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利用掺气坎在水中强迫掺气形成水气两相流，其压力脉动属于平稳，各态历经随机过程。水气两相流对泄槽底部冲击所产生的压力幅值谱基本符合高斯分布，最大脉压幅值在冲击点附近，其后很快衰减，约在（１０～１５）倍坎高范围内降至无坎时的幅值。在频谱中具有较明显的优势频率，模型中其值约为１．２４Ｈｚ。脉动能量主要集中在低频段，其优势频带约在０～１８Ｈｚ，除优势频率外，水气两相流的频域相干性较差，相干系数均在０．５以下，这与单一流体的相干结构大为不同。
The aeration hurdle is forced to aerate to form a gas-water two-phase flow. The pressure pulsation is stable and the states undergo a random process. The pressure amplitude spectrum produced by the two-phase flow of water and gas on the bottom of the gutter basically conforms to the Gaussian distribution. The maximum pulse pressure amplitude is near the impact point and then decays rapidly, which is about (10 ~ 15) times the hight range When there is no hurdle amplitude. In the spectrum has a more obvious dominant frequency, the value of the model is about 1.24Hz. The pulsating energy is mainly concentrated in the low frequency band, and its dominant band is about 0 ~ 18Hz. In addition to the dominant frequency, the frequency domain coherence of the water-vapor two-phase flow is poor with the coherence coefficients below 0.5, which is related to the single fluid The structure is very different.