Results 41 to 50 of about 457,397 (165)

Aerodatabase Development and Integration and Mission Analysis of a Mach 2 Supersonic Civil Aircraft

Aerospace
The request for faster and greener civil aviation is urging the worldwide scientific community and aerospace industry to develop a new generation of supersonic aircraft, which are expected to be environmentally sustainable and to guarantee a high-level ...
P. Roncioni, Marco Marini, O. Gori, Roberta Fusaro, Nicole Viola   +4 more
semanticscholar   +1 more source

Impact of a Thermally Stratified Energy Source Located in Front of a Pointed Cylinder Aerodynamic Model on the Pressure Signatures and PLdB Effect on the Ground

Applied Sciences, 2023
The problem of noise reduction in supersonic aircraft design is one of the key problems, the solution of which largely determines the speed of development of supersonic aviation as a whole.
O. V. Kravchenko, O. A. Azarova, D. D. Knight   +2 more
doaj   +1 more source

Ultrasonic Rainbow: A Meta‐Transducer for Frequency‐Selective Elastic Wave Control via Dithering‐Based Wavenumber Tuning

Advanced Intelligent Systems, EarlyView.
A piezoelectric meta‐transducer generates an ultrasonic rainbow, steering guided elastic waves to different angles according to frequency. A dithering‐based binary electrode design enables a closer realization of the target wavenumber filter, improving directional purity and suppressing unwanted lobes. Numerical and experimental validation demonstrates
Masoud Mohammadgholiha, Jochen Moll, Kilian Tschöke, Carsten Kruska, Sylvia E. Gebhardt, Luca De Marchi   +5 more
wiley   +1 more source

Multidisciplinary Design Optimization for the Conceptual Design of Supersonic Civil Aircraft Based on Full-Carpet Sonic Boom/Aerodynamic Characteristics Employing Differential Evolution

Aerospace
Reducing the sonic boom intensity and increasing the cruise lift-to-drag ratio are pivotal technologies for the successful development of supersonic civil aircraft.
Yuyu Duan, Chonweng Wan, Runze Li, Haixin Chen   +3 more
doaj   +1 more source

Aircraft pollution – a futuristic view [PDF]

Atmospheric Chemistry and Physics, 2007
Impacts of NOx, H2O and aerosol emissions from a projected 2050 aircraft fleet are investigated using the Oslo CTM2, with emissions provided through the EU project SCENIC.
C. Marizy, G. Pitari, I. S. A. Isaksen, M. Gauss, O. A. Søvde   +4 more
doaj  

S.C. Advanced Training Aircraft IAR 99 (A) SOIM [PDF]

INCAS Bulletin, 2012
The use of subsonic single control aircraft and especially of double–control ones, instead of supersonic combat aircraft in the military pilot training programs in the operational units, has be-come a necessity due to the economic and financial world ...
Ioan STEFANESCU
doaj   +1 more source

Enhancing hydrogen evolution reaction by harnessing bubble dynamics regulation: Principles, methods, and outlook

Droplet, EarlyView.
Bubble dynamics pose critical bottlenecks to hydrogen evolution reaction efficiency, causing active site isolation, increased ohmic resistance, and concentration overpotential, especially at high current densities. This review comprehensively summarizes passive and active bubble manipulation strategies, elucidates their underlying principles, and ...
Ziwei Guo, Chunhui Zhang, Yunxun Liu, Yi Han, Jinghang Pan, Lingyao Zhang, Chuanqi Nie, Yuejing Zhao, Kesong Liu, Cunming Yu, Lei Jiang   +10 more
wiley   +1 more source

Utilization of simple and double control subsonic aircraft for advanced combat training of the military pilots [PDF]

INCAS Bulletin, 2012
The use of subsonic single control aircraft and especially of double–control ones, instead of supersonic combat aircraft in the military pilot training programs in the operational units, has be-come a necessity due to the economic and financial world ...
Ioan STEFANESCU
doaj   +1 more source

Aerodynamic Optimization Design of Supersonic Wing Based on Discrete Adjoint

Aerospace, 2023
Reducing fuel consumption and improving the economy by effectively reducing cruising drag is the main objective of the aerodynamic design of supersonic civil aircraft.
Hanyue Rao, Yayun Shi, Junqiang Bai, Yifu Chen, Tihao Yang, Junfu Li   +5 more
doaj   +1 more source

Fish Scales: A Multifunctional Biomaterial from Nature

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Fish scales demonstrate nature's solution to impact protection through overlapping multilayered architecture. This biological design combines mineralized surfaces with collagen networks to achieve both flexibility and fracture resistance. The structural principles inspire advanced protective materials and biomedical implants, where damage tolerance ...
Liyao Dong, Xiaojie Sun, Xiguang Chen
wiley   +1 more source