热力透平2024，Vol.53Issue(4)：240-245,6.DOI:10.13707/j.cnki.31-1922/th.2024.04.004
基于冲击冷却改型的燃气轮机静叶传热特性研究
Study on Heat Transfer Characteristics of a Turbine Vane Based on Jet-Impingement Cooling Structure
刘海清 1罗璐 1沈逸文1
作者信息
- 1. 上海电气燃气轮机有限公司,上海 200240
- 折叠
摘要
Abstract
In order to improve the situation of the local high temperature zone at the top of the suction side of a turbine vane and increase its service life,the conjugate heat transfer(CHT)method was employed to optimize the cooling structure of the vane,and its heat transfer characteristics were analyzed.The accuracy of the numerical method was verified by comparing the numerical simulation results of the prototype with the in-service unit.Then six different impingement-cooling arrangements with different arrangements,diameters and numbers of jet holes were proposed and compared.The flow field and heat transfer characteristics of the vane were studied.The results indicated that impingement cooling structure could effectively eliminate the high temperature zone at the top of the suction side of the vane.Due to the influence of the aerodynamic shape of the vane,compared to the uniform-hole layout,the dense-hole layout at the trailing edge could achieve lower surface temperature at a smaller cooling mass flow rate,but the temperature of the vane top was still slightly higher than the surrounding area.Meanwhile,when the cooling flow mass was high,the suction surface root tended to migrate to the 50%of the vane height,leading to cross flow effect.The arrangement of dense-hole layout at the top and the root could reduce the range and maximum temperature value of the high-temperature zone at the top and root of the vane,and could weaken the cross flow effect with high cooling mass flow rate,achieving good cooling effect from the root to 50%of the vane height.Therefore,it was the optimal arrangement to improve the service state of the vane.The research results can provide reference for improving the cooling structure of vanes in the same type of turbines and increasing their service life.关键词
耦合传热/透平静叶/冲击冷却Key words
conjugate heat transfer/turbine vane/impingement-cooling分类
能源科技引用本文复制引用
刘海清,罗璐,沈逸文..基于冲击冷却改型的燃气轮机静叶传热特性研究[J].热力透平,2024,53(4):240-245,6.
