Real-Gas-Flamelet-Model-Based Numerical Simulation and Combustion Instability Analysis of a GH 2 /LO X Rocket Combustor with Multiple Injectors

Won-Sub Hwang, Bu-Kyeng Sung, Woojoo Han, Kang Y. Huh, Bok Jik Lee, Hee Sun Han, Chae Hoon Sohn and Jeong-Yeol Choi
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Won-Sub Hwang: Department of Aerospace Engineering, Pusan National University, Pusan 46241, Korea
Bu-Kyeng Sung: Department of Aerospace Engineering, Pusan National University, Pusan 46241, Korea
Woojoo Han: Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang 37673, Korea
Kang Y. Huh: Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang 37673, Korea
Bok Jik Lee: Institute of Advanced Aerospace Technology, Seoul National University, Seoul 08826, Korea
Hee Sun Han: Department of Mechanical Engineering, Sejong University, Seoul 05006, Korea
Chae Hoon Sohn: Department of Mechanical Engineering, Sejong University, Seoul 05006, Korea
Jeong-Yeol Choi: Department of Aerospace Engineering, Pusan National University, Pusan 46241, Korea

Energies, 2021, vol. 14, issue 2, 1-23

Abstract: A large eddy simulation (LES) and combustion instability analysis are performed using OpenFOAM for the multiple shear-coaxial injector combustor DLR-BKD (in German Deutsches Zentrum für Luft–Brennkammer D, German Aerospace Center–Combustion Chamber D), which is a laboratory-scale combustor operating in a real-gas environment. The Redlich–Kwong–Peng–Robinson equation of state and steady-laminar flamelet model are adopted in the simulation to accurately capture the real-gas combustion effects. Moreover, the stable combustion under the LP4 condition is numerically analyzed, and the characteristics of the combustion flow field are investigated. In the numerical simulation of the combustion instability, the instability is generated by artificially superimposing the 1st transverse standing wave solution on the stable combustion solution. To decompose the combustion instability mode, the dynamic mode decomposition method is applied. Several combustion instability modes are qualitatively and quantitatively identified through contour plots and graphs, and the sustenance process of the limit cycle is investigated.

Keywords: large-eddy simulation (LES); DLR-BKD combustor; Redlich–Kwong–Peng–Robinson equation of state; steady laminar flamelet model; combustion instability (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: 2021
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