摘要
为了尽可能减少燃油消耗,并进一步降低使用成本和环境影响,航空发动机需要保持较高的整机效率。由于涡轮间隙严重影响涡轮效率,为消除其不利影响,分析了叶尖间隙形成和变化的机理及主要影响因素,重点综述了3种不同的主动间隙控制系统的控制方法及其技术特点,总结了主动间隙控制在提高整机效率、降低燃油消耗、减少排放、降低维护费用等方面的巨大收益,并对主动间隙控制技术的关键技术和未来发展方向进行了讨论。认为国内需要认识到主动间隙控制技术的重要性并大力开展其关键技术研究。
In order to minimize fuel consumption,reduce operating costs and lower environmental impact,turbofan engines must be of high overall efficiency.Provided turbine tip clearance dramatically influenced turbine efficiency,in order to eliminate the negative influence,mechanisms of tip clearance formation and variation and relevant main influence factors were analyzed.Three different active clearance control （ACC） systems were reviewed.Benefits of ACC systems are summarized as lower fuel consumptions,less emissions and lower maintenance costs due to efficiency improvement.Furthermore,key technologies of ACC and the future directions were also discussed.As a result,ACC technology considered as key aspect of modern gas turbine needs to be well investigated and developed in China.
出处
《航空发动机》
2014年第6期73-78,共6页
Aeroengine
关键词
主动间隙控制
叶尖间隙
涡轮
整机效率
航空发动机
active clearance control
tip clearance
turbine
overall efficiency
aeroengine
