Results 31 to 40 of about 1,323,656 (256)
Future Aircraft and the Future of Aircraft Noise [PDF]
, 2022 AbstractIn order to cope with increasing air traffic and the requirement to decrease the overall footprint of the aviation sector—making it more sustainably and acceptable for the whole society—drastic technology improvements are required beside all other measures.
Umberto Iemma +3 more
openaire +4 more sources
Validity Of aircraft noise data [PDF]
The Journal of the Acoustical Society of America, 1974 An analysis of noise measurements taken at various distances from a number of aircraft during FAR 36 certification conditions is presented. Data scatter is shown to increase with distance and with decreasing aircraft/observer angle. Data normalization techniques, utilizing current standards, are inadequate at large distances and low airplane/observer ...
C. A. Sekyra, W. C. Storey, R. Yates
openaire +1 more source
System Noise Assessment and Uncertainty Analysis of a Conceptual Supersonic Aircraft
Aerospace, 2022 This paper describes a system noise assessment of a conceptual supersonic aircraft called the NASA 55t Supersonic Technology Concept Aeroplane (STCA), its prediction uncertainty, and related validation tests.
Junichi Akatsuka, Tatsuya Ishii
doaj +1 more source
Review on dynamics design techniques of propeller engine installation system
Hangkong gongcheng jinzhanWith the acceleration of propeller engine installation system's localization，the relevant technical research of installation system must be carried out，in which the dynamics design is one of the important parts. The dynamic performance characteristics of
CHEN Yonghui +5 more
doaj +1 more source
CURRENT STATE OF THE PROBLEM OF THE DEVELOPMENT OF ACOUSTIC LINERS FOR GAS-TURBINE ENGINES
Авіаційно-космічна техніка та технологія, 2020 A review of current international aviation noise requirements is provided. It is shown that international requirements for aircraft noise levels are constantly increasing.
Євген Олександрович Римаренко
doaj +1 more source
Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying
Advanced Engineering Materials, EarlyView.An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara +8 more
wiley +1 more source
Investigation of the relationship between aircraft noise and community annoyance in China
Noise and Health, 2012 A survey of community annoyance induced by aircraft noise exposure was carried out around Hangzhou Xiaoshan International Airport. To investigate the relationship curves between aircraft noise and the percentage of "highly annoyed" persons in China and ...
Di Guoqing +4 more
doaj +1 more source
Proceedings, 2020 Noise annoyance due to aircraft operations extends well beyond the 55 Lden noise contours as calculated according to the Environmental Noise Directive (END).
Luc Dekoninck
doaj +1 more source
Adaptive Foam 3D Printing of Ultralight and Multifunctional Materials
Advanced Engineering Materials, EarlyView.Adaptive foam 3D printing, enabled by expandable microspheres, imparts cellular structures to thermoplastic and thermosetting polymers, manufactured through a variety of processes including fused filament fabrication, direct ink writing, digital light processing, and inkjet printing.
Nariman Rajabifar, Amir Ameli
wiley +1 more source
Aircraft Noise Assessment—From Single Components to Large Scenarios
Energies, 2018 The strategic European paper “Flightpath 2050” claims dramatic reductions of noise for aviation transport scenarios in 2050: “...The perceived noise emission of flying aircraft is reduced by 65%.
Jan Delfs +6 more
doaj +1 more source