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Communication Dans Un Congrès Année : 2021

Impact of injector characteristics on combustion instabilities in a swirl-spray combustor

Résumé

The influence of the injection system on combustion instabilities is investigated in this work by making use of systematic experiments with three swirlers having similar geometries, but different pressure losses and swirl numbers. The swirling injectors are tested in a laboratory-scale swirl-stabilized combustor called SICCA-spray that represents one segment of the MICCA-spray annular combustor. Measurements are performed with liquid heptane fuel, delivered as a hollow cone spray by a pressure atomizer. Self-sustained oscillations are examined for the different swirlers by varying the chamber length. Test results show differences in oscillation frequency and oscillation amplitude between the different swirlers. Acoustic damping estimated for each swirler under cold flow conditions reveal their distinct behavior. This, however, is not enough to explain the differences observed in the unstable behavior of the various systems. .
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hal-03832334 , version 1 (27-10-2022)

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  • HAL Id : hal-03832334 , version 1

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Preethi Rajendram Soundararajan, Guillaume Vignat, Daniel Durox, Antoine Renaud, Sébastien Candel. Impact of injector characteristics on combustion instabilities in a swirl-spray combustor. 5e colloque de l'initiative en combustion avancée (INCA), Safran, Apr 2021, Online, France. ⟨hal-03832334⟩
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