转子偏心对轴流涡轮气动性能的影响
Influence of Rotor Eccentricity on the Aerodynamic Performance of an Axial Flow Turbine
邓啟家 1王晓东 1康顺 2林鹏 1蔡虎3
作者信息
- 1. 华北电力大学电站设备状态监测与控制教育部重点实验室,北京102206
- 2. 华北电力大学电站设备状态监测与控制教育部重点实验室,北京102206;西安现代控制技术研究所,陕西西安710065
- 3. 北京全三维能源科技股份有限公司,北京100190
- 折叠
摘要
以Aachen 1.5级轴流亚音速实验涡轮为研究对象,采用商用NUMECA软件包对其转子偏心旋转时的流场进行三维定常模拟.研究在大流量工况下,平均叶顶间隙高度比(平均叶顶间隙高度与叶片高度的比值)分别为0.7％、1.3％、1.9％时转子偏心对涡轮性能的影响.在经过验证与确认的基础上,对结果进行了分析.研究结果表明:转子偏心会减小涡轮进口流量,其影响程度与偏心距和平均叶顶间隙高度有关,偏心距越大变化幅度越大;转子偏心对涡轮等熵效率和总功率的影响与偏心距和平均叶顶间隙高度有关,转子偏心有可能增大等熵效率和总功率,也有可能减小等熵效率和总功率,但其变化幅度随着偏心距的增加而增大.
Abstract
3D steady numerical simulations on eccentric rotor in Aachen 1.5 axial flow turbine stages are performed with commercial CFD software NUMECA.In order to explore the aerodynamic performance changes of tnrbomachinery respecting to the eccentric rotor,simulations on three large flow conditions have been performed.The average blade tip clearance height ratio are 0.7％,1.3％ and 1.9％,respectively.The results are analyzed on the basis verification and validation.The results show that the eccentric rotor will reduce turbine inlet flow,the influence is related with eccentricity and average tip clearance height,and the changes increase with the increase of eccentricity; the variation of isentropic efficiency and total power are related with eccentricity and average tip clearance height,eccentric rotor may increase them on some average tip clearance height,and may also reduce them,but the change amplitude with the increase of eccentricity increases.
关键词
轴流涡轮/偏心/激振力/气动性能/数值模拟Key words
axial flow turbine/eccentricity/self-excited force/aerodynamic performance/numerical simulation引用本文复制引用
出版年
2013
NETL
NSTL
维普
万方数据