Thermoacoustic Instabilities & Autoignition in Hydrogen-Powered CPSCs: Insights from High-Speed OH* Chemiluminescence
This study investigates the interaction between thermoacoustic instabilities and autoignition kernel formation in Constant Pressure Sequential Combustors (CPSCs) fueled by both a methane–hydrogen blend and pure hydrogen. The research highlights how increasing the thermal power leads to distinct instability patterns in each fuel configuration, with noticeable differences in acoustic pressure spectra and chemiluminescence during instability. […]
Experimental Investigation of Soot Production and Oxidation in a Lab-Scale Rich–Quench–Lean (RQL) Burner
This research investigates soot emissions in swirl-stabilized, turbulent, non-premixed ethylene–air flames at atmospheric pressure. The study focuses on how varying the velocity and location of the dilution air jets affects soot production, with a constant global equivalence ratio at 0.3. The findings reveal that dilution air effectively mitigates soot formation, reduces fuel penetration lengths, and […]
CH3 Imaging via Photo-Fragmentation Combined with CH Planar Laser-Induced Fluorescence Employing C–X (0,0) Band Excitation and Detection
This research demonstrates advanced imaging techniques for the methyl (CH3) radical using a single-shot approach with a laser system. By harnessing CH3 photo-fragmentation and CH detection, it reveals insights into flame diagnostics across various conditions, such as premixed laminar and turbulent flames, and a methane lifted jet diffusion flame. The proposed method offers the versatility […]
Structure and Stabilization Mechanisms of an Ethylene-Air Flame in Supersonic Co-Flow
This study investigates the structure and stabilization of a recirculation-stabilized ethylene-air flame in a supersonic co-flow. It involves combustion science and aims to understand the roles of fuel jet momentum and flame dynamics in maintaining combustion stability. The researchers employed OH Planar Laser-Induced Fluorescence (PLIF) and high-speed chemiluminescence imaging to capture flame dynamics. The focal […]