中国电机工程学报Issue(5)：778-783,6.DOI:10.13334/j.0258-8013.pcsee.2014.05.010
基于量纲分析的汽轮机调节级变工况特性研究
Research on Varying Condition Characteristic of Steam Turbine Governing Stage Based on Dimensional Analysis
马琳 1胥建群 1曹祖庆1
作者信息
- 1. 能源热转换及其过程测控教育部重点实验室 东南大学，江苏省 南京市 210096
- 折叠
摘要
Abstract
Based on APROS support platform, the thermodynamic calculation of nozzle governing stage was taken, and verified through the comparison of test data which the literature offered. Moreover, the influence of partial admission on pressure ratio was analyzed, and the trend of governing stage efficiency with different partial admission degrees was also obtained. The results show that partial admission not only lead to partial admission losses, but also make an impact on pressure ratio, enthalpy and reaction degree, and finally affect the efficiency. Meanwhile, a simplified efficiency model considering the influence of partial admission on a 600 MW steam turbine was built. Then, the nozzle pressure ratio after full open valve and half one respectively, was expressed as a function of flow ratio based on dimensional analysis. this paper introduced a new method for thermodynamic calculation of nozzle governing stage. Comparing with the calculation by means of support platform, and discussing the change of pressure ratio and reaction degree, it shows that the method can reflect the influence of partial admission on pressure ratio, and further improve the accuracy of existing thermodynamic calculation.关键词
调节级/部分进汽/变工况/量纲分析/压比Key words
governing stage/partial admission/varying condition/dimensional analysis/pressure ratio分类
能源科技引用本文复制引用
马琳,胥建群,曹祖庆..基于量纲分析的汽轮机调节级变工况特性研究[J].中国电机工程学报,2014,(5):778-783,6.
