Hydraulic Analysis of Supercritical Flow in Channel Contractions

• Main Authors: Wu, De-Chen, 吳德辰
• Other Authors: Ming-Hsi Hsu
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/95013862861602128862

碩士 === 國立臺灣大學 === 農業工程學系研究所 === 86 === The supercritical flow in channel contractions is very complicated, especially in the case of choking flow . A two-dimensional numerical model has been employed to simulate supercritical flow in channel contractions . The experimental data of Ippen was employed to verify the two-dimensional numerical model . The nondimensional parameters affecting the water depth in rectangular contraction channel were deduced from the dimensional analysis. A series of numerical experiments were carried out to analyze the effects of the nondimensional parameters. As a result, the relations between the ratio of maximum water depth and the parameters are proposed . The experimental data of Ippen and the numerical experiments were both employed to verify the results. The results of this study can be applied to calculate the maximum water depth in channel contractions.