Experienceouerthepasttenyearsinvibration and cabin noise control of new airplane jemgine systems Is summarized. why the newer systems required more stigent control is discussed. he transitionfrom single plane balance methods, in cmnnwn use on older systems, to conventional 2.plane influence coefFcient @.C.J methods, and then to optimized 2-p&e LC. methods is described. Examples of residual unba...

Most of the industrial software codes used for the prediction of the radar cross-section (RCS) of aircrafts are based on ray tracing. While ray based methods give useful scattered fields from the skin of the aircraft illuminated by an incident plane wave, they largely fail to predict the returns from cavities onboard. As a possible enhancement to these ray-tracing programs, an auxiliary program...

High thermal stability enables engine manufacturers to increase the reliance on fuel as a heat sink while reducing air, which wastes energy used compress it or increases aircraft drag. While direct impact of waste recovery can translate into an savings 0.2% if maximum temperature limit is increased 160 °C (from 127 °C), there larger from variety options improve efficiency engine. In this work, ...

I. Introduction: Challenges in energy savings for turbines engines Nickel-based superalloys can withstand high temperatures and severe oxidizing conditions, while maintaining superb mechanical properties. Because of this, they are widely used for aerospace and power generation applications. Since higher operating temperature leads to greater cycle efficiency, there are economic and environmenta...