Abstract
The main purpose of this study is to investigate the flame holding mechanism in premixed CH_4 turbulent flame. Chemiluminescent images have been acquired at equivalence ratios of 0.61,0.58 and 0.51,which is near the leanest limit to clarify the anchor point area experimentally. The main focus of this study is the anchor points and shapes of (OH)^*, (CH)^* variations with equivalence ratio. Moreover, the instabilities and fluctuations of combustion were investigated by time series measurement of local of chemiluminescent radical intensities at the anchor points using both FFT and wavelet decomposition.
