کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7152295 1462376 2018 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hybrid noise control in a duct using a periodic dual Helmholtz resonator array
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Hybrid noise control in a duct using a periodic dual Helmholtz resonator array
چکیده انگلیسی
This paper focuses on the hybrid noise control in a duct using a periodic dual Helmholtz resonator (HR) array. A dual HR which consists of two HRs connected in series (neck-cavity-neck-cavity) leads to two resonance frequencies. A dual HR is analogous to a two degrees of freedom mechanical system. Based on the lumped model, the resonance frequencies and transmission loss of a dual HR have been derived. However, a dual HR is only effective at its resonance peaks with relative narrow bands. Aiming at broader noise attenuation bands for hybrid noise control at low frequencies, a periodic dual HR array is proposed in this paper. The wave propagation in a duct mounted with a periodic dual HR array is investigated theoretically and numerically. The Bragg wave theory and transfer matrix method are developed to conduct the investigation. The predicted theoretical results fit well with the Finite Element Method. Owing to the coupling of Bragg reflection and dual HR's resonances, a periodic dual array can provide much broader noise attenuation bands at the designed resonance frequencies of the dual HR. The proposed periodic dual HR array can be used in practical engineering work to reduce hybrid noise at low frequencies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Acoustics - Volume 134, May 2018, Pages 119-124
نویسندگان
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