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Communication Dans Un Congrès Année : 2016

Experimental and numerical investigation of direct and indirect combustion noise contributions in a lean premixed laboratory swirled combustor

Résumé

Combustors are contributing to the core noise emission of aero-engines in terms of direct and indirect combustion noise. The first is caused by the unsteady heat release rate, the second by the acceleration of inflow inhomogeneities, such as entropy fluctuations, at the combustor outlet or in the turbine. This work aims to investigate combustion noise generation mechanisms of a choked laboratory scale combustor by a combined experimental and numerical study. Therefore, the temperature fluctuations at the combustor outlet were determined experimentally as well as numerically and cross-checked together with pressure and OH* emission data in the frequency domain. A similar spectral content was found. Furthermore, the acoustic and entropy fluctuations at the combustion chamber outlet were evaluated for different operation conditions to estimate the direct and indirect combustion noise contributions of a laboratory combustor.

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Dates et versions

hal-01863986 , version 1 (13-08-2021)

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Nancy Kings, Wenjie Tao, Philippe Scouflaire, Franck Richecoeur, Sebastien Ducruix. Experimental and numerical investigation of direct and indirect combustion noise contributions in a lean premixed laboratory swirled combustor. ASME Turbo Expo: Turbine Conference and Exposition, Jun 2016, Seoul, South Korea. pp.GT2016-57848, ⟨10.1115/gt2016-57848⟩. ⟨hal-01863986⟩
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