Non-equilibrium kinetics of the ground and excited states in N2–O2 under nanosecond discharge conditions: extended scheme and comparison with available experimental observations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F18%3A00495434" target="_blank" >RIV/61389021:_____/18:00495434 - isvavai.cz</a>

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.1088/1361-6463/aadcd1" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6463/aadcd1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6463/aadcd1" target="_blank" >10.1088/1361-6463/aadcd1</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Non-equilibrium kinetics of the ground and excited states in N2–O2 under nanosecond discharge conditions: extended scheme and comparison with available experimental observations

Popis výsledku v původním jazyce

A numerical 0-D kinetic model is developed here to simulate the detailed kinetics of the ground and excited electronic states of atmospheric gases occurring under streamer discharge conditions. The model is based on an extended kinetic scheme that involves state-to-state vibrational kinetics of the ground electronic states of N2, O2 and NO diatomics, including e-V, V-V and V-T energy transfers, and contains about 10000 processes for more than 500 tracked state-specific species (including the higher excited and autoionising states of NI/OI atomic species), and also for state-non-specific species. This scheme takes into account the most important radiative processes occurring in N2 and N2-O2 mixtures that are of diagnostic interest, including the extreme ultraviolet and vacuum ultraviolet radiation produced by many excited and autoionising states of NI/OI. The dependence of the rates of electron impact processes on the reduced electric field E/N is found by solving the Boltzmann equation for electrons in the two-term approximation using the BOLtzmann equation solver Open Source library (BOLOS). We examine several test cases: pure nitrogen at 50 and 200 torr and synthetic air at 10, 50 and 760 torr, at a gas temperature of 300 K. The numerical results for pure nitrogen were compared with experimental results recently obtained by LIF for N2(A3Su+) metastables. Good qualitative agreement was observed between numerical simulations and experiments at vibronic levels v=2–5, giving important feedback on the appropriateness of the kinetic scheme. Numerical results were also used to find several general spectrometric signatures that might be helpful in the development of diagnostic procedures.

Název v anglickém jazyce

Non-equilibrium kinetics of the ground and excited states in N2–O2 under nanosecond discharge conditions: extended scheme and comparison with available experimental observations

Popis výsledku anglicky

A numerical 0-D kinetic model is developed here to simulate the detailed kinetics of the ground and excited electronic states of atmospheric gases occurring under streamer discharge conditions. The model is based on an extended kinetic scheme that involves state-to-state vibrational kinetics of the ground electronic states of N2, O2 and NO diatomics, including e-V, V-V and V-T energy transfers, and contains about 10000 processes for more than 500 tracked state-specific species (including the higher excited and autoionising states of NI/OI atomic species), and also for state-non-specific species. This scheme takes into account the most important radiative processes occurring in N2 and N2-O2 mixtures that are of diagnostic interest, including the extreme ultraviolet and vacuum ultraviolet radiation produced by many excited and autoionising states of NI/OI. The dependence of the rates of electron impact processes on the reduced electric field E/N is found by solving the Boltzmann equation for electrons in the two-term approximation using the BOLtzmann equation solver Open Source library (BOLOS). We examine several test cases: pure nitrogen at 50 and 200 torr and synthetic air at 10, 50 and 760 torr, at a gas temperature of 300 K. The numerical results for pure nitrogen were compared with experimental results recently obtained by LIF for N2(A3Su+) metastables. Good qualitative agreement was observed between numerical simulations and experiments at vibronic levels v=2–5, giving important feedback on the appropriateness of the kinetic scheme. Numerical results were also used to find several general spectrometric signatures that might be helpful in the development of diagnostic procedures.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

<a href="/cs/project/GA15-04023S" target="_blank" >GA15-04023S: Pokročilý výzkum kinetických procesů ve streamerových výbojích</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physics D-Applied Physics

ISSN

0022-3727

e-ISSN

—

Svazek periodika

51

Číslo periodika v rámci svazku

50

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

26

Strana od-do

504004

Kód UT WoS článku

000448153600002

EID výsledku v databázi Scopus

2-s2.0-85055509228