Tristan VANYAI, Nicholas GIBBONS

DOI Number: N/A

Conference number: HiSST-2024-295

Correctly simulating the chemical composition in a test flow is a critical element of supersonic combustion experiments. Radicals generated in the stagnation region of a reflected shock tunnel could be seen as a key departure from the flow in flight experiments. However, there is evidence that only considering 5 chemical species in air gas models is artificially inflating the inferred concentration of atomic oxygen, O, in these test flows. By including a 6th species, NO2, the concentration of O is decreased by many orders of magnitude at conditions suitable for testing supersonic combustors. This paper presents comparisons between 5- and 6-species air schemes for simulations of nozzles and subsequent combustion experiments, that indicate the importance of including NO2 in reflected shock tunnel nozzle simulations.

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In Categories: 1.Events, HiSST 2024, Propulsion Systems and Components
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