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降低家用抽气系统产生的噪音。第一个是通过正确设计通风轮来降低噪音，重点是其空气动力学性能。为此，我们将在相关文献的基础上，采用伴随方法，发展基于叶片形状优化的新的设计技术。第二种方法是通过应用于蜗壳壁和过滤器格栅的新一代声学处理来降低噪音。为此，我们将探索和发展新概念的热粘声超材料受气流和适应的问题（有限的空间，扩展的频率范围）。通过一个原始的优化过程，这些超材料将被组合成蜗壳超壁和过滤超网格。将三个优化的元素（车轮，metawalls，metagrids）在抽气系统的原型中的集成进行分析和实验测试。预计该系统比传统系统更安静，同时保持或提高其空气动力学性能。新的建模方法，如耦合的数值热粘声分析的分析串行和并行传输矩阵，以及新的伴随气动设计优化求解器，将被提出和转让给工业合作伙伴。该项目将有助于减少住宅通风系统造成的噪音，提高居民的生活质量，从而产生社会和环境影响。

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.