Temporal dynamics of femtosecond-TALIF of atomic hydrogen and oxygen in a nanosecond repetitively pulsed discharge-assisted methane–air flame

Species and temperature measurements of methane oxidation in a nanosecond repetitively pulsed discharge.

Speciation and temperature measurements of methane oxidation during a nanosecond repetitively pulsed discharge in a low-temperature flow reactor have been performed. Measurements of temperature and formaldehyde during a burst of pulses were made on a time-dependent basis using tunable diode laser absorption spectroscopy, and measurements of all other major stable species were made downstream of...

Kinetic study of low temperature methane oxidation in a nanosecond repetitively pulsed dielectric barrier discharge

Methane oxidation was investigated in a nanosecond repetitively pulsed dielectric barrier discharge. Quantitative measurements of temperature and product species were performed using tunable diode laser absorption spectroscopy and gas chromatograph sampling. Discrepancies with modelling work revealed uncertainties in the low temperature oxidation reactions, particularly for methyl radical oxida...

Experimental study of the hydrodynamic expansion following a nanosecond repetitively pulsed discharge in air

Electric field measurement in repetitively pulsed nanosecond discharges in a high pressure hydrogen environment

Electric fields of repetitively pulsed nanosecond discharges have been measured from electric-field induced Raman scattering by hydrogen molecules. Especially the temporal evolution of the electric field spatial distribution was recorded. With a high-speed optical emission intensity analysis, it has been found that most ionization events take place within a very short period during an ionizatio...

A ‘frozen electric-field’ approach to simulate repetitively pulsed nanosecond plasma discharges and ignition of hydrogen–air mixtures

High-fidelity modelling of nanosecond repetitively pulsed discharges (NRPDs) is burdened by the multiple time and length scales and large chemistry mechanisms involved, which prohibit detailed analyses and parametric studies. In the present work, we propose a ‘frozen electric-field’ modelling approach to expedite the NRPD simulations without adverse effects on the solution accuracy. First, a bu...