Anti-scouring ability of suspended bars during water scouring of suspended-bar stilling basin
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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.
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