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- W2322293670 abstract "Combustion noise may become an important noise source if not well understood in the design stage of lean burn gas turbine combustors. This work aims to predict the combustion noise source and broadband spectrum for a real aeroengine combustor, which has rarely been reported in past studies, and to compare with measured noise data on a demonstrator aeroengine. A spatial-temporal correlation model of fluctuating heat release rate is developed by analysing recent results of turbulent DNS V-flames, and the aeroengine combustor flow is calculated using RANS. A low-order linear network model is applied to the demonstrator aeroengine combustor to obtain the transfer function relating the heat release and acoustic fluctuations. The initial results for a low-medium power setting indicate that the prediction model captures the main characteristics of the broadband spectral shape of combustion noise but underestimates the spectral level. Empirical length and time scales in the correlation model are hence employed to obtain good agreement with the measured spectral level. Further work is underway to improve the model in predicting the combustion noise level." @default.
- W2322293670 created "2016-06-24" @default.
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- W2322293670 date "2011-06-05" @default.
- W2322293670 modified "2023-09-26" @default.
- W2322293670 title "Prediction of Noise Source for an Aeroengine Combustor" @default.
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- W2322293670 doi "https://doi.org/10.2514/6.2011-2913" @default.
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