An Aerodynamic-Acoustic Design of an Electrical and Shrouded Tail Rotor

航空航天行业的创新目标是降低燃油消耗和噪音排放。线控电力技术解决了这些挑战，设计更轻，操作灵活性更高，成本更低。由于电动马达具有可变的转速，可以释放转子和螺旋桨的设计和优化策略中的约束。除了传统飞机和旋翼机之外，城市空中机动性或自主空运市场还出现了新的概念，将对紧急医疗服务、交通和安全监测、客运等城市任务做出回应。操纵过程中的噪音困扰和直升机机场周围的当地社区噪音担忧必须由制造商及早解决。本研究项目旨在迎接气动-气声耦合优化方法发展的挑战，以设计较安静的旋翼和螺旋桨。与蒙太尔技术学院、麦吉尔大学、舍布鲁克大学、加拿大工业公司贝尔德事隆和Optis Engineering的合作目标是开发用于电气分布式抗扭矩(EDAT)系统的气动-气动声学耦合优化框架，以装备加拿大生产的未来贝尔直升机。七名研究生将致力于应用最先进的多学科优化方法，填补旋转机械空气声学方面的知识空白。由于高保真的模拟和实验方法将在代表EDAT系统的单扇罩风扇上进行，这项研究将为噪声预测提供准确的验证和校准数据。有了这一举措，最先进的优化技术将以一种独特的方式与快速准确的气动声学模型相结合。除了保持和提高加拿大航空航天行业在全球市场上的竞争力，参与拟议研究项目的高素质人员将是加拿大航空航天行业的宝贵资产：了解社区噪音困扰并熟练地应对它。

Aerospace industry innovations targets reduction of fuel consumption and noise emission. Electrical power-by-wire enabled technology address these challenges yielding lighter designs, increased operation flexibility and cost reduction. With electric motors having variable rotational speed, constraints in design and optimization strategies for rotor and propellers can be released. In addition to conventional aircraft and rotorcraft, new concepts arise in the urban air mobility or autonomous air delivery markets that will respond to urban missions such as emergency medical service, traffic and safety monitoring, passenger transportation. Noise annoyance during manoeuvre and local community noise concerns around heliports have to be addressed early by manufacturers. This research project is intended to take on the challenge with the development of aerodynamic-aeroacoustic coupled optimization methods for the design of quieter rotor and propellers. The objective of the partnership with École de technologie supérieure de Montréal, McGill University, and Université de Sherbrooke and the Canadian industrial companies Bell Textron Canada and Optis Engineering is to develop a coupled aerodynamic-aeroacoustic optimization framework for an electrical distributed anti-torque (EDAT) system to equip future Bell helicopters produced in Canada. Seven research students will be committed to apply state-of-the-art multi-disciplinary optimization methodologies and fill knowledge gaps in aeroacoustics of rotating machines. Thanks to the high-fidelity simulations and experimental approaches that will be conducted on a single shrouded fan representative of the EDAT system, this research will provide accurate validation and calibration data for the noise predictions. With this initiative, the most advanced optimization technique will be coupled with fast and accurate aeroacoustic models in a unique manner. In addition to maintaining and improving the competitiveness of the Canadian Aerospace industry in a world-wide market, the highly qualified personnel involved in the proposed research project will be valuable assets for the Canadian industry: aware of communities noise annoyance and skilled to tackle it.