Effectiveness enhancement of a thermal regenerator in an oscillating flow
- Effectiveness enhancement of a thermal regenerator in an oscillating flow
- 이건태; 강병하; 이재헌
- 열재생기; thermal regenerator; oscillating flow; porosity; pressure loss; 왕복유동; 유용도; 기공도
- Issue Date
- Applied thermal engineering
- VOL 18, NO 8, 653-660
- An experimental study has been carried out to investigate the effects of the combination of regenerator materials on the regenerator effectiveness in an oscillating flow. Three types of regenerators are considered in this study. A homogeneous regenerator is made of a wire mesh number 120. Two heterogeneous regenerators are made of the combination of three kinds of wire mesh numbers (60, 120, 200), (200, 120, 60) in order. The average porosities of all these regenerators are kept at 0.7 in the experiment. Transient temperature variations inside the regenerator as well as pressure differences between the both ends of regenerator are measured for the several oscillating frequencies. The results obtained indicate that not only the regenerator effectiveness can be enhanced, but also that the pressure loss is decreased with the proper combination of regenerator materials even though the average porosity of the regenerator is not changed. It is also found that the pressure loss through the regenerator is increased with an increase in the frequency of oscillating flow, while the regenerator effectiveness is decreased.
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