Mean and turbulence properties of a neutrally buoyant round jet in a wave environment

Shih Chun Hsiao, Tai Wen Hsu, Jian Feng Lin, Kuang An Chang

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34 引文 斯高帕斯(Scopus)

摘要

An experimental study of a turbulent round jet discharged into a regular wave field is presented. The particle image velocimetry (PIV) technique was employed to measure instantaneous velocity fields of the flow. Quantitative mean and turbulence properties were obtained using ensemble- and phase-averaged methods. Both the jet potential core region and self-similar region were measured. Three different wave heights were used to examine the effect of wave steepness on the jet properties. Measurements were also taken at three different phases to examine the wave phase effect. Experimental results demonstrate that the mean jet width, turbulence intensity, and Reynolds stress increased significantly when the jet was acted on by the waves. In addition, the jet mean kinetic energy decreased whereas the turbulent kinetic energy increased when the jet was under the waves, indicating an increase in turbulence. The wave phase has an insignificant effect on the both the mean and turbulence properties. The turbulent kinetic energy budget in the self-similar region at different wave conditions was also examined. It was found that the turbulent production, advection, and dissipation terms all increase with the increase of the wave height.

原文English
頁(從 - 到)109-122
頁數14
期刊Journal of Waterway, Port, Coastal and Ocean Engineering
137
發行號3
DOIs
出版狀態Published - 2011 5月 10

All Science Journal Classification (ASJC) codes

  • 土木與結構工程
  • 水科學與技術
  • 海洋工程

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