文献类型：期刊文献

中文题名：壁面结构参数对液膜厚度分布及其波动特性的影响

英文题名：Effect of Wall Structure Parameters on Liquid Film Thickness Distribution and Its Fluctuation Characteristics

作者：Zeng, Jie[1]; Wang, Yifei[1]; Liu, Qian[1]; Feng, Yue[1]; Li, Qifeng[1]; Jiang, Xiongfeng[1]; Yu, Guangsuo[1]

机构：[1] Institute of Clean Coal Technology, East China University of Science and Technology, Xuhui District, Shanghai, 200237, China

年份：2023

卷号：43

期号：7

起止页码：2752

外文期刊名：Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering

收录：EI(收录号：20231914068659)

语种：中文

外文关键词：Film thickness - Liquid films - Normal distribution - Plates (structural components) - Probability density function - Reynolds number

摘要：Influenced by the uneven distribution of thermal stress, the downcomer’s wall can be deformed, and its effect on the turbulent falling film is very significant. The effect of corrugated plate structural parameters (amplitude and wavelength) on the distribution of liquid film thickness and its fluctuation characteristics are investigated at a high Reynolds number (Rel≈1.72×104) by ultrasonic doppler velocimetry and a high-speed camera. The results show that the mean thickness of the liquid film on the corrugated plate tends to "fluctuation and decrease" with the increase of the axial distance. The "acceleration" effect from the trough to the crest enhances the fluctuation of liquid film, while the "deceleration" effect from the crest to the trough weakens the fluctuation of liquid film. The decrease of the wavelength leads to the resonance effect. The intensification of the liquid film fluctuation promotes the normal distribution of the probability density function of the instantaneous liquid film thickness, and leads to the wire drawing rupture of the liquid film due to Plateau-Rayleigh instability. The modified mean liquid film thickness prediction model can well estimate the mean liquid film thickness under different corrugated walls with a relative error within ± 15%. ?2023 Chin.Soc.for Elec.Eng.