When the common bottom aeration facilities is used, the downstream sidewalls near the anti-arch section still has big-range un-airflow area so that it is easy to cause cavitation damage.

• 采用常见的底部掺气设施时,反弧段下游附近边墙仍存在较大范围的掺气盲区,从而反弧段下游边墙容易产生空蚀破坏。