Retrofit Measures for Aircraft Noise Reduction: Simulation Benchmark and Impact Assessment

What is it about?

Low-noise retrofit measures to reduce the noise generation of conventional mid-range transport aircraft have been developed at DLR. The measures are installed on board of the DLR testbed ATRA and extensively flight tested. Initial simulation models have been derived from the results and previous component simulations and windtunneltests to account for the new reduction measures. This paper presents the developed measures as selected for the flight test campaigns. An overview of the conducted flight tests is provided. The overall noise simulation process including aircraft and engine design, flight simulation, and noise prediction is presented. Simulation results obtained from this process are then compared to the measured levels from the flight campaigns.

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