The Future of Commercial Air Transport and Aeroengines: Challenges and Opportunities
The aeroengines have been the subject of continuous development for the past fifty years with considerable improvements in fuel efficiency, power density, exhaust emissions, decreased noise and better reliability. All these changes have been brought due to incremental improvements in engine cycle, combustion, turbine cooling, acoustics and materials technology.The main challenges for the future are not only technological and economical but also related to societal concerns. For instance, noise and emissions are becoming a major concern.In terms of materials, there is a constant need for developing new affordable materials, or materials systems such as thermal barrier coatings on single crystal superalloys in order to achieve higher TET but not at the expense of increased NOx, at least in commercial engines. The use of MMC's and CMC's in some parts of the engine will become possible due to a considerable improvement in processing and lifing methodologies.
Yafang Han et al.
T. Khan and P. Kuentzmann, "The Future of Commercial Air Transport and Aeroengines: Challenges and Opportunities", Materials Science Forum, Vols. 546-549, pp. 1171-1178, 2007