科研之友
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摘要
An experimental investigation was conducted to study the characteristics of turbulent swirling flow in an axisymmetric annuli. The swirl angle measurements were performed using a flow visualization technique using smoke and dye liquid for Re = 60,000-80,000. Using the two-dimensional particle image velocimetry method, this study found the time-mean velocity distribution and turbulent intensity in water with swirl for Re = 20,000, 30,000, and 40,000 along longitudinal sections. There were neutral points for equal axial velocity at y/(R - r) = 0.7-0.75, and the highest axial velocity was recorded near y/(R - r) = 0.9. Negative axial velocity was observed near the convex tube along X/(D - d) = 3-23.
- 出版日期2010-11
