| Autor: |
Allafi, W. A., Saat, F. A. Z. Mohd, Irfan, A. R., Anuar, F. Shikh, Johari, D., Sukri, M. F., Saechan, P., Razak, Rafiza Abd, Abdullah, Mohd Mustafa Al Bakri, Rahim, Shayfull Zamree Abd, Tahir, Muhammad Faheem Mohd, Mortar, Nurul Aida Mohd, Jamaludin, Liyana |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2020, Vol. 2347 Issue 1, p1-10, 10p |
| Abstrakt: |
Today, development of technology must not only be concentrated at the system's performance but also on the technological impact on the environment. Thermoacoustic offers green technology for at least two most important applications; the refrigeration and power generation devices. The use of inert gaseous as working medium and very minimum moving mechanisms make the technology attractive as an alternative to the conventional systems that used harm working medium and depleted resources. Fluid dynamics understanding of oscillatory flow for thermoacoustic working environment is less understood making the prediction of losses and gain difficult especially during the design stage. This study presents the numerical investigation of oscillatory flow within channels of parallel-plate structure, a structure that plays the role of a regenerator inside a standing wave thermoacoustic environment. A two-dimensional ANSYS FLUENT CFD models were solved. The model was validated using available experimental data and theoretical solution. Two different operating frequencies of 14.2 Hz and 23.6 Hz were applied. Two regions (entrance region and exit region) were detected at the ends of the channel for both frequencies. Entrance region for 14.2 Hz frequency was found to extend to a longer distance into the channel compared to that of the 23.6 Hz. In general, the findings suggested that the fluid dynamics of flow within the area of parallel-plate structure should be considered as entrance/exit region due to the cyclic nature of flow. Turbulence should also be expected within this region due to the cyclic travel of vortex across the structure. The findings are expected to be useful for future design of a more efficient thermoacoustic devices. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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