Numerical Simulation and Analysis on Wake Vortex and Horse-shoe Vortex Induced by a Submerged Vane

• Main Authors: Yu-Long Chang, 張雨龍
• Other Authors: Huei-Tau Ouyang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/17675833627991228622

碩士 === 國立宜蘭大學 === 土木工程學系碩士班 === 101 === Submerged vane caused by a complex three-dimensional flow field. Known horseshoe vortex erosion is caused by the main hydraulic structures, for hydraulic structures have an important impact on the stability. Submerged vane is also one of Submersible hydraulic structures, so that will cause stability problems. Wake vortex is that indicator of vane effectiveness.This study mainly through computational fluid dynamics software FLUENT to explore the three-dimensional flow field quantitative characteristics of vane. Analysis of the variables on the plate produce horseshoe vortex and wake vortex relations. Flume experiment data and simulation results comparing the error to determine the selection of the turbulence model and mesh distribution.The simulation results show that standard k-εmodel is more suitable for submerged vane flow field numerical simulation. When vane’s length per height larger horseshoe vortex and the area affected will also be larger. When vane angle increases, the horseshoe vortex and the area affected is slightly reduced, but effect is not obvious. For wake vortex, vane's l/hdesign between about 0.5 to 1, angle design between 15 to 20 degrees.