[关键词]
[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RNG k~?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q0=21.43 l/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5.5 cm、栅高为10 cm,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12 cm、层距为4 cm,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。
[Key word]
[Abstract]
The suspended bars in the stilling basin can improve the energy dissipation effect of the stilling basin but are eroded and damaged by water currents. To study the effect of water currents on the stability of the suspended bars, we obtained the optimal layout patterns of the single- or double-layer suspended bars. We conducted washout tests with the optimal layout patterns. At the same time, we used the RNG k-ε double-equation turbulence model to do numerical simulation computation and compared the test results. We found that when the design value of per-unit-width discharge q0=21.43 l/s, the optimal layout pattern of single-layer suspended bars is 11 bars with a bar spacing of 5.5 cm and a height of 10 cm. In this model, the first bar was scoured seriously, with its stability greatly compromised. The optimal layout pattern of double-layer bars is 11 bars with a bar spacing of 12 cm and a height of 4 cm. In this model, the first bar and the bottom layer were scoured seriously with their stability greatly compromised. The study results can be used to improve the structure of the suspended bars.
[中图分类号]
[基金项目]
国家自然科学基金项目(51469031);新疆研究生科研创新项目(XJGRI2015094)