1. Modeling of turbulence, chemistry, and heat transfer of a rocket nozzle.
- Author
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Kumar, Naveen and Bansal, Ankit
- Subjects
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HEAT radiation & absorption , *HEAT convection , *REACTIVE flow , *PARTICLE swarm optimization , *COMBUSTION products - Abstract
Calculating the composition of the combustion products serves as the starting point for the high-area ratio (HAR) rocket nozzle. The HAR rocket nozzle finds application in next-generation hypersonic vehicles and missiles. The gas dynamics, gas radiation, and turbulence-chemistry interactions (TCI) play a crucial role in simulations of hypersonic turbulent reactive flows through a rocket nozzle. The interaction of turbulence and chemistry leads to random species mixing and enhanced heat transfer. The k-omega shear stress transport (SST) model is employed to calculate the average flow fields. The eddy dissipation concept (EDC) with reduced chemistry is applied to capture the TCI in the nozzle. The spectral properties of H 2 O are calculated using the full spectrum k -distribution (FSK) model in conjunction with the first-order spherical harmonics method. The mass fractions of combustion products obtained from Particle Swarm Optimization (PSO) and Monte Carlo (MC) methods agree well with the Chemical Equilibrium with Applications (CEA) code. The flow fields obtained with the current solver are validated with the published experimental data. A significant rise and fall of 7–8% have been observed in the centerline flow properties when not including the TCI models in the flow solver. The centerline flow fields obtained with different discretization schemes are in good agreement. The radiative heat flux from the H 2 O species is more dominant than the convective. • Calculate the chemical equilibrium composition of product species for the H 2 –O 2 combustion using the Monte Carlo and PSO methods. • Modeling of the hypersonic turbulent reacting flow of a high-area-ratio (HAR) rocket nozzle in OpenFOAM. • Developed and implemented a spectral model to calculate the radiative properties of H 2 O gas in OpenFOAM. • Effects of turbulence-chemistry interactions (TCI) on the flow fields are analyzed. • Radiative and convective heat transfers are more significant near the throat area. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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