特集—超臨界燃焼
超臨界圧力におけるLOX/GH2同軸噴流火炎のLarge-Eddy Simulation
キーワード:
Cryogenic rocket combustion,
Supercritical pressure,
Large-eddy simulation,
Shear-coaxial jet flame
2015 年 57 巻 182 号 p. 265-273
詳細
2015 年 57 巻 182 号 p. 265-273
In this article, large-eddy simulation (LES) is conducted for a liquid oxygen (LOX) and gaseous hydrogen (GH2) shear-coaxial jet flame at supercritical pressure. In this LES framework, the laminar flamelet approach is employed for turbulent combustion modeling, and the real-fluid thermodynamics and transport are considered. The present LES framework is applied for simulating LOX/GH2 combustion experiment under supercritical pressure (6 MPa), which is conducted by the high-pressure test facility P8 at DLR Lampoldshausen. By analyzing the obtained LES results, the flowfield features of a cryogenic shear-coaxial jet flame are explored. The integral length scales of turbulent coherent structures are calculated from the present LES framework and show fair agreement when compared with available experimental data. The effects of the numerical dissipations inherent in interpolation schemes are also investigated and recommendations are provided for future studies.
