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Research on the Settlement to Avoid Sediment Deposition in the Forebay of a Pumping Station Built on the Sediment-laden River

Author: PengXiaoGuang
Tutor: ZhouJiRen
School: Yangzhou University
Course: Water Resources and Hydropower Engineering
Keywords: Forebay of Pumping Station Silting Measure Model test Numerical Simulation
CLC: TV146
Type: Master's thesis
Year: 2010
Downloads: 47
Quote: 0
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Abstract


Forebay of Pumping Station aqueducts and join segments into the pool , its role is to lead evenly and smoothly spread to the water in the drains into the pool , so that the pumping station of each unit more smoothly into the flow state . The pumping station was built in the sediment-laden river , silting changed the the forebay original good hydraulic conditions deteriorated forebay flow regime and the pump inlet conditions , lead to a decline in the efficiency of the pump installation , will give the pumping station the running and management caused great difficulties . The dredging of the forebay usually is not very effective , because they form a new siltation dredging soon after . Forebay sediment siltation problems through engineering measures to solve water and energy conservation , pumping stations , and improve economic efficiency is important . Yellow River Ningxia solid sea extending irrigation water six pumping stations , for example , the use of anti- siltation measures numerical simulation method combined with model test study forebay . Aspects of model test , similar to the use of flow movement and suspended sediment movement similarity theory , the model scale . Model than the feet and characteristics of the model sediment choose electric sawdust as a test model for sand . Flow state clean water test observation of the original design and the creation of several rectification program , analysis the sediment sludge regional , to draw up the initial program of rectification . Original design and for the rectification of muddy water test , the the measurement measured silt cross-section of sediment distribution , proposed the forebay anti siltation measures . Numerical simulation , using the Gambit software before completion of the pool of the original design and the two rectifiers 3D solid modeling , meshing of the three models , and the partial encryption technology to improve grid quality . The clear water conditions of the original design of the pump station forebay Standar k-ε, RNG k-ε and Realizable k- epsilon turbulence model three-dimensional numerical simulation by numerical simulation results with the experimental values ??obtained Standard k-ε turbulence Numerical results of the model with the experimental values ??are relatively close. Standard k-ε turbulence model of the original design and the proposed rectification program single-phase flow and homogeneous multiphase flow numerical simulation , and analysis of sediment on the flow pattern in the foregoing pool , comparing the rectification program with the original design before pool mud distribution of sand , to proposed the forebay anti siltation measures . The analysis and comparison of model tests and numerical simulation results , put forward a more reasonable the forebay anti siltation measures .

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CLC: > Industrial Technology > Hydraulic Engineering > The basic science of water resources project > Sediment dynamics, River Dynamics > Canal sediment
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