지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
in this study a method to predict CHF (Critical heat flux) in vertical round tubes with axially non-uniform cosine heat flux distribution for water was examined. For this purpose a local condition hypothesis based CHF prediction correlation for uniform heat flux in vertical round tubes for water was developed from 9,366 CHF data points. The local correlation consisted of 4 local condition variables: the system pressure (P), tube diameter (D), mass flux of water (C), and 'true mass quality' of vapor (X<SUB>t</SUB>). The CHF data points used were collected from 13 different published sources having the following operation ranges: 1.01≤P (pressure) ≤ 206.79 bar, 9.92 ≤ G (moss flux) ≤ 18,619.39 ㎏/㎡s, 0.00102 ≤ D (diameter) ≤ 0.04468 m, 0.0254 ≤ L (length) ≤ 4.966 m, 0.11 ≤ qc (CHF) ≤ 21.41 ㎿/㎡, and -0.87 ≤ X<SUB>c</SUB> (exit qualities) ≤ 1.58. The result of this work showed that a uniform CHF correlation can be easily extended to predict CHF in axially non-uniform heat flux heater. In addition, the location of the CHF in axially non-uniform tube can also be determined, The local uniform correlation predicted CHF in tubes with axially cosine heat flux profile within tire root mean square error of 12.42% and average error of 1.06% jar 297 CHI data points collected from 5 different published sources.
목차
ABSTRACT
1. Introduction
2. Experimental Data
3. Modified OSV
4. Local Condition Hypothesis
5. Non-Uniform Heat Flux Profile
6. Overall Power Hypothesis
7. Results and Discussion
8. Conclusions
Acknowledgements
References
참고문헌 (26)
참고문헌 신청
1. [보고서] - Becker, K.M / 1965 / Burnout Data for Flow of Boiling Water in Vertical Round Ducts, Annuli, and Rod Clusters : 177 ~
2. [보고서] - Becker,K.M. / 1971 / Round Tube Burnout Data for Flow Boiling of Water at Pressures between 30 and 200 bar, Royal Institute of Technology
3. [보고서] - Bertoletti,S. / 1963 / Critical Heat Flux Data for Fully Developed Flow of Steam‐Water Mixtures in Round Vertical Tubes with Non Uniform Axial Power Distribution
4. [보고서] - Casterline,J.E / 1965 / Second Experimental Study of Dryout in a Long Vertical Tube with a Cosine Heat Flux
5. [보고서] - Casterline,J.E. / 1964 / Burnout in Vertical Long Tubes with Uniform and Cosine Heater Using Water at 1000 psia
2. [보고서] - Becker,K.M. / 1971 / Round Tube Burnout Data for Flow Boiling of Water at Pressures between 30 and 200 bar, Royal Institute of Technology
3. [보고서] - Bertoletti,S. / 1963 / Critical Heat Flux Data for Fully Developed Flow of Steam‐Water Mixtures in Round Vertical Tubes with Non Uniform Axial Power Distribution
4. [보고서] - Casterline,J.E / 1965 / Second Experimental Study of Dryout in a Long Vertical Tube with a Cosine Heat Flux
5. [보고서] - Casterline,J.E. / 1964 / Burnout in Vertical Long Tubes with Uniform and Cosine Heater Using Water at 1000 psia
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