摘要
针对目前工业汽轮机效率不高,静叶叶型能量损失偏大等问题,利用计算流体力学(CFD)软件NUMECA对汽轮机静叶栅的叶片型线参数进行数值分析及优化。结果表明,与原始叶型相比,"后部加载"叶型的静压系数分布最佳,有效推迟了转捩点位置;减弱了叶片吸力面表面径向压力梯度,有效控制径向二次流损失;叶栅内流场流动状况较好;总压损失系数最小,平均总压损失系数仅为1.03%;等熵效率最高,为94.462%,单级效率提高了14.33%。优化的"后部加载"叶型明显提高了气动性能,降低了叶型能量损失。
To reduce the stator profile loss and improve the efficiency of the industrial steam turbine,a numerical analysis and optimization of the data for the steam turbine stator blade are conducted by the NUMECA,a CFD software.The result shows that,compared with the original blade,the ＂after loading＂ blade is with the best static pressure coefficient distribution,and effectively postpones the transition point position,reduces the radial pressure gradient of suction surface,and cut down the secondary flow loss effectively.The total pressure losses of the ＂after loading＂ blade is 1.03%,which is the least,and the single-stage efficiency is 94.462%,which is the maximum and increases 14.33%.Thus,the aerodynamic performance of stage is im-proved obviously,the profile loss decreases through using the ＂after loading＂ blade.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2010年第2期98-102,112,共6页
Nuclear Power Engineering
基金
河南省重大公益性科研招标项目(081100910100)
