切向流条件下赫姆霍兹共振器低频噪声传递损失的数值分析

Numerical analysis of relative low frequency noise transmission loss of Helmholtz resonators under a Grazing flow

利用Comsol Multiphysics数值分析的方法,针对切向流条件下的优化赫姆霍兹共振器进行数值模拟并与传统赫姆霍兹共振器作对比研究。通过分析,可以发现优化后的赫姆霍兹共振器有更好的消声性能。模拟结果表明,优化后的赫姆霍兹共振器可以产生2~3个共振峰,提升了大约120%的消声效率,提高了20 dB左右传递损失值,并且在一定程度上拓宽了消声频带。

Using the method of Comsol multiphysics numerical analysis, the optimized Helmholtz resonator under the condition of tangential flow is numerically simulated and compared with the traditional Helmholtz resonator. Through the analysis, it can be found that the optimized Helmholtz resonator has better noise attenuation performance. The simulation results show that the optimized Helmholtz resonator can produce two or three resonance peaks, which improves the noise elimination efficiency by about 120% and the transfer loss value of about 20 dB, and widens the noise elimination frequency band to a certain extent.