Advanced Laser Diagnostics for Flame Wall Interaction

Abstract

Flame quenching resulting from flame-wall interactions (FWIs) is important in several thermochemical processes of practical relevance, such as internal combustion engines. Even though FWIs are restricted to regions close to walls of a combustion chamber, they are crucial for wall heat fluxes and unburned hydrocarbon emissions. This review starts with the discussion about the role of laser diagnostics in FWIs. Following a description of current understanding of FWIs, the focus is on applying optical diagnostics to investigate parametric sensitivities that influence flame quenching at walls and to better understand the influence of non-adiabaticity upon the thermo-chemical states in FWIs. The review closes with a discussion of issues and implications for future experimental researches.