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NTIS 바로가기한국마린엔지니어링학회지 = Journal of the Korean Society of Marine Engineering, v.40 no.4, 2016년, pp.275 - 281
최용석 (Division of Marine Engineering, Korea Maritime and Ocean University) , 김유택 (Division of Marine System Engineering, Korea Maritime and Ocean University) , 임태우 (Division of Marine Engineering, Korea Maritime and Ocean University)
Subcooled boiling under low pressure was numerically investigated using computational fluid dynamics(CFD). The wall boiling model was used for simulating the subcooled boiling; this model requires sub-models consisting of bubble departure diameter, nucleation site density and bubble departure freque...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
과냉각 비등이란 무엇인가? | 과냉각 비등이란 가열면 부근에서 국부적으로 비등이 발생하지만 액체의 평균온도는 포화온도 보다 낮게 유지 되는 현상을 의미한다. 비등을 위한 가열면의 실질적인 온도는 작동유체의 포화온도보다 높아야 하며, 가열면의 온도가 일정 수준이상이 되면 핵비등이 시작된다. | |
2상 유동 열전달의 장점은? | 이러한 2상 유동 열전달은 단상 유동에 비해서 높은 열전달 계수를 가지기 때문에 효과적으로 열을 소산시킬 수 있다. 이러한 장점은 여러 산업분야에서 효과적으로 적용 되고 있다. | |
핵비등 시 발점을 설명하시오 | 과냉각 비등이란 가열면 부근에서 국부적으로 비등이 발생하지만 액체의 평균온도는 포화온도 보다 낮게 유지 되는 현상을 의미한다. 비등을 위한 가열면의 실질적인 온도는 작동유체의 포화온도보다 높아야 하며, 가열면의 온도가 일정 수준이상이 되면 핵비등이 시작된다. 이때를 핵비등 시 발점(onset of nucleate boiling, ONB)이라고 한다. |
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