CFD Analysis of the HyShot II Scramjet Experiments in the HEG Shock Tunnel

Testing of the HyShot II scramjet configuration was carried out in the High Enthalpy Shock Tunnel Goettingen, HEG, of the German Aerospace Center, DLR. Computational fluid dynamics (CFD) is applied to support the analysis of experimental results and for the prediction of the free stream conditions in the HEG test section. Numerical simulations of the flow in the complete HyShot configuration for fuel on and off conditions were performed. This paper describes the laminar and turbulent modeling approaches for the CFD analysis and presents numerical results and their comparison to the experiment for both the HEG nozzle flow and the turbulent reacting flow in the HyShot Scramjet. The practicability of pressure-length scaling was tested by using further numerical analysis. Limits of applicability of this scaling approach were identified and are discussed in this pape