The modeling of hypersonic entry of meteoroids in the Earth's atmosphere in ablative regimes needs the characterization of the thermodynamics and transport properties of the plasma formed in the shock layer and including the ablated species. In this chapter a parametric investigation is performed, deriving the equilibrium composition and properties by using the EquilTheTA tool, considering different ratios of silicon and air components from pure SiO2 and SiC to air plasmas. The core databases of EquilTheTA have been extended to include the internal partition functions of atomic and molecular silicon species, and for collision integrals describing the interactions involving silicon species, adopting a hybrid multi-potential/phenomenological approach and accounting for the resonant charge-exchange processes.
Thermodynamic and transport properties of reacting air including ablated species
Fernando Pirani;
2019
Abstract
The modeling of hypersonic entry of meteoroids in the Earth's atmosphere in ablative regimes needs the characterization of the thermodynamics and transport properties of the plasma formed in the shock layer and including the ablated species. In this chapter a parametric investigation is performed, deriving the equilibrium composition and properties by using the EquilTheTA tool, considering different ratios of silicon and air components from pure SiO2 and SiC to air plasmas. The core databases of EquilTheTA have been extended to include the internal partition functions of atomic and molecular silicon species, and for collision integrals describing the interactions involving silicon species, adopting a hybrid multi-potential/phenomenological approach and accounting for the resonant charge-exchange processes.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
