STUDY OF INHERENT FREQUENCY OF HELMHOLTZ RESONATOR

Self-resonating water jet has been the subject of interest for researchers. The inherent frequency of Helmholtz Resonator is one of the important parameters for design of self-resonating water jet nozzle device. A new parametric model for prediction of the inherent frequency of Helmholtz resonator used in the field of water jet technology was proposed in this paper. Development of the model was based on the assumptions that the length and the diameter of Helmholtz resonating chamber and the length of the straight pipe segment of water jet nozzle are in the same order of magnitude. In comparison with the existing parametric model, the assumptions are more reasonable and the physical model on which the new parametric model was developed is in good agreement with the real configuration of Helmholtz resonator found in self-resonating water jet. As a result, the new model was expected to be more accurate in prediction of the inherent frequency of Helmholtz resonator.