Ancelin ROCAMORA, Fabien THOLIN, Aymeric BOURLET, Julien LABAUNE, Christophe LAUX

DOI Number: 10.60853/d15h-td86

Conference number: HiSST-2024-00239

The scramjet engine has been developed to reach high Mach number flight. However, supersonic combustion is difficult to initiate and strengthen in a reasonable engine size. Using PAC (Plasma Assisted Combustion) is one possibility to stabilize the combustion. This article is dedicated to a particular plasma technology: the DC (Direct Current) gilding arc. It enables a temperature deposit of about 10 000 K in the mixing zone, and has been studied in the S. B. Leonov configuration called PIM for “Plasma Injector Module”. In this work, numerical simulations of PIM plasma modules have been performed to compare with the experimental results of S. B. Leonov. Two codes are coupled to solve the fluid mechanics and the electric field equations respectively. A macroscopic plasma model developed by A. Bourlet has been used to consider the restrike phenomenon with a reasonable time step and mesh size. The chemical equations are adapted from the skeletal scheme from J. Jachimowsky to overtake the 3 000 K in the arc-heart. The influence of the electric arc by heating and mixing on the combustion ignition is shown, as well as on the coupling between arc and flow.

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