Creating an automatic system it for calculating a tunable Helmholtz resonator

Abstract

This paper demonstrates that a tunable Helmholtz resonator (HR) can exist in a gear pump as a broadband absorber. It is common to encounter a problem of the pulsating pressure of working fluid in current hydraulic systems. This pulsation load negatively affects the durability of all elements of the system. Hence the unregulated HR is narrowband silencer, which is not effective over the entire frequency range. Thus it is necessary to design an adaptive HR, which changes its cavity volume so that the natural frequency of resonator corresponds with the excitation frequency. Designing this device requires a lot of calculation. Therefore, the main purpose of the article is creating an automatic system for calculating a tunable resonator. The automatic system for calculating the tuned resonator is created in the software package Microsoft Excel. In the process of creating the system, the existing method of design calculation was made more accurate and a methodology for calculating the absorber’s efficiency was developed. The result of this work is a fully automatic system for calculating a tunable resonator, which can significantly reduce the time, and hence the design cost of this unit. Finally, the adequacy of used methods was confirmed.