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논문 기본 정보

자료유형
학술저널
저자정보
Zhang Dandi (School of Mechanical Engineering Shanghai Jiao Tong University) Tong Lili (School of Mechanical Engineering Shanghai Jiao Tong University) Cao Xuewu (School of Mechanical Engineering Shanghai Jiao Tong University)
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제55권 제2호
발행연도
2023.2
수록면
780 - 791 (12page)
DOI
10.1016/j.net.2022.10.001

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초록· 키워드

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To study oscillation characteristic of steam and non-condensable gas direct contact condensation through multi-hole sparger at low mass flux, a series of experiments of pure steam and mixture gas condensation have been carried out under the conditions of steam mass flux of 20e120kg/m2s, water temperature of 20e95 C and mass fraction of non-condensable gas of 0e5%. The regime map of pure steam condensation through multi-hole sparger is divided into steam chugging, separated bubble, aggregated bubble and escaping aggregated bubble. The bubbles behavior of synchronization in the same hole columns and desynchronized excitation between different hole columns can be found. The coalescence effect of mixture bubbles increases with water temperature and non-condensable gas content increasing. Pressure oscillation intensity of pure steam condensation first increases and then decreases with water temperature increasing, and increases with steam mass flux increasing. Pressure oscillation intensity of mixture gas condensation decreases with water temperature and non-condensable gas content increasing, which is significantly weaker than that of pure steam condensation. The oscillation dominant frequency decreases with the rise of water temperature and non-condensable gas content. The correlations for oscillation intensity and dominant frequency respectively are developed in pure steam and mixture gas condensation at low mass flux.

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