关键词: 燃气涡轮发动机, 分析法, 中冷回热技术, 尾流损失

Abstract:

In order to find out the exergy loss of aero-engines,and to reveal the weakest chain of the exergy utilization,this article analyzes the exergy efficiency of single-spool turbo engine,turbofan engine and the intercooled and recuperated turbofan engine. The calculation results prove that the exergy loss during the wake equilibration process is the largest part of the exergy loss,which is more than one third of the overall exergy.The second largest part of the exergy loss is in the combustion chamber. When the intercooled and recuperated components are applied,the entire exergy efficiency can be better,what's more,the exergy loss during the wake equilibration process is significantly reduced. By analyzing the exergy efficiency of different types of aero-engines,this article will contribute to the design and improvement of the future aero-engines.

Key words: gas turbine engine, exergy efficiency, intercooled and recuperated aero-engine, wake loss