low quality OH-LIF data of premixed flames. The method primarily consists out of a LoG edge detector that uses the Canny edge detector to select the correct edges, based on their overlap. This procedure enables one to extract flame fronts as continuous edges at locations of maximum gradient for low quality OH-LIF data, with SNR as low as 2.7, without the need for user input. The extracted edges can be used to measure, amongst other, flame front curvature. Optimal settings for the parameters involved are determined based on the accuracy and robustness of the method. For this both synthetic and experimental data are used. Although there is some contamination of spurious edges in the set of detected edged (about 1%), the method is able to accurately measure the, for combustion relevant, flame front curvature statistics.
|Publication status||Published - 16 Jun 2013|
|Event||8th World Conference on Experimental Heat Transfer, Fluid Mechanics, and Thermodynamics, ExHFT-8 2013 - Lisbon, Portugal|
Duration: 16 Jun 2013 → 20 Jun 2013
Conference number: 8
|Conference||8th World Conference on Experimental Heat Transfer, Fluid Mechanics, and Thermodynamics, ExHFT-8 2013|
|Period||16/06/13 → 20/06/13|
Verbeek, A. A., Jansen, W., Stoffels, G. G. M., & van der Meer, T. H. (2013). Improved flame front curvature measurements for noisy OH-LIF images. Paper presented at 8th World Conference on Experimental Heat Transfer, Fluid Mechanics, and Thermodynamics, ExHFT-8 2013, Lisbon, Portugal.