The regime map for the direct contact condensation of steam vertically injected through a mini nozzle

미세노즐을 통해 수직분사된 수증기의 직접접촉응축 영역도

  • 이수관 (포항공과대학교 환경공학부) ;
  • 배성효 (한국과학기술기획평가원) ;
  • 김무환 (포항공과대학교 기계공학과/환경공학부)
  • Published : 2004.11.03


Steam was vertically discharged into water through mini nozzles of various diameters (d=0.115, 0.520, 1.55mm). The condensation was observed and categorized into several types of condensation regimes for each of the nozzles. Compared with the regimes in the previous researches, the regimes of 'internal necking with attached bubble' and 'internal chug with detached bubble' were newly observed. Depending on a nozzle, some regimes expanded, shrank, or moved in the regime map. For the nozzle of 1.55mm, the regime map was similar to Chan and Lee (1982) except that the regime of 'internal chug' was not observed. For the nozzle of 0.115mm, the regime of 'internal chug' appeared even at high pool temperature.