Variation of pressure distribution downstream of free overfall due to different dissipation arrangement

• Main Authors: Chien-wen Tsai, 蔡建文
• Other Authors: Jen-Yan Chen
• Format: Others
• Language: zh-TW
• Published: 1993
• Online Access: http://ndltd.ncl.edu.tw/handle/36889707744916194963

碩士 === 國立中興大學 === 土木工程研究所 === 81 === Based on the previous experimental studies for free over- fall, the main influencing factors of the local scour down- stream of the drop structure are the position of nappe and the force density on channel bed. In this research, the pressure transducer and strain amplifier, which do not disturb the flow field, were set up. The pressure distribution along the streamwise direction downstream of the weir were measured through an A-D converter, and compared with the data collected by Moore and Rand. The energy decay under different void ratios for experiments with various dissipation block arrange- ments were investigated. Finally, the influences of the po- sition of end sill on the flow field and energy dissipation were alsostudied experimentally.