渥奇段的空化噪声与空化特性

通过对渥奇段的空化噪声的量测与分析，发现渥奇段的空化易发生在壁面曲率的沿程变化明显增大的部位；水流空化数与空化噪声的沿程变化趋势一致；空化发生的位置和程度与运行工况、凸体位置和高度有关；渥奇段的空化为体型分离型，初生空化数约为0．2左右。

The Cavitation Noise and Characteristics in the Paraboloid of Spillway Tunnel

it is found through the measurement and analysis of cavitation noise in the paraboloid of spillway tunnel that the cavitation noise in the paraboloid can easily occurs in the location where the variation of curvature become obviously great along the paraboloid. The tendency of cavitation noise changes correspondingly in agreement with that of flow cavitation numbers along the paraboloid. The cavitation position and level are related with the operation manner of the spillway tunnel and with the position and height of the bulge body in the paraboloid. The paraboloid cavitation pattern is an isolated type; and the initial cavitation number is 0. 2 or so.