Comparison of Mean Methods Suitable for Radiation Properties Evaluation in CO2/O2 Plasma at Various Pressures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F23%3APU149517" target="_blank" >RIV/00216305:26220/23:PU149517 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of Mean Methods Suitable for Radiation Properties Evaluation in CO2/O2 Plasma at Various Pressures

Popis výsledku v původním jazyce

Evaluation of a radiation energy transfer plays a very important role in numerical simulations of thermal plasma. Unfortunately, a precise radiation evaluation would demand unacceptably huge computation power due to a very complex nature of a radiation propagation and spectral dependence. A simplified methods are thus generally used for both spectral and spatial part of the radiation transfer evaluation with methods such as Net Emission Coefficients (NEC), Mean Absorption Coefficients (MAC), P1 approximation, Discrete Ordinates Method (DOM), k-bands discretization etc. In this contribution, we focus only on a very small part of the entire simulation process, namely on the radiation transfer in the CO2/O2 thermal plasma mixture and its accurate representation in relation to the gas pressure. We show, that for the pressure above 10 bars the Rosseland mean absorption coefficient is the best method while at the low pressure limit the line limited Planck mean absorption coefficient exhibits much better acc

Název v anglickém jazyce

Comparison of Mean Methods Suitable for Radiation Properties Evaluation in CO2/O2 Plasma at Various Pressures

Popis výsledku anglicky

Evaluation of a radiation energy transfer plays a very important role in numerical simulations of thermal plasma. Unfortunately, a precise radiation evaluation would demand unacceptably huge computation power due to a very complex nature of a radiation propagation and spectral dependence. A simplified methods are thus generally used for both spectral and spatial part of the radiation transfer evaluation with methods such as Net Emission Coefficients (NEC), Mean Absorption Coefficients (MAC), P1 approximation, Discrete Ordinates Method (DOM), k-bands discretization etc. In this contribution, we focus only on a very small part of the entire simulation process, namely on the radiation transfer in the CO2/O2 thermal plasma mixture and its accurate representation in relation to the gas pressure. We show, that for the pressure above 10 bars the Rosseland mean absorption coefficient is the best method while at the low pressure limit the line limited Planck mean absorption coefficient exhibits much better acc

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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