【摘要】 采用iSight优化设计平台构建了1个汽轮机低压排汽缸全三维粘性气动优化设计系统,该系统耦合了参数化建模、CFD分析与组合优化技术.采用该系统分别对具有轴对称和非轴对称2种不同结构导流环的汽轮机低压排汽缸进行了气动优化设计.优化后与原型设计相比,具有轴对称导流环的排汽缸平均静压恢复系数提高了21.21%,具有非轴对称导流环的排汽缸平均静压恢复系数提高了45.46%,表明该系统能有效地提高汽轮机低压排汽缸的气动性能.更多还原

【Abstract】 A 3D viscous aerodynamic optimization system was constructed for low pressure exhaust hood of steam turbine based on iSight optimized design software,it couples with the parameterized geometric model、CFD analysis and combined optimization technique.By this system,dynamical optimization designs were done for a steam turbine exhaust hood with axisymmetric and non-axisymmetric flow guide.Compared with prototype of design,the average static pressure recovery coefficient of the exhaust hood is increased by 21.21% for the one with axisymmetric flow guide and 45.45% for the one with non-axisymmetric flow guide respectively after optimization.It shows that the optimization system is beneficial to the performance improvement of steam turbine low pressure exhaust hood.更多还原