Abstract
Based on the Workbench and CFX simulation technology, numerically analyzed were the fluid-induced lined and staggered cylindrical tube vibration at various intervals and heat exchange characteristics. The research results show that within the range of the study, the fluid induces the lined cylindrical tube vibration and there exists a critical value of the cylindrical tube interval L 1=3.5 d. When the interval is less than L 1, the downstream cylindrical tube vibration amplitude and frequency will decrease with a decrease of the interval. When the interval is bigger than L 1, the downstream cylindrical tube vibration frequency will no longer change with an increase of the interval. When the downstream cylindrical tube is located in the tail portion of the wake vortex caused by the upstream cylindrical tube, the vibration amplitude is relatively small and the area-averaged heat exchange effectiveness is relatively good. Under a same operating condition and at an identical interval, the fluid-induced downstream lined cylindrical tube vibration amplitude and frequency are bigger than the staggered cylindrical tube vibration amplitude and frequency. In a certain range of the interval, the heat exchange effectiveness of the fluid-induced downstream lined cylindrical tubes is superior to that of the staggered ones.
| Original language | English |
|---|---|
| Pages (from-to) | 554-559 |
| Number of pages | 6 |
| Journal | Reneng Dongli Gongcheng/Journal of Engineering for Thermal Energy and Power |
| Volume | 27 |
| Issue number | 5 |
| State | Published - Sep 2012 |
| Externally published | Yes |
Keywords
- Cylindrical tubes in a line arrangement
- Cylindrical tubes in a staggered arrangement
- Vibration-based heat exchange
- Vortex-excited vibration