| Popis: |
Based on hydraulic and acoustic theory, a model test of broad-crested weir was carried out, and the fluctuating pressure and corresponding noise values of stilling pool base slab were measured and recorded with three schemes of different flow rates. The results showed that the fluctuating pressure and noise value of water flow increased with the increasing of flow rate, the fluctuating pressure have certain correlation with the noise value, where the largest fluctuating pressure appeared had the same section with the noise value, yet the fluctuating pressure change trend was not identical to the noise value. The main reasons of producing flow noise were the interaction of flow and solid bottom and the flow turbulence. |
