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.
CFD analysis of hybrid rocket Flowfields including fuel pyrolysis and nozzle erosion / Bianchi, Daniele; Urbano, Annafederica; Betti, Barbara; Nasuti, Francesco. - STAMPA. - 1:(2013), pp. 415-434. ((Intervento presentato al convegno 49th AIAA/ASME/SAE/ASEE Joint PropulsionConference tenutosi a San Jose, CA nel 14 July 2013 through 17 July 2013 [10.2514/6.2013-3637].
CFD analysis of hybrid rocket Flowfields including fuel pyrolysis and nozzle erosion
BIANCHI, DANIELE;URBANO, ANNAFEDERICA;BETTI, BARBARA;NASUTI, Francesco
2013
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
