Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Numerical and experimental study of a pulsation damper: application of a hyperelastic model for uniaxial tension
Submission Author:
Matheus Alves Lima , Buscando endereço... , Brazil
Co-Authors:
Matheus Alves Lima, Bruno Loureiro, Daniel Ribeiro, João Paulo Barbosa, Michel de Oliveira dos Santos, Pedro Vitor Morbach Dixini, Renato Siqueira
Presenter: Matheus Alves Lima
doi://10.26678/ABCM.COBEM2023.COB2023-2171
Abstract
In pumping systems present in the industrial field, devices such as flow attenuators are widely used to reduce pressure and flow pulsations generated by positive displacement pumps. Due to the harmful effects that this type of system provides to installations, such as mechanical vibrations and process instabilities, the development of pulsation dampers with improved characteristics is of fundamental importance to obtain more efficient systems. The objective of this work was to develop a three-dimensional computational model of fluid structure interaction (FSI) applied to the analysis of a rubber pulsation damper, validating the results obtained through experimental tests. For the numerical simulations, an algorithm was implemented using the Scilab software, using the Yeoh hyperelastic model applying data from uniaxial tension tests. The experimental tests were carried out on a rig of a pumping system with pulsating flow emitted by a diaphragm pump, composed of pressure sensors upstream and downstream of the installed component, in addition to a flow sensor at the outlet. Experimental tests were carried out with a rigid component, Polyvinyl chloride, and with the pulsation damper composed of rubber SBR model AV 3008 according to the manufacturer Avutec (Araújo Vulcanização Técnica LTDA). For material characterization, samples of already vulcanized attenuators were analyzed using Fourier Transform Infrared Spectroscopy. Tensile tests were carried out to obtain the mechanical properties of the rubber. The computational results obtained with the hyperelastic models were confronted with the experimental results, showing that the third-order Yeoh model is the most suitable for simulations involving uniaxial tensile tests, due to the ease in adjusting the curve parameters according to the inserted data. The way in which the energy accumulation was distributed along the attenuator was coincident between the numerical and experimental tests. A higher level of deformation than that shown in practice was verified in numerical tests, which may be associated with the effect of the dynamic properties of the material throughout the experimental test.
Keywords
fluid-structure interaction, Computational Fluid Dynamics, Pulsation damper, rubber
