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通过实验研究了不掺气射流冲击水垫塘入射点旋涡掺气的特性。实验结果表明：空气从射流入射点被卷入后，沿射流剪切层扩散；入射点掺气浓度随水垫深度的减小而增加；剪切层内水气混合体的流速分布具有误差函数形式；在剪切层内、外区，其掺气浓度分别符合高斯分布，与理论计算吻合良好。另外，还从理论上导出了射流入射点附近水气混合层的厚度，并给出了计算掺气量的公式。
The characteristics of vortex aeration at the incident point of plunge pool impinging on the impinging jet were studied experimentally. The experimental results show that the air diffuses along the jet shear layer after the air is incident from the jet incident point. The concentration of air in the incident point increases with the decrease of the water jet depth. The flow velocity distribution of the air-water mixture in the shear layer has an error function In the shear zone, the aeration concentration in the shear zone accords with Gaussian distribution, which is in good agreement with the theoretical calculation. In addition, the thickness of the water vapor mixed layer near the jet incident point is theoretically deduced, and the formula for calculating the air entrainment volume is given.