A semi-analytical model for the influence of temperature on sound propagation in sintered metal fiber materials. (15th November 2017)

• Record Type: Journal Article
• Authors: Ren, Shuwei; Xin, Fengxian; Lu, Tian Jian; Zhang, Chuanzeng
• Is Part Of: Materials & design. Volume 134(2017)
• Page Start: 513
• Page End: 522
• Publication Date: 2017-11-15
• Subjects: Sintered metal fiber materials -- Semi-analytical model -- Sound propagation -- High temperature; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2017.09.007
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: A semi-analytical model is developed to predict the influence of temperature on the sound absorbing performance of sintered metal fiber materials (SMFMs) by extending the Johnson-Champoux-Allard-Lafarge (JCAL) model. In this model, three micro-structure factors of the SMFMs – the Kozeny number and the thermal and viscous shape factors – are calculated by applying the multi-scale asymptotic method (MAM), and the temperature effect is taken into account by considering the variations of the thermo-physical parameters of saturated air with temperature. Key transport parameters (e.g., viscous and thermal permeability, tortuosity, viscous and thermal characteristic lengths) are then directly determined by fiber diameter and porosity of the material. High-efficiency of the semi-analytical model is demonstrated for estimating the influence of topological parameters upon sound absorption under different temperatures. The transport parameters obtained by the proposed model agree well with those calculated using fully numerical simulations. Also, the model predictions are in accordance with existing experimental measurements at different temperatures. The model reveals not only the underlying mechanisms of temperature effect on sound propagation in porous metals, but also provides a theoretical guideline for the sound absorption application of SMFMs in high temperature environments. Graphical abstract: Highlights: The temperature effect on sound propagation is studied using the thermo-physical property of saturated air. The fluidic transport parameters of porous materials can be calculated by the multi-scale asymptotic method. Increasing the temperature enlarges the acoustic impedance of the SMFM, and hence changes its sound absorption. The sintered metal fiber materials are capable of effectively absorbing noise in high temperature.