汽轮机低压缸末级长叶片水蚀研究  

Research on Water Erosion of Last Stage Long Blades in Low Pressure Cylinder of Steam Turbine

作　　者：杨建道 Yang Jiandao(Shanghai Turbine Works Co.,Ltd.,Shanghai 200240,China)

机构地区：[1]上海汽轮机厂有限公司,上海200240

出　　处：《发电设备》2022年第4期235-240,248,共7页Power Equipment

摘　　要：以某汽轮机低压缸末级长叶片为研究对象,通过数值计算的方法并结合粒子输运模型,探究了末级长叶片在不同工况下的制动力和制动损失,给出了各叶高段所受到的气动压力和水锤压力。结果表明:末级动叶顶部为二次水滴冲击最严重的区域;在小容积流量工况下,末级长叶片将承受更严重的水蚀。Taking the last stage long blades in the low pressure cylinder of a steam turbine as a research object,combined with the numerical calculation method and the particle transport model,researched were conducted on the braking force and braking loss of the last stage long blades under different working conditions,while the aerodynamic pressure and water hammer pressure of each blade height section were given.Results show that the worst region influenced by the water erosion is the top part of the last stage blade,and the more severe water erosion would occur in the last stage long blades under small volume flow condition.

关 键 词：汽轮机 低压缸 长叶片 水蚀 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]