摘要
通过分析水轮机转轮流态,确定不同流态下水轮机工作状态。通过计算叶栅前后速度差,确定转轮过流截面平均速度,在相同的单位转速及效率条件下,分析过流能力与单位流量之间的关系,以此优化水轮机叶栅稠密度。分析叶片扭角、单位转速与单位流量之间的关系,确定轮缘及轮毂截面相对半径,以此优化叶片扭角参数。计算转轮圆柱截面轴向速度,优化叶片厚度参数。由仿真实验结果可知,该方法在轮毂空蚀和桨叶空蚀情况下,水轮机最终运行速度比优化前分别快2.2和6.1 m/s,具有较好的优化效果。
A turbine was selected as the research object in this paper, and the working state of water turbine under different flow state was determined by analyzing the rotation state. The average velocity of runner cross section was determined by calculating the velocity difference between front and rear of cascade. At the same unit speed and efficiency, the relationship between flow capacity and unit flow rate was analyzed to optimize cascade density. Simultaneously, the relationship between blade twist Angle and unit speed with unit flow rate was analyzed, and the relative radius of section of rim and hub was determined to optimize blade twist Angle parameters. The axial velocity of the cylindrical section of the runner was calculated, and the blade thickness parameters were optimized. The simulation results showed that under the condition of hub cavitation erosion and blade cavitation erosion, the final running speed of hydraulic turbine was 2.2 and 6.1 m/s faster than that before optimization, which had a good optimization effect.
作者
王子伟
孟宪宇
胡波
龚登位
张俊航
刘青红
WANG Zi-wei;MENG Xian-yu;HU Bo;GONG Deng-wei;ZHANG Jun-hang;LIU Qing-hong(Huaneng Lancang River Hydropower Co.,Ltd.,Kunming 650214,Yunnan Province,China;Nanjing NR Electric Co.,Ltd.,Nanjing211102,Jiangsu Province,China;Xiʹan Thermal Engineering Research Institute Co.,Ltd.,Xiʹan 710054,Shaanxi Province,China)
出处
《中国农村水利水电》
北大核心
2023年第1期216-219,共4页
China Rural Water and Hydropower
关键词
水轮机
转轮
参数优化
过流
Turbine
Runner
Parameter optimization
Over current
