G. Pelletier, N. Fdida, J. Labaune, S. Petit, G. Pilla, A. Vincent, C. Pivard, R. Santagata, M. Scherman

DOI Number: N/A

Conference number: HiSST-2025-026

Reactive Reynolds-Averaged Navier-Stokes (RANS) simulations, using the CEDRE software, were conducted to investigate the combustion behavior resulting from fuel injection through a strut injector into a confined transverse supersonic flow of vitiated air. The corresponding experimental conditions were studied in the LAPCAT-II combustor, operating in the LAERTE facility at the ONERA Palaiseau Research Center. This study examines four distinct operating conditions, characterized by variations in stagnation temperature and equivalence ratio, covering a range from nominal combustion to regimes approaching thermal choking. The first condition serves as a reference case for validating the numerical
methodology, through comparison with various experimental diagnostics, including pressure measurements, reaction zone position via OH* chemiluminescence, shock positions using Schlieren imaging, and single gas temperature measurement by CARS. Additionally, the stabilization mechanism of the flame under this condition is analyzed. The three others are used to study the appearance of thermal choking within the chamber.

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In Categories: 1.Events, 1.HiSST 2025, Propulsion Systems & Components
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