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학술저널
저자정보
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대한기계학회 대한기계학회 논문집 B권 대한기계학회논문집 B권 제26권 제11호
발행연도
2002.11
수록면
1,559 - 1,569 (11page)

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In order to investigate the characteristics of electromagnetic flowmeter in two-phase flow, an AC electromagnetic tlowmeter was designed and manufactured. In various tlow conditions, the signals and noises from the tlowmeter were obtained and analyzed by comparison with the observed tlow patterns with a high speed CCO camera. The experiment with the void simulators in which rod shaped non-conducting material
was used was carried out to investigate the efTect of the bubble position and the void fraction on the tlowmeter. Based on the results from the void simulator, two-phase tlow experiments encompassed from bubbly to slug tlow regime were conducted. The simple relation △UTP= △UTP(1 -a) was verified with measurements of the potential difference and the void fraction. Due to the lack of homogeneity in a real two-phase tlow, the discrepancy between the relation and the present measurement was sl ightly increased with void fraction and also liquid volumetric flux )" Whereas there is no difTerence in the shape of the raw signal between singlephase tlow and bubbly tlow, the signal amplitude for bubbly flow is higher than that for single -phase tlow at the same water flow rate, since the passage area of the water flow is reduced. In the case of slug tlow, the phase and the amplitude of the flowmeter output show dramatically the now characteristics around each slug bubble and the position of a slug bubble itself. Therefore, the electromagnetic flowmeter shows a good possibility of being useful for identifying the tlow regimes.

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Abstract

1.서론

2.기존연구

3.유량계방정식

4.실험장치

5.실험방법 및 결과

6.결론

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