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针对竖直管内不同工况下气液两相搅拌流内的大振幅界面波特征参数(波形、波幅、波长和频率等)及运动特性进行了实验研究,系统分析了流动参数对大振幅界面波特征参数及运动特性的影响规律。结果表明:由于重力和气流剪切力在大振幅界面波不同运动阶段的影响程度不同,大振幅界面波在运动过程中存在与气流先逆向后同向的运动特点,证明了液泛现象普遍存在于搅拌流内,揭示了造成搅拌流液膜振荡剧烈的原因;搅拌流内,大振幅界面波波形符合正态分布函数特征,且波幅较环状流内扰动波波幅大,但是波幅和波长变化趋势与环状流内扰动波变化趋势相似,即波幅和波长随着气速的增大而减小,随液量的增大而增大,且当气速较小时,临界波幅随着液量的增加逐渐趋于定值;而大振幅界面波平均产生频率随气速和液速的增大而增大。
In order to study the characteristics of large amplitude interface wave (waveform, amplitude, wavelength and frequency) and kinematic characteristics of gas-liquid two-phase agitated flow under different working conditions in vertical tube, the effects of flow parameters on large amplitude interface wave The influence of characteristic parameters and movement characteristics. The results show that due to the different degrees of influence of gravity and airflow shearing force in different stages of large amplitude boundary wave, the movement characteristics of large amplitude interface wave are in the same direction as the first flow, In the agitated flow, the reason why the agitated liquid film oscillated violently was revealed. The waveforms of the large amplitude interface wave aggravated by the normal distribution function in the agitated flow and the amplitudes were larger than those in the annular flow. However, the changes of the amplitude and the wavelength The tendency is similar to that of the disturbance wave in the annular flow, in which the amplitude and the wavelength decrease with the increase of the gas velocity and increase with the increase of the liquid flow rate. When the gas velocity is small, the critical amplitude changes with the increase of the liquid amount While the average frequency of large amplitude interface wave increases with the increase of gas velocity and liquid velocity.