Performance and noise trade-offs on a civil airliner with over-the-wing engines
Performance and noise trade-offs on a civil airliner with over-the-wing engines
复制标题
翼上发动机民用客机的性能和噪声权衡
DOI：
10.2514/6.2011-266
复制
发表时间：
2011
影响因子：
5.9
通讯作者：
P. Joseph
中科院分区：
文献类型：
--
作者：
Stephen Powell;A. Sóbester;P. Joseph
社区噪音已成为新飞机设计中的主要考虑因素。发动机产生的噪声在几代人中已经降低到现在需要整个机体方法来实现进一步的显著降低的程度。一种选择是将发动机安装在机翼上，这样机身就可以反射风扇噪音，使地面观察者看不到。然而，除了良好的噪声屏蔽性能之外，发动机的位置还必须满足空气动力学效率标准。我们调查的灵敏度的空气动力学和声学性能指标相对于发动机相对于机翼的位置。更具体地说，我们的贸易阻力计算通过雷诺平均Navier Stokes模拟与噪声屏蔽性能，通过实验获得的比例模型在消声室中进行的测试。这两个指标的替代模型的构建，使他们的帕累托分析的特定情况下，修改后的DLR F6机身几何形状。
Community noise has become a major consideration in the design of new aircraft. The noise generated by the engines has decreased over the generations to the extent that a whole-airframe approach is required now to achieve further significant reductions. One option is to install the engines over the wings so the airframe reflects the fan noise away from on-the-ground observers. However, in addition to good noise shielding performance, the position of the engine also has to satisfy aerodynamic effciency criteria. We investigate the sensitivity of aerodynamic and acoustic performance metrics with respect to the positioning of the engine relative to the wing. More specifically, we trade drag computed via Reynolds-Averaged Navier Stokes simulations versus noise shielding performance, obtained experimentally through scale model tests conducted in an anechoic chamber. Surrogate models of both metrics are constructed, enabling their Pareto analysis on the specific case of a modified DLR F6 airframe geometry.