ヘルムホルツ共鳴器薄型化に向けたネック出口流路縮小と寸法最適化の数値解析

Key Points

• To investigate the reduction of low-frequency noise through the optimization of Helmholtz resonators.
• Conducted acoustic analysis using finite element method considering thermal viscosity.
• Introduced a flow path reduction at the neck outlet to shorten the neck length by approximately 25%.
• Simultaneously optimized neck length and cavity volume after adjusting shape parameters.
• Maintained nearly perfect absorption ratio while reducing cavity volume by up to 36%.
• Demonstrated that further miniaturization of the Helmholtz resonator is achievable.