사다리꼴 미세유로의 대류비등 2상유동:1부-압력강하 특성Convective Boiling Two-phase Flow in Trapezoidal Microchannels:Part 1-Pressure Drop Characteristics
- Other Titles
- Convective Boiling Two-phase Flow in Trapezoidal Microchannels:Part 1-Pressure Drop Characteristics
- Authors
- 김병주; 김건일
- Issue Date
- 2011
- Publisher
- 대한설비공학회
- Keywords
- Two-phase flow pressure drop(2상유동 압력강하); Microchannels(미세유로); Two- phase friction multiplier(2상 마찰배수); Martinelli parameter(마티넬리 변수); Chisholm parameter(치숄름 변수)
- Citation
- 설비공학 논문집, v.23, no.1, pp.87 - 94
- Journal Title
- 설비공학 논문집
- Volume
- 23
- Number
- 1
- Start Page
- 87
- End Page
- 94
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/20503
- ISSN
- 1229-6422
- Abstract
- Characteristics of two-phase pressure drop in microchannels were investigated experimentally. The microchannels consisted of 9 parallel trapezoidal channels with each channel having 205 μm of bottom width, 800 μm of depth, 3.6° of sidewall angle, and 7 cm of length. Pressure drops in convective boiling of Refrigerant 113 were measured in the range of inlet pressure 105~195 kPa, mass velocity 150~920 kg/m^2s, and heat flux 10~100 kW/m^2. The total pressure drop generally increased with increasing mass velocity and/or heat flux. Two-phase frictional pressure drop across the microchannels increased rapidly with exit quality and showed bigger gradient at higher mass velocity. A critical review of correlations in the literature suggested that existing correlations were not able to match the experimental results obtained for two-phase pressure drop associated with convective boiling in microchannels. A new correlation suitable for predicting two-phase friction multiplier was developed based on the separated flow model and showed good agreement with the experimental data.
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