Réduction du bruit et optimisation aérodynamique de systèmes d'aspiration d'air domestiques - Projet Aspire

本项目旨在通过探索和结合两种方法来减少家庭抽气系统产生的噪音。首先，通过正确设计通风轮来降低噪音，重点关注其空气动力学性能。为此，我们将利用相关文献中的伴随方法开发基于叶片形状优化的新设计技术。第二种方法是通过应用于蜗壳壁和过滤网格的新一代声学处理来降低噪声。为此，我们将探索和发展受气流影响的热粘声超材料的新概念，并适应这一问题（空间有限，频率范围扩大）。通过原始的优化过程，这些超材料将组合形成蜗壳元壁和过滤元网格。将优化后的三个部件（轮毂、元壁、元网格）集成到一个空气抽取系统原型中，并进行实验分析和测试。该系统预计将比传统系统更安静，同时保持或提高其空气动力学性能。将提出新的建模方法，如将数值热粘声分析与解析串行和并行传递矩阵耦合，以及新的伴随气动设计优化求解器，并将其转让给工业合作伙伴。该项目将有助于减少住宅通风系统产生的噪音，提高居民的生活质量，从而对社会和环境产生影响。

This project aims to reduce the noise generated by domestic air extraction systems by exploring and combining two approaches. The first deals with noise reduction by correctly designing the ventilation wheel with a focus on its aerodynamic performance. To do this, we will develop new design technologies based on blade shape optimization by the adjoint methods in relative reference. The second approach is to reduce noise through a new generation of acoustic treatments applied to the walls of the volute and the filter grid. For this purpose, we will explore and develop new concepts of thermo-visco-acoustic metamaterials subject to airflow and adapted to the problem (restricted space, extended frequency range). Through an original optimization process, these metamaterials will be combined to form volute metawalls and filtration metagrids. The integration of the three optimized elements (wheel, metawalls, metagrids) in a prototype of air extraction system will be analyzed and tested experimentally. This system is expected to be quieter than conventional systems while maintaining or increasing its aerodynamic performance. New modeling approaches such as the coupling of numerical thermo-visco-acoustic analysis to analytical serial and parallel transfer matrices, as well as new adjoint aerodynamic design optimization solvers, will be proposed and transferable to the industrial partner. This project will have a social and environmental impact by helping to reduce the noise caused by residential ventilation systems and improve the quality of life of residents.