CFD study of oscillatory flow across porous structure

Peter, Tan Lui Ming (2021) CFD study of oscillatory flow across porous structure. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The oscillatory flow across porous structure is a typical feature in thermoacoustic system, by using the CFD software to study the thermoacoustic system, the flow can be visualised and analysed easily. The two objectives of the project are to model the oscillatory flow in thermoacoustic refrigeration system and also to study the effect to the flow and thermoacoustic performance by changing the working fluid in the thermoacoustic refrigeration system. In this study, the 2D oscillatory flow in thermoacoustic refrigeration system is successfully modelled by using dynamic mesh method to prevent the backflow of the inlet. There are four working gases that are compared in this study, air and three different noble gases, helium, neon and argon. The operating parameters is designed based on each working gases. The results show the noble gases provide a better thermoacoustic effect after the approximately same time period (0.1s). Helium as working fluid shows the best performance in terms of temperature differences at the stack of 0.528°C. The recommendations for further study of CFD of oscillatory flow across porous media in thermoacoustic refrigeration system are also suggested

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