| Summary: | 碩士 === 國立宜蘭大學 === 土木工程學系碩士班 === 96 === Submerged vane is a technique on stable the river bank. It has well performance on streambank protection and sediment control. Submerged vane system is a series of vanes installed follwoing the flow direction or parallel along a river cross-section to increase the performance. Previous researchers have shown that the performance of the submerged vane system is related to the number of the vanes ,the angle of attack ,the installing position ,and the size of the vane. However, not much for the optimal planform of the vane and optimal configuration of the submerged vane system are investigated. The study utilize the Lifting-Panel Method for the calculation of the flow field induced by the vane system. By adopting previous research’s bend flow model, the method is capable of calculating the transverse bed profile induced by vanes with various shapes and dimensions. The study investigated the following three types of submerged vane systems：1.rectangle vanes;2.forward-swept vanes; 3.tapered vanes.
The results show that the optimal location of a single vane for these three types of vanes are almost the same. Upon the others, the tapered vane has the best performance. The interaction among the vanes increased with increasing angle of attack of the vanes and the tapered vane has the most difference between vanes. By increasing the number of the vanes the function of the vanes on sediment control is improved. For the three types of vanes, the tapered vane has the best performance the sediment control.
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