Long GAO, Jiangbo PENG, Xin YU, Chaobo YANG, Zhen CAO, Xun YUAN, Wenbei LIU. Spatiotemporal distribution characteristics analysis of local flameout in jet flames based on 5 kHz planar laser-induced fluorescence[J]. Optics and Precision Engineering, 2024, 32(9): 1307
- Optics and Precision Engineering
- Vol. 32, Issue 9, 1307 (2024)
Fig. 1. OH-PLIF experimental setup of jet flame
Fig. 2. Raw image and denoising results
Fig. 3. Principle for vertical sliding window threshold method
Fig. 4. Binary images of different local adaptive threshold methods
Fig. 5. Image processing result of breaks
Fig. 6. Selected time-lapse images for ethylene jet flame
Fig. 7. Cumulative number of breaks versus time
Fig. 8. Correlation between flameout frequency and jet Mach number
Fig. 9. Histograms of mean length of breaks
Fig. 10. Spatial position of local flameout under different injection conditions
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Table 1. Combustion conditions of main jet
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Table 2. Confusion matrix of PLIF image segmentation
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Table 3. Comparison of image segmentation performance of adaptive threshold methods
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