Abstract
To achieve future goals for the reduction of aircraft community noise, it may be necessary to use unconventional engine and wing arrangements. Prediction of the resulting noise benefits cannot be made without taking into account the effect of the configuration on the whole aircraft system, including the impact on the aerodynamics, weights, and systems integration. Systems studies have been conducted that quantify the impact of various configurations on both the performance and noise of the aircraft. In this paper, the results for several systems studies are presented. In one study, a large matrix was assembled for candidate configuration options for a blended wing–body (BWB) aircraft–including engine, inlet, and nozzle types and placement options—and ranked based on prioritization between noise benefits and performance penalties. In another study, a pair of concepts was developed and evaluated with the goal of simultaneously reducing the noise produced and reducing or eliminating the production of harmful chemical emissions. Finally, a BWB configuration was studied to determine the sensitivity of the overall noise to the levels of the various engine and airframe sources, quantify the airframe shielding benefits using experimental data, and explore the effects of wing trailing-edge extensions on the shielding.
Published Version
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