本文實驗研究是利用質點影像測速儀針對圓形水平射流在波浪環境下，探討紊亂擾動受波浪的影響。為了觀察紊亂射流與波浪大小之間的交互作用，本文在固定水深及週期之波浪條件下，改變波浪振幅來討論波浪振幅的影響。
實驗結果發現我們的資料再擷取斷面上的分佈與前人研究是相符合的，此外，射流的寬度、平均流況的強度與紊流速度振盪明顯會隨著波浪增加，在靠近射流口(核心區域)附近的平均斷面則是與純射流相似，但是斷面的分佈形狀會隨著射流速度的衰減與擴散而改變；紊流速度振盪的強度與斷面會因為波高的變大而快速增加，並且達到自我相似的特性，根據本文的結果發現，當射流在波浪環境下，波浪的相位對於平均速度場沒有很重大的影響，然而，對於靠近出口的區域(核心區域與近域流場)其紊流場的形狀與強度則有顯著的變化。

The present study experimentally investigated the mechanism of turbulent fluctuation when neutrally buoyant horizontal round jets are discharged into regular progressive waves. The particle image velocimetry (PIV) technique was employed to measure the instantaneous velocity field of a turbulent jet under a wave environment. Three different wave heights were used to examine the effects of wave amplitude on the interactions of a turbulent jet with water waves.
The agreement between our experimental data and similar profiles suggested by previous studies was discussed. The experimental results showed that the jet width, magnitude of the mean flow and RMS (root-mean-square) velocity fluctuation increased significantly when the jet was acted by a wave. It is found that the mean profile of the jet near the nozzle (potential core) is similar to that of a pure jet, but the shape of the profile changes with the jet decayed and spread downstream in the wave environment. The magnitude and profile of the RMS velocity fluctuation of the jet increases rapidly and seems to reach a self-similar state with the increase of wave height. Based on the present results, the effect of wave phase on the mean velocity field is not significant, however, its effects on the shape and magnitude of the turbulent field in the near-exit region (potential core and near field) are marked when a jet is under a wave environment.

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