Simulation of a GOx-GCH4 Rocket Combustor and the Effect of the GEKO Turbulence Model Coefficients
In this study, a single injector methane-oxygen rocket combustor is numerically studied. The simulations included in this study are based on the hardware and experimental data from the Technical University of Munich. The focus is on the recently developed generalized <i>k–ω</i> turbulenc...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
|
| Series: | Aerospace |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2226-4310/8/11/341 |
| _version_ | 1827677753268240384 |
|---|---|
| author | Evgeny Strokach Victor Zhukov Igor Borovik Andrej Sternin Oscar J. Haidn |
| author_facet | Evgeny Strokach Victor Zhukov Igor Borovik Andrej Sternin Oscar J. Haidn |
| author_sort | Evgeny Strokach |
| collection | DOAJ |
| description | In this study, a single injector methane-oxygen rocket combustor is numerically studied. The simulations included in this study are based on the hardware and experimental data from the Technical University of Munich. The focus is on the recently developed generalized <i>k–ω</i> turbulence model (GEKO) and the effect of its adjustable coefficients on the pressure and on wall heat flux profiles, which are compared with the experimental data. It was found that the coefficients of ‘jet’, ‘near-wall’, and ‘mixing’ have a major impact, whereas the opposite can be deduced about the ‘separation’ parameter Csep, which highly influences the pressure and wall heat flux distributions due to the changes in the eddy-viscosity field. The simulation results are compared with the standard <i>k–ε</i> model, displaying a qualitatively and quantitatively similar behavior to the GEKO model at a Csep equal to unity. The default GEKO model shows a stable performance for three oxidizer-to-fuel ratios, enhancing the reliability of its use. The simulations are conducted using two chemical kinetic mechanisms: Zhukov and Kong and the more detailed RAMEC. The influence of the combustion model is of the same order as the influence of the turbulence model. In general, the numerical results present a good or satisfactory agreement with the experiment, and both GEKO at Csep = 1 or the standard <i>k–ε</i> model can be recommended for usage in the CFD simulations of rocket combustion chambers, as well as the Zhukov–Kong mechanism in conjunction with the flamelet approach. |
| first_indexed | 2024-03-10T05:48:17Z |
| format | Article |
| id | doaj.art-9e1c94f5edcb4b8b945cb7683e7eec6f |
| institution | Directory Open Access Journal |
| issn | 2226-4310 |
| language | English |
| last_indexed | 2024-03-10T05:48:17Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Aerospace |
| spelling | doaj.art-9e1c94f5edcb4b8b945cb7683e7eec6f2023-11-22T21:57:55ZengMDPI AGAerospace2226-43102021-11-0181134110.3390/aerospace8110341Simulation of a GOx-GCH4 Rocket Combustor and the Effect of the GEKO Turbulence Model CoefficientsEvgeny Strokach0Victor Zhukov1Igor Borovik2Andrej Sternin3Oscar J. Haidn4Moscow Aviation Institute, National Research University, 125993 Moscow, RussiaGerman Aerospace Center (DLR), Institute of Space Propulsion, 74239 Hardhausen, GermanyMoscow Aviation Institute, National Research University, 125993 Moscow, RussiaInstitute of Turbomachinery and Flight Propulsion, Technical University of Munich, 80333 Garching, GermanyInstitute of Turbomachinery and Flight Propulsion, Technical University of Munich, 80333 Garching, GermanyIn this study, a single injector methane-oxygen rocket combustor is numerically studied. The simulations included in this study are based on the hardware and experimental data from the Technical University of Munich. The focus is on the recently developed generalized <i>k–ω</i> turbulence model (GEKO) and the effect of its adjustable coefficients on the pressure and on wall heat flux profiles, which are compared with the experimental data. It was found that the coefficients of ‘jet’, ‘near-wall’, and ‘mixing’ have a major impact, whereas the opposite can be deduced about the ‘separation’ parameter Csep, which highly influences the pressure and wall heat flux distributions due to the changes in the eddy-viscosity field. The simulation results are compared with the standard <i>k–ε</i> model, displaying a qualitatively and quantitatively similar behavior to the GEKO model at a Csep equal to unity. The default GEKO model shows a stable performance for three oxidizer-to-fuel ratios, enhancing the reliability of its use. The simulations are conducted using two chemical kinetic mechanisms: Zhukov and Kong and the more detailed RAMEC. The influence of the combustion model is of the same order as the influence of the turbulence model. In general, the numerical results present a good or satisfactory agreement with the experiment, and both GEKO at Csep = 1 or the standard <i>k–ε</i> model can be recommended for usage in the CFD simulations of rocket combustion chambers, as well as the Zhukov–Kong mechanism in conjunction with the flamelet approach.https://www.mdpi.com/2226-4310/8/11/341GEKO turbulence modelmethane rocket enginewall heat fluxsingle coaxial injectorRAMEC mechanismZhukov-Kong mechanism |
| spellingShingle | Evgeny Strokach Victor Zhukov Igor Borovik Andrej Sternin Oscar J. Haidn Simulation of a GOx-GCH4 Rocket Combustor and the Effect of the GEKO Turbulence Model Coefficients Aerospace GEKO turbulence model methane rocket engine wall heat flux single coaxial injector RAMEC mechanism Zhukov-Kong mechanism |
| title | Simulation of a GOx-GCH4 Rocket Combustor and the Effect of the GEKO Turbulence Model Coefficients |
| title_full | Simulation of a GOx-GCH4 Rocket Combustor and the Effect of the GEKO Turbulence Model Coefficients |
| title_fullStr | Simulation of a GOx-GCH4 Rocket Combustor and the Effect of the GEKO Turbulence Model Coefficients |
| title_full_unstemmed | Simulation of a GOx-GCH4 Rocket Combustor and the Effect of the GEKO Turbulence Model Coefficients |
| title_short | Simulation of a GOx-GCH4 Rocket Combustor and the Effect of the GEKO Turbulence Model Coefficients |
| title_sort | simulation of a gox gch4 rocket combustor and the effect of the geko turbulence model coefficients |
| topic | GEKO turbulence model methane rocket engine wall heat flux single coaxial injector RAMEC mechanism Zhukov-Kong mechanism |
| url | https://www.mdpi.com/2226-4310/8/11/341 |
| work_keys_str_mv | AT evgenystrokach simulationofagoxgch4rocketcombustorandtheeffectofthegekoturbulencemodelcoefficients AT victorzhukov simulationofagoxgch4rocketcombustorandtheeffectofthegekoturbulencemodelcoefficients AT igorborovik simulationofagoxgch4rocketcombustorandtheeffectofthegekoturbulencemodelcoefficients AT andrejsternin simulationofagoxgch4rocketcombustorandtheeffectofthegekoturbulencemodelcoefficients AT oscarjhaidn simulationofagoxgch4rocketcombustorandtheeffectofthegekoturbulencemodelcoefficients |