Abstract

Info

Author(s):: DU Fei-ping¹; TAN Yong-hua²; CHEN Jian-hua¹; 1. Xi’an Aerospace Propulsion Institute, Xi’an 710100, China;

Keywords:: hypersonic combustion chamber; one-dimensional flow field simulation; three-dimensional flow field simulation

Abstract:: The 1D and 3D numerical simulations of the coupled flow field with high-speed flow and combustion in a hypersonic combustion chamber are carried out, by which the flow nature and the relationship between parameters are enunciated. The characteristic of 1D flow field in the hypersonic combustion chamber is elaborated. The one-dimensional flow model is analyzed to obtain the formula of the core flow area. The one-dimensional flow model applied to the actual supersonic chamber was compared with the experimental data. It is found that the error is less than 5%. The optimal model was selected by the comparison and analysis. Since one-dimensional numerical simulation can only simulate the variation law of the axial 1D parameters but can not adequately reflect the parameter distribution of the hypersonic combustion flow field, and the fuel injection can not be completely simulated in 2D calculation, 3D NS equation numerical simulation is conducted to obtain the detailed flow field parameters. The one step reaction model was considered in the calculation. The calculated error of the non-adiabatic reattachment stage is less than 2%. It meets the accuracy requirements. The eventual results show that 3D numerical simulation can reflecte the flowpath of the hypersonic combustion chamber, and make up the short of 1D model.