悬栅消力池内水流冲刷过程中悬栅抗冲刷研究

发布时间：2018-07-25 09:49

【摘要】：悬栅布置在消力池内,提高消力池消能效果的同时又受水流的冲刷和破坏,为研究水流对悬栅的稳定性影响情况,通过模型试验得到单、双层悬栅较优布置型式,并在较优布置型式下进行冲刷试验,同时采用RNGk~ε双方程紊流模型进行数值模拟计算,对比验证试验结果,得到在单宽流量设计值q_0=21.43L/s所对应的消力池内单层悬栅较优布置型式为栅条数为11根、栅距为5.5cm、栅高为10cm,第1根悬栅受水流冲刷严重,稳定性影响较大;双层悬栅较优布置型式为栅条数为11根、栅距为12cm、层距为4cm,第1根悬栅和下层悬栅受水流冲刷严重,稳定性影响较大,可以为悬栅的结构设计提高依据。
[Abstract]:In order to study the influence of water flow on the stability of suspension grid, the optimal layout of single and double suspended grids is obtained by model test. The suspended grid is arranged in the stilling pool to improve the efficiency of energy dissipation and at the same time it is scoured and destroyed by the water flow. At the same time, the scour test is carried out under the better arrangement, and the numerical simulation is carried out by using RNGk- 蔚 turbulent model, and the test results are compared and verified. The results show that the optimal layout pattern of single-layer suspension grid in the stilling pool corresponding to the design value of single wide flow q_0=21.43L/s is that the number of grid bars is 11, the grid spacing is 5.5 cm, the gate height is 10 cm, and the first suspension grid is seriously washed away by the flow, and the stability is greatly affected. The optimum arrangement type of double-layer suspended grid is that the number of grid strips is 11, the grid spacing is 12 cm, and the layer spacing is 4 cm. The first suspension grid and the lower suspended grid are washed seriously by the current, and the stability is greatly affected, which can be used to improve the basis for the structural design of the suspended grid.
【作者单位】：新疆农业大学水利与土木工程学院;
【基金】：国家自然科学基金项目(51469031) 新疆研究生科研创新项目(XJGRI2015094)~~
【分类号】：TV653.1

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