Influence of cavity wall elasticity on resonant frequency of small underwater cylindrical Helmholtz resonator 腔壁弹性对水下小型圆柱形亥姆霍兹共振器共振频率的影响
Experimental Study on Heat Transfer Enhancement of Helmholtz Resonator Pulsating Fluid Helmholtz共振腔脉动流体强化换热的试验研究
The effect of installing the Helmholtz resonator in CA488 engine air intake manifold on engine performances is also analyzed in this paper. 并分析了在CA488进气管中装入亥姆赫兹谐振器对发动机性能的影响。
In this paper, five schemes of variably tuned Helmholtz resonator were proposed and simulated detailedly, the results shows that changing the neck area affects the resonant frequency significantly. 文中提出了可调频式亥姆霍兹共振式消声器的五种结构设计方案,并逐一进行了仿真计算分析,结果表明:共振器颈部横截面积的改变对共振频率的影响较大。
Two kinds of design show more noise reduced below 1000 Hz, one is the air-in filter with only one expand chamber, and the other is with the Helmholtz resonator. 通过对比分析,最终选择了在1000Hz以下的低频消声性能相对较好的两种设计方案:单扩张腔式空气滤清器和Helmholtz共振腔式空气滤清器。
The optimization of the air-in filter acoustic performance by Helmholtz resonator based on calculation and experiment has effect on the decrease of pass-by noise. 基于这一研究结果,在计算和实验的基础上利用Helmholtz共振腔对空滤器的声学特性进行了改进,改进后的空滤器对降低车辆进气侧通过噪声有很好的作用。
This paper describes a new phenomenon of acoustic streaming, which ta-kes place when a Helmholtz resonator is excited by an inside sound source with resonant frequency, and takes the form of a turbulent jet. 本文描述了一种新的声学整流效应现象,当Helmholtz共振腔内部声源以共振频率激振时,整流以一股湍流喷流形式发生。
Freedom; Helmholtz resonator A New Deduction of the Criterion of Equilibrium and Spontaneity from Helmholz and Gibbs Free Energy Functions 推导亥姆霍兹自由能和吉布斯自由能判据的新方法
In this paper, the transfer matrix of Helmholtz resonator was erected, the resonant frequency and the characteristics of attenuating pressure pulsation were calculated by use of the transfer matrix method. 本文建立了亥姆霍兹共振式消声器的传递矩阵,进而计算了它的共振频率和压力脉动衰减特性。
A study of sound field in a standing wave tube with flow and lateral Helmholtz resonator II. Experimental confirmation and results discussion 具有流动和侧向Helmholtz共振器的驻波管内声场研究Ⅱ.实验验证及结果讨论
Effect of Air cleaner on Engine Performance and Application of Helmholtz Resonator 空气滤清器对发动机性能的影响及亥姆赫兹谐振器的使用
The mechanism for low noise asphalt pavement to lower tyre noise is analyzed. A acoustical model is put forward. The resonance frequency of sound wave is analyzed with Helmholtz resonator model. 分析了低噪声沥青混凝土路面降低轮胎噪声的机理,建立低噪声沥青混凝土路面的声学模型,用亥姆霍兹共振器模型分析计算了声波的共振频率。
This paper build an one dimensional axial propagating model for Helmholtz resonator, and the noise eliminating mechanism has been revealed. 建立了共振腔型消声器一维轴向声传播模型,揭示了圆形旁支型共振进气消声器的消声机理。
Investigation on the Acoustic Character of Helmholtz Resonator's Throat in the Nonlinear Condition High fidelity acoustics are not only associated with acoustic system and sound source, but also with the acoustic character of the place. 强非线性条件下Helmholtz共振器喉部声学特性研究高保真音响效果不仅与音响系统及音源有关,还与听音场所的声学特性有关。
Experiments indicate that the coupled system can greatly increase the output pressure ratio much higher than a Helmholtz resonator. 研究表明,三管道耦合系统能大幅度提高输出压力振幅,其压力振幅的放大能力大于亥姆霍兹共鸣器。