Abstract
The differential pressure fluctuation resulting from the two-phase flow contains much information about the mixture fluid flowing, which is one of important research work to realize the flowage measurement and automatic controlling. The statistical and fractal feature of fluctuating differential pressure for air-water two-phase flow in the upward section of U-type tube was investigated. Specially, the mean, the root mean square, the fractal dimension and their variety vs gas superficial velocity were emphasized. The results show that the features have close relationship with flow pattern, but they have less practicality to be used to identify the transitions of flow patterns. Whereas, the root mean square can be used as a criteria under the condition of low liquid superficial velocity, while it is invalid under the condition of high liquid superficial velocity. In addition, the referenced research results cannot be applied to the present work, which the flow patterns can be identified with the possibility density function. The fractal dimension of the fluctuations are lower than 1.5 in all flow regimes besides the annular flow with great gas superficial velocity. At the same time, the liquid superficial velocity influences the chaotic strongly. The future investigation is needed to understand the chaotic feature.
| Original language | English |
|---|---|
| Pages (from-to) | 22-26 |
| Number of pages | 5 |
| Journal | Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering |
| Volume | 22 |
| Issue number | 3 |
| State | Published - Mar 2002 |
Keywords
- Differential pressure
- Fluctuation
- Fractal dimension
- Statistical analysis
- Two-phase flow