Computations Of High-speed Turbulent Reacting Flows

Super/Hyper-sonic flights possess significant value for military and civil usage inthe future. The progress of high-speed aircrafts is hindered for long due to the slowdevelopment of its propulsion system—-the scramjets. Since the flow field insidea scramjet is extremely complicated, both the theoretical and practical researches areconfronted with great challenges. Except for its individual drawbacks of ground tunneltests or flight tests, tools of CFD are playing an increasingly important role in theaeronautical industry and realm of research, and it does show its excellent potential inthe simulation of the flow field in a scramjet.In this study, we start from the characteristics of the flow field in a scramjet andthen obtain a typical physical model, i.e. high-speed turbulent reacting flows. Sub-sequently, by introducing new computational approaches accounting for the chemi-cal non-equilibrium as well as new turbulence models considering the turbulent heattransfer and mass diffusion, accurate and high-efficient numerical computations ofhigh-speed turbulent reacting flows can be reached.With the verification and validation of numerical experiments carried out for sev-eral typical flow fields which share the same characteristics with scramjets, both high-efficiency of the new solver for chemical reacting systems and the effectiveness of thenew turbulence model in predicting heat transfer and mass diffusion can be promised.At last, this study furthermore investigates several new numerical schemes and com-putational models that may be used in the future simulation of scramjets, potential andapplicable value are shown accordingly.