NDLI: Experimental and Numerical Investigation of Direct and Indirect Combustion Noise Contributions in a Lean Premixed Laboratory Swirled Combustor

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Kings, Nancy Tao, Wenjie Scouflaire, Philippe Richecoeur, Franck Ducruix, Sébastien
Copyright Year	2016
Abstract	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.
Sponsorship	International Gas Turbine Institute
File Format	PDF
ISBN	9780791849767
DOI	10.1115/GT2016-57848
Volume Number	Volume 4B: Combustion, Fuels and Emissions
Conference Proceedings	ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition
Language	English
Publisher Date	2016-06-13
Publisher Place	Seoul, South Korea
Access Restriction	Subscribed
Subject Keyword	Temperature Combustion Entropy Acoustics Aircraft engines Pressure Emissions Noise (sound) Heat Fluctuations (physics) Combustion chambers Inflow Turbines
Content Type	Text
Resource Type	Article

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