Abstract
ABSTRACT In this paper, detailed simultaneous measurements of the chemiluminescent emission and acoustic pressure of impinging propane diffusion flame on the circular plate at different setup configurations have been carried out using two different techniques; light cell and microphone systems. The purpose of this research is to experimentally characterize the mode and correlate the global Chemiluminescence emissions and acoustic pressure dynamics of impinging diffusion flame jets. The study considers the measurement and analysis of the chemiluminescence emissions and acoustic pressure at different operating conditions including burner diameters and the distance between the impingement plate and burner exit (H/D). This study makes available very detailed power spectra of two simultaneously measured of signals. Moreover, phase space diagrams between two signals have been presented and analysed. The results show that the chemiluminescence and acoustic pressure at just before flame blowout have strong correlations under all operating conditions and the two signals are almost out of phase with approximately of 90 degrees. Care has to be taken in using the chemiluminescent emission and acoustic signals for control of combustion instabilities.