Development research of reflection-absorption compound type fluid pulsation attenuator

Abstract

Based on the disadvantages analysis of the existing fluid pulsation attenuator, two reflection-absorption compound type of fluid pulsation attenuators which are both composed of a chamber and a mass-spring-damping system are developed: in-line reflection-absorption compound type of fluid pulsation attenuators (in-line RAFPA) and side-branch reflectionabsorption compound type of fluid pulsation attenuators (sidebranch RAFPA). The transfer matrix models of the two attenuators are established as well as expansion chamber attenuator and Helmholtz resonator. Based on the transfer matrix model, the transmission loss of the four attenuators is given out to evaluate their attenuation characteristic. The attenuation characteristic comparisons of in-line RAFPA with expansion chamber attenuator and side-branch RAFPA with Helmholtz resonator are carried out respectively. And the effect of the mass-spring-damping system to in-line RAFPA and side-branch RAFPA is investigated. The simulation reveals the two reflection-absorption compound type of fluid pulsation attenuators have better attenuation characteristic and are more compact than expansion chamber attenuator and Helmholtz resonator.

Investigation of the pulsation-reduction characteristics of an expansion chamber attenuator in a hydraulic system

“…4 The represented types are Helmholtz resonators, Herschel-Quincke tubes, Quarter-Wavelength tubes and sonic crystals. 5,6 These kinds of attenuators are effective for high frequency pulsation. Nonetheless, in low frequency fields, the performances can only be satisfied by much larger dimensions for longer wavelengths.…”