Erosion behaviour of turbine rotor blades installed in the Krsko nuclear power plant
Erosion behaviour of turbine rotor blades installed in the Krsko nuclear power plant
复制标题
克尔斯科核电站涡轮转子叶片的腐蚀行为
DOI：
10.1016/s0043-1648(03)00260-6
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
K. Grilec
中科院分区：
文献类型：
--
作者：
B. Staniša;Z. Schauperl;K. Grilec
安装在核电站中的涡轮机以湿蒸汽运行。湿蒸汽的流动会导致末级转子叶片的磨损，并会对凝汽式汽轮机造成相当大的损坏。本文回顾了多年来对Krsko核电站664 MW汽轮机转子叶片冲蚀行为及其机理的监测和研究结果。根据得到的结果和冲蚀过程的特点，估算了叶片材料的冲蚀速率和使用寿命的简化模型。将叶片冲蚀过程划分为三个特征冲蚀区：第一孕育区对叶片材料无明显损伤，第二区冲蚀速率最大，第三区冲蚀最小。已确定，转子叶片在其使用寿命内主要在冲蚀率较低的第三区域运行。根据得到的叶片冲蚀过程的特性，通过简化模型和计算，估算出叶片的使用寿命为29万小时，比预期的要长。
Turbines installed in nuclear power plants operate with wet steam. The flow of wet steam causes the erosion of the last stage rotor blades, and can cause a considerable damage to the condensing steam turbines. This paper reviews the results of many years of monitoring and researching of the behaviour of the erosion process and its mechanism for rotor blades of 664MW turbine installed in Krsko nuclear power plant. On the basis of the results obtained and behaviour of the erosion process, the erosion rate for rotor blades material and a simplified model for their service life is estimated. The rotor blade erosion process was divided into three characteristic regions of erosion: the first incubation region showed no evident damage to the blade material, the second region with the maximum erosion rate and the third one with the lowest erosion. It was established that the rotor blades during their service life mostly operate in the third region with a lower rate of erosion. On the basis of the obtained behaviour of the rotor blades erosion process and a simplified model and calculation their service life of 290,000h has been estimated, which is longer than it was expected.