Despite almost 60 years of active research on jet noise, the noise generated by expulsion of hot gases at the exhaust of aircraft engines remains an important part of the total aircraft noise. This is particularly true in the case of supersonic aircrafts, where the high speed of the exhaust gases yields extremely high noise. In the framework of the development of future civil supersonic aircraf...

Aircraft recycling can be considered as an important step on the path to sustainable aviation, valuable resources used in aircraft construction returned for use a circular economy by these activities. Our results have shown that market is emerging with great future relevance due increasing number of retirements expected future. The costs per vary class and engines. range from USD 109,000 twin-e...

An analysis was conducted to examine the market visibility of small aircraft as a transportation mode in competition with automobile and scheduled commercial air travel by estimating the pool of users that would potentially switch on-demand air travel due to cost/time saving. These new aircraft greatly increase the practicality of regional aircraft as a transportation mode that can avoid the co...

Ergonomic evaluation of visual demands becomes crucial for the operators/users when rapid decision making is needed under extreme time constraint like navigation task of jet aircraft. Research reported here comprises ergonomic evaluation of pilot's vision in a jet aircraft in virtual environment to demonstrate how vision analysis tools of digital human modeling software can be used effectively ...

We report noise measurements for perfectly expanded coaxial jets composed of a supersonic primary stream at velocity of 920 m/s and a co ow stream at conditions designed to prevent formation of Mach waves. Both the primary and secondary streams consisted of helium–air mixtures to simulate approximately the conditions of hot  ows. The resulting sound Ž eld was compared to that emitted by a sin...

A disturbed combustion process in an aircraft engine has impact on the internal flow and leads to specific irregularities species distribution exhaust jet. Measuring this provides information about state offers possibility reduce down-time during inspection. The approach potential improve resource management as well availability safety of system. Aim research project is evaluate by analyzing em...

Abstract Motivated by the growing concerns for noise emissions generated interaction between engine jet and airframe surfaces consequent to progressive increase of by-pass ratio in commercial aircraft architectures, we study estimation far-field radiated a an installed configuration based on sensor readings near field jet. We carry out experimental investigation jet-surface phenomena simplified...

Aircraft do not fly through a vacuum, but through an atmosphere whosemeteorological characteristics are changing because of global warming. The impacts of aviation on climate change have long been recognised, but the impacts of climate change on aviation have only recently begun to emerge. These impacts include intensified turbulence and increased take-off weight restrictions. Here we investiga...

Aircraft do not fly through a vacuum, but through an atmosphere whosemeteorological characteristics are changing because of global warming. The impacts of aviation on climate change have long been recognised, but the impacts of climate change on aviation have only recently begun to emerge. These impacts include intensified turbulence and increased take-off weight restrictions. Here we investiga...