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- W2063840303 abstract "Aircraft noise is composed of contributions from various source mechanisms. Fan noise propagates through engine intake and bypass ducts and is radiated to the far field. Fan noise is one of major contributors to aircraft noise at take-off and landing. The capability of accurately predicting the propagation, attenuation and radiation of fan noise is crucial for acoustic design of the intake and liners, and consequently for realising quieter aircraft. In this study, numerical and analytical models are applied to predicting the fan noise propagation through and radiation from a fan rig intake. Predictions are compared to test data. The predictions are based on those obtained by using Computational AeroAcoustic code ACTRAN/TM which is a linear analysis code and solves the convected Helmholtz equation. The code has been widely used for predicting this type of problems but the degree of agreement between its solutions and measured data depends on individual cases. There are many factors contributing to the accuracy of prediction models and also issues regarding measurements. Although it is not practical to incorporate all aspects in a prediction model, complementing a computational model with some physics such as non-linear effects evaluated separately by using analytical model can provide improvements. This report deals with such a combined approach. The focus is on predicting the in-duct and near-field noise." @default.
- W2063840303 created "2016-06-24" @default.
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- W2063840303 date "2013-05-24" @default.
- W2063840303 modified "2023-09-25" @default.
- W2063840303 title "Prediction of in-duct and near-field noise for a fan rig intake" @default.
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- W2063840303 doi "https://doi.org/10.2514/6.2013-2022" @default.
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