Near-limit oscillatory behaviors on wick flames of dimethyl carbonate with trimethyl phosphate additions

The near-limit oscillatory behaviors on wick flames of dimethyl carbonate (DMC) with trimethyl phosphate (TMP) additions have been investigated experimentally. experiments were conducted under a burner in conjunction the limiting oxygen concentration test (wick-LOC), and fuels selected as typical examples electrolyte solvents organophosphorus compounds (OPCs) for lithium-ion batteries. oscillating configuration observed into two main characters: side-to-wake or side oscillation side-stabilized flame (full flame) wake wake-stabilized (wake flame). By tracing base movement using 240-fps camera, stable limit cycle oscillations found full cases, while cannot sustain long finally leads to global extinction. With addition TMP DMC, transition from was unstable linear increase frequency significant drop amplitude, performed increased trends both. To clarify dominant mechanism TMP-added oscillations, laminar burning velocities DMC+TMP mixtures calculated at level each flame. weakened speed revealed inadequacy buoyancy-driven mechanisms OPC added wick-flame. Then surface temperature measured adopting special thermocouple arrangement validate thermal-diffusive promotion by addition. Results showed that heat feedback compensated low reactivity provided faster near extinction limit.