A Reduced Set of Air Plasma Reactions for Nanosecond Pulsed Plasmas

作者：Bak Moon Soo^*; Cappelli Mark A

来源：IEEE Transactions on Plasma Science, 2015, 43(4): 995-1001.

DOI：10.1109/TPS.2015.2409300

• Plasma chemistry
• plasma simulation

The reduction of a mechanism describing plasma chemistry for dry air has been carried out for conditions of nanosecond-pulsed discharge plasmas. The discharge conditions include both diffuse glow and filamentary spark modes. A reduced set for glow discharges is found to have inelastic electron-impact reactions of N-2 and O-2, quenching of excited N-2, electron attachment to O-2(-), ion conversion between N-2(+), N-4(+), O-4(+), O-2(+) center dot N-2, and O-2(+), and ion-ion and electron-ion recombination. When the discharge is in a filamentary mode, additional reactions are required beyond those for the glow discharge as a result of the increased electron number density and high levels of molecular dissociation. Those additional reactions include electron-impact excitation of N and O, quenching of excited N-2 by N and O, and associative ionization by collisions between excited N-2. A significant reduction in the number of species and reactions is obtained without compromising the predicted species' number densities and temperature. These results provide researchers with reduced kinetic mechanisms that high-fidelity simulations could rely on to save computational time.

• 出版日期2015-4