Numerical Analysis of Thermochemical Nonequilibrium Flows in a Model Scramjet Engine

Seoeum Han, Sangyoon Lee and Bok Jik Lee
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Seoeum Han: Interdisciplinary Program in Space System, Seoul National University, Seoul 08826, Korea
Sangyoon Lee: Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 08826, Korea
Bok Jik Lee: Institute of Advanced Aerospace Technology, Seoul National University, Seoul 08826, Korea

Energies, 2020, vol. 13, issue 3, 1-17

Abstract: This numerical study was conducted to investigate the flow properties in a model scramjet configuration of the experiment in the T4 shock tunnel. In most numerical simulations of flows in shock tunnels, the inflow conditions in the test section are determined by assuming the thermal equilibrium of the gas. To define the inflow conditions in the test section, the numerical simulation of the nozzle flow with the given nozzle reservoir conditions from the experiment is conducted by a thermochemical nonequilibrium computational fluid dynamics (CFD) solver. Both two-dimensional (2D) and three-dimensional (3D) numerical simulations of the flow in a model scramjet were conducted without fuel injection. Simulations were performed for two types of inflow conditions: one for thermochemical nonequilibrium states obtained from the present nozzle simulation and the other for the data available using the thermal equilibrium and chemical nonequilibrium assumptions. The four results demonstrate the significance of the modelling approach for choosing between 2D or 3D, and thermal equilibrium or nonequilibrium.

Keywords: scramjet engine; thermochemical nonequilibrium; hypersonic flow; shock tunnel (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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