Simulation of the GOx/GCH4 Multi-Element Combustor Including the Effects of Radiation and Algebraic Variable Turbulent Prandtl Approaches

Evgenij Strokach, Igor Borovik and Oscar Haidn
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Evgenij Strokach: Institute No. 2 “Aviation, rocket engines and power plants”, Moscow Aviation Institute, Volokolamskoe shosse 4, Moscow 125993, Russia
Igor Borovik: Institute No. 2 “Aviation, rocket engines and power plants”, Moscow Aviation Institute, Volokolamskoe shosse 4, Moscow 125993, Russia
Oscar Haidn: Department of Aerospace and Geodesy, Technical University of Munich, Boltzmannstr. 15, 85748 Garching b. Munich, Germany

Energies, 2020, vol. 13, issue 19, 1-22

Abstract: Multi-element thrusters operating with gaseous oxygen (GOX) and methane (GCH4) have been numerically studied and the results were compared to test data from the Technical University of Munich (TUM). A 3D Reynolds Averaged Navier–Stokes Equations (RANS) approach using a 60° sector as a simulation domain was used for the studies. The primary goals were to examine the effect of the turbulent Prandtl number approximations including local algebraic approaches and to study the influence of radiative heat transfer (RHT). Additionally, the dependence of the results on turbulence modeling was studied. Finally, an adiabatic flamelet approach was compared to an Eddy-Dissipation approach by applying an enhanced global reaction scheme. The normalized and absolute pressures, the integral and segment averaged heat flux were taken as an experimental reference. The results of the different modeling approaches were discussed, and the best performing models were chosen. It was found that compared to other discussed approaches, the BaseLine Explicit Algebraic Reynolds Stress Model (BSL EARSM) provided more physical behavior in terms of mixing, and the adiabatic flamelet was more relevant for combustion. The effect of thermal radiation on the wall heat flux (WHF) was high and was strongly affected by spectral models and wall thermal emissivity. The obtained results showed good agreement with the experimental data, having a small underestimation for pressures of around 2.9% and a good representation of the integral wall heat flux.

Keywords: combustor; turbulent Prandtl approaches; Navier–Stokes simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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