Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4994405 | International Journal of Heat and Mass Transfer | 2017 | 14 Pages |
Abstract
An adiabatic upward air-water flow experiment was performed on a vertical pipe with 25.4Â mm inner diameter to investigate the interface structure and characteristics. Local experiment parameters, including time-averaged void fraction, interfacial area concentration, bubble interfacial velocity and Sauter mean diameter were measured using a four-sensor conductivity probe with a data acquisition frequency of 100Â kHz. Experiment data for 19 flow conditions was collected at 3 axial locations (z/DÂ =Â 15, 78, and 141) and 13 radial positions from r/RÂ =Â â0.84 to 0.7. In the experimental study, the measuring range of superficial liquid and gas velocity were from 0.3 to 1.0Â m/s and 0.03 to 11.0Â m/s, respectively. The flow regimes ranged from bubbly flow to the transition of churn-turbulent to annular flow. The local measurement result agreed well with the drift flux model by Ishii (1977) and Kataoka (1987). The different interfacial structures in different flow regimes and two group bubble interfacial transfer were observed from the experiment result. This data will be used for the evaluation and extension of the current interfacial area transport equation.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Zhuoran Dang, Guanyi Wang, Peng Ju, Xiaohong Yang, Robert Bean, Mamoru Ishii, Stephen Bajorek, Matthew Bernard,