Helmholtz resonator adjustment computational studies, where in order to reduce the vehicle noise level, the resonator waveguide and throat are inside the resonator volume

Introduction (problem statement and relevance). The paper analyzes the impact of changing the position of one of the ring-type Helmholtz resonators in relation to the second one on the adjustment of the required sound attenuation frequency. Along with that, it covers the impact of temperatures and geometrical parameters of the resonators. The relevance of the paper consists in the possibility to predict and update the adjustments originally provided in the design. The purpose of the study is to determine the dependences of the ring-type resonator parameters required for resonant frequency adjustment. Methodology and research methods. The studies were carried out by means of numerical calculations using the finite element method with further introduction of the results in the form of dependence diagrams. Scientific novelty and results. An example of practical application of adjustment of two co-operating resonators is given. At the moment, there is a great number of papers devoted to the classical Helmholtz resonator and its resonant frequency adjustment. But there is no detailed information about the ring-type resonators. Practical significance. The studies conducted are of great practical importance when developing and researching new configurations of Helmholtz resonators within real exhaust systems.