Numerical simulations of the acoustic footprint of propeller / nacelle / wing configurations

为了证明内部SMARTROTOR代码在普惠加拿大公司（P&WC）感兴趣的航空声学问题中的能力，将研究多叶片典型螺旋桨配置的声学足迹。螺旋桨叶片将被认为是薄翼型；板状刚性结构和由压缩效应产生的声场将被忽略。然后将结果与典型的实验数据进行比较，并分析发现的差异。此外，它将详细介绍研究典型装置所需的步骤和时间表，包括：1)螺旋桨下游流动中的机翼和机舱体，以及2)现实三维问题中的跨音速效果。该项目将有利于加普惠公司未来设计下一代涡轮螺旋桨发动机，这些发动机将必须满足更严格的噪音法规。

To demonstrate the capabilities of the in-house SMARTROTOR code in aero-acoustic problems of interest to Pratt & Whitney Canada (P&WC), the acoustic footprint of a multi-blade typical propeller configuration will be studied. The propeller blades will be considered thin airfoils; plate-like rigid structures and the acoustic field generated by compressibility effects will be neglected. The results will be then compared to typical experimental data and the discrepancies found will be analyzed. In addition, it will be detailed the steps and timeline necessary for studying typical installations, which will include: 1) wing and nacelle bodies in the flow downstream the propeller, and 2) the transonic effects in realistic 3-D problems. This project is going the benefit P&WC in the future design of the next generation of turboprop engines that will have to meet more stringent noise regulations.