热力发电2023，Vol.52Issue(11)：57-66,10.DOI:10.19666/j.rlfd.202302019
壁面粗糙度对超临界二氧化碳透平性能影响数值研究
Numerical investigation on the wall roughness of a supercritical carbon dioxide axial turbine
摘要
Abstract
A comparative analysis between simulation and test with roughness is carried out for a supercritical carbon dioxide(S-CO2)axial turbine with different operating conditions,focusing on the roughness impact of the turbine performance.The results show that the numerical calculation method of wall roughness is able to assess the performance of the turbine at different load conditions accurately.Compared with test result,the maximum efficiency error is 1.82 percentage point.Wall roughness degrades the overall performance of the turbine,with a maximum efficiency drop of 2.8 percentage point at Ral.6 roughness level during the five working condition,and the turbine stage roughness has a more obvious effect on the turbine performance.In addition,the more severe of wall roughness,the greater reduction of turbine efficiency.In non-design operating conditions,the efficiency drops by 11.6 percentage point at Ra6.3 roughness level.The wall roughness exacerbates flow separation of pressure surface,causing greater friction losses and serious affecting of turbine performance.The research can provide technical support for the design and performance simulation of S-CO2 axial turbines.关键词
超临界二氧化碳/轴流透平/壁面粗糙度/试验测试Key words
supercritical carbon dioxide/axial turbine/wall roughness/experiments引用本文复制引用
王磊,霍文浩,唐国庆,但光局,孙冬婷,李扬,文俊..壁面粗糙度对超临界二氧化碳透平性能影响数值研究[J].热力发电,2023,52(11):57-66,10.基金项目
国家重点研发计划项目(2018YFB1501004-4)National Key Research and Development Program of China(2018 YFB1501004-4) （2018YFB1501004-4）
