The present work focuses on the verification and validation of new mathematical and numerical tools which have been specifically developed to face combustion instability problems, using a low-order approach. In the low-order framework, flow field is computed using an Eulerian set of equations for three species, namely oxidizer, fuel and combustion products mixtures. A simplified real fluid equation of state is adopted, capable of handling a hybrid mixture of ideal and real fluids, so that the cooler oxidizer can be described as a real fluid, while hotter species can be approximated as ideal gases, in order to simplify computations. Mentioned models are embedded into an in-house solver. Verification and validation of the new code against wave propagation problems are then performed, showing good agreement.

A Hybrid Real/Ideal Gas Mixture Model in the Framework of Low Order Modeling of Combustion Instability / D'Alessandro, Simone; Zolla, Paolo Maria; Pizzarelli, Marco; Favini, Bernardo; Nasuti, Francesco. - (2021). (Intervento presentato al convegno 2021 AIAA Propulsion and Energy Forum tenutosi a Evento Virtuale) [10.2514/6.2021-3623].

A Hybrid Real/Ideal Gas Mixture Model in the Framework of Low Order Modeling of Combustion Instability

D'Alessandro, Simone
Primo
;
Zolla, Paolo Maria
Secondo
;
Pizzarelli, Marco;Favini, Bernardo
Penultimo
;
Nasuti, Francesco
Ultimo
2021

Abstract

The present work focuses on the verification and validation of new mathematical and numerical tools which have been specifically developed to face combustion instability problems, using a low-order approach. In the low-order framework, flow field is computed using an Eulerian set of equations for three species, namely oxidizer, fuel and combustion products mixtures. A simplified real fluid equation of state is adopted, capable of handling a hybrid mixture of ideal and real fluids, so that the cooler oxidizer can be described as a real fluid, while hotter species can be approximated as ideal gases, in order to simplify computations. Mentioned models are embedded into an in-house solver. Verification and validation of the new code against wave propagation problems are then performed, showing good agreement.
2021
2021 AIAA Propulsion and Energy Forum
low-order modeling; real fluid; wave propagation; equation of state; Riemann solver; liquid rocket engines; combustion instability; thermo-acoustics
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
A Hybrid Real/Ideal Gas Mixture Model in the Framework of Low Order Modeling of Combustion Instability / D'Alessandro, Simone; Zolla, Paolo Maria; Pizzarelli, Marco; Favini, Bernardo; Nasuti, Francesco. - (2021). (Intervento presentato al convegno 2021 AIAA Propulsion and Energy Forum tenutosi a Evento Virtuale) [10.2514/6.2021-3623].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1569482
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