Numerical simulations of the flow in a GOX/HTPB hybrid rocket engine are carried out with a Reynolds averaged Navier-Stokes solver including detailed gas surface interaction modeling based on mass and energy balances. Fuel pyrolysis and heterogeneous reactions at the nozzle wall are modeled via finite-rate Arrhenius kinetics. Global mechanisms are considered for the gas-phase chemistry for the combustion of 1,3-butadiene in oxygen. Results show the role of the gas-phase chemistry modeling and surface boundary condition modeling on the solution. The coupling between the mixing and combustion processes in the flowfield and the thermochemical erosion of a graphite nozzle is finally discussed, showing the effect of the temperature and chemical species distributions in the wall region as well as the effects of mixture ratio shifting.
Numerical Modeling of Combustion Chamber and Nozzle Flow in HTPB/GOX Hybrid Rocket Motors / Bianchi, Daniele; Betti, Barbara; Nasuti, Francesco. - ELETTRONICO. - (2014), pp. 1-12. (Intervento presentato al convegno Space Propulsion 2014 tenutosi a Colonia, Germania nel 19/5/2014-22/5/2014).
Numerical Modeling of Combustion Chamber and Nozzle Flow in HTPB/GOX Hybrid Rocket Motors
BIANCHI, DANIELE;BETTI, BARBARA;NASUTI, Francesco
2014
Abstract
Numerical simulations of the flow in a GOX/HTPB hybrid rocket engine are carried out with a Reynolds averaged Navier-Stokes solver including detailed gas surface interaction modeling based on mass and energy balances. Fuel pyrolysis and heterogeneous reactions at the nozzle wall are modeled via finite-rate Arrhenius kinetics. Global mechanisms are considered for the gas-phase chemistry for the combustion of 1,3-butadiene in oxygen. Results show the role of the gas-phase chemistry modeling and surface boundary condition modeling on the solution. The coupling between the mixing and combustion processes in the flowfield and the thermochemical erosion of a graphite nozzle is finally discussed, showing the effect of the temperature and chemical species distributions in the wall region as well as the effects of mixture ratio shifting.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
