A diffuse interface Lox/hydrogen transcritical flame model |
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Authors: | Pierre Gaillard Lionel Matuszewski |
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Institution: | ONERA DEFA, Palaiseau, France |
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Abstract: | We present a diffuse-interface all-pressure flame model that transitions smoothly between subcritical and supercritical conditions. The model involves a non-equilibrium liquid/gas diffuse interface of van der Waals/Korteweg type embedded into a non-ideal multicomponent reactive fluid. The multicomponent transport fluxes are evaluated in their thermodynamic form in order to avoid singularities at thermodynamic mechanical stability limits. The model also takes into account condensing liquid water in order to avoid thermodynamic chemical instabilities. The resulting equations are used to investigate the interface between cold dense and hot light oxygen as well as the structure of diffusion flames between cold dense oxygen and gaseous-like hydrogen at all pressures, either subcritical or supercritical. |
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Keywords: | supercritical transcritical diffuse interface flame |
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