摘要
通过CFD数值模拟仿真,基于改进Kriging代理模型,结合参数化自动建模,建立扩压器优化平台,以扩压器轴承锥型线为优化对象,低压缸末级等熵总总效率为优化目标,对扩压器进行优化研究。研究结果表明:在不改变汽轮机排汽系统缸体形状和几何尺寸的情况下,仅通过改变扩压器轴承锥的几何外形,可以进一步提高汽轮机末级效率。
Based on improved Kriging proxy model and combined with parametric automatic modeling,the diffuser optimization platform is set up through CFD numerical simulation.For the optimal objective of geometric shape of diffuser bearing and total isentropic efficiency of low pressure cylinder last stage,the optimization research for diffuser is conducted.The results show that the last stage efficiency of steam turbine can be further improved only by changing geometric shape of bearing cone of diffuser instead of changing the shape and geometric size of cylinder block of steam turbine exhaust system.
作者
谭锐
吴亚东
沈昕
黄亚振
徐星
TAN Rui;WU Yadong;SHEN Xin;HUANG Yazhen;XU Xing(Guodian Science and Technology Research Institute,Nanjing 210046,China;School of Mechanical and Power Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《热力透平》
2020年第3期196-200,246,共6页
Thermal Turbine
关键词
汽轮机
扩压器
几何优化
steam turbine
diffuser
geometric optimization
