Cavitation erosion resistance of Armco iron was studied using a tunnel equipped with a system of barricades at two flow conditions, inlet pressure of 1000 and 1200 kPa, and outlet pressure of 125 and 130 kPa, respectively. In order to analyse the mechanism of mass losses, numerical investigations concerning the flow behaviour in the vicinity of the samples were carried out. After 480 min of testing, the increase in inlet pressure from 1000 to 1200 kPa caused an approximately two-and-a-half-fold increase in the erosion rate of samples located closest to the upper barricade that served together with the lower barricade as a cavitation generator. The surface degradation depended on the test conditions: for the test at 1000 and 125 kPa, single pits were formed, while for the test at 1200 and 130 kPa, a large number of pits contributed to the formation of micro-undulation on the entire surface of the sample. Taking into account the time required for the water stream to reach samples’ surface from the low-pressure region and erosion rates, an exponential correlation with a determination coefficient R² = 0.9247 was obtained. The erosion rate also increased exponentially with turbulence intensity and turbulent dissipation rate. The study of turbulence intensity showed that as the turbulent velocity fluctuations are larger than the mean velocity, the erosion rate increases more intensively, which indicates an increase in the aggressiveness of cavitation.

在两种流动条件下，入口压力分别为 1000 和 1200 kPa，出口压力分别为 125 和 130 kPa，使用配备有路障系统的隧道来研究 Armco 铁的抗空蚀性。为了分析质量损失的机制，对样品附近的流动行为进行了数值研究。测试 480 分钟后，入口压力从 1000 kPa 增加到 1200 kPa 导致位于最靠近上路障的样品的侵蚀速率增加了大约两倍半，这些样品与下部路障一起用作气穴发生器。表面退化取决于测试条件：在 1000 和 125 kPa 的测试中，形成单个凹坑，而在 1200 和 130 kPa 的测试中，大量的凹坑有助于在整个样品表面形成微起伏。考虑到水流从低压区到达样品表面所需的时间和侵蚀速率，与确定系数呈指数相关获得R ²  = 0.9247。侵蚀率也随着湍流强度和湍流耗散率呈指数增加。湍流强度研究表明，随着湍流速度波动大于平均速度，冲蚀速率增加更强烈，这表明空化的侵袭性增加。