Cross-wire anemometry was used to identify and characterize coherent flow pulsations in isothermal air flow near the gap regions of a five-rod bundle with a design pitch-to-diameter ratio of 1.149 and contained in a quasi-trapezoidal duct. It was confirmed that such pulsations are quasi-periodic and contribute significantly to the velocity fluctuations across the gap. The frequency of pulsations was found to decrease with diminishing rod-wall gap size in the range between 0.015D and 0.250D, where D is the rod diameter. The pulsations in a rod-wall gap and an adjacent rod-rod gap were strongly coupled and occurred at the same frequency as one rod was displaced towards the duct wall.
|Number of pages||8|
|Journal||Nuclear Engineering and Design|
|State||Published - Sep 2006|
Bibliographical noteFunding Information:
This research was supported by the Natural Sciences and Engineering Research Council of Canada.
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Nuclear Energy and Engineering
- Materials Science (all)
- Safety, Risk, Reliability and Quality
- Waste Management and Disposal
- Mechanical Engineering