Results 21 to 30 of about 247 (153)

Performance assessment of low-by-pass turbofan engines for low-boom civil supersonic aircraft

Materials Research Proceedings, 2023
Abstract. This paper presents an approach to evaluate the performance of low-bypass turbofan engines without afterburner for a low-boom supersonic aircraft operating at Mach 1.5. The proposed method focuses on optimizing the propulsive performance by minimizing fuel consumption while meeting mission profile requirements.
Piccionello, F., Piccirillo, G., Viola, N.   +2 more
openaire   +2 more sources

Chemistry in plumes of high-flying aircraft with H2 combustion engines: a modelling study [PDF]

Annales Geophysicae, 1994
Recent discussions on high-speed civil transport (HSCT) systems have renewed the interest in the chemistry of supersonic-aircraft plumes. The engines of these aircraft emit large concentrations of radicals like O, H, OH, and NO.
G. Weibring, R. Zellner
doaj   +1 more source

Design of a low frequency, impulsive sound simulator in an existing house for sonic boom perceptual studies

Acta Acustica, 2023
The renewal of civil supersonic aviation is partly conditioned by the establishment of an international regulation on sonic boom level. Human perception of booms from future aircraft creating sound disturbances of lower level than past ones can currently
Cretagne Léo, Garcia A. Carlos, Leconte Roman, Ollivier François, Marchal Jacques, Marmel Frédéric, Fritz Claudia, Coulouvrat François   +7 more
doaj   +1 more source

Modern problems of aircraft aerodynamics

Advances in Aerodynamics, 2019
The article represents the discussion of several separate directions of investigations, which are performed by TsAGI flight vehicles aerodynamics specialists at the time.
Sergey L. Chernyshev, Sergey V. Lyapunov, Andrey V. Wolkov   +2 more
doaj   +1 more source

Study on minimum flight speed airworthiness standard of supersonic civil aircraft

Hangkong gongcheng jinzhan
Supersonic civil aircraft has significant changes in aerodynamic layout and design compared to subsonic civil aircraft, which will bring new risks and make some provisions of the current regulations inapplicable.
YANG Jianzhong, ZHANG Chenyang, YANG Shibin   +2 more
doaj   +1 more source

Integrated Flight Control System Characterization Approach for Civil High-Speed Vehicles in Conceptual Design

Aerospace, 2023
Recent studies have revealed that control surface deflection can cause a reduction in the aerodynamic efficiency of a hypersonic aircraft of up to 30%.
Davide Ferretto, Oscar Gori, Roberta Fusaro, Nicole Viola   +3 more
doaj   +1 more source

The jet fuels anti-wear properties indicator

Научный вестник МГТУ ГА, 2021
There are three main fuel brands for jet engines of civil aviation used: domestic TS-1 and RT and foreign, produced in relatively small volumes in Russia, JET A-1 (JET A-1).
K. I. Gryadunov, A. N. Timoshenko, K. E. Balishin, U. V. Ermolaeva   +3 more
doaj   +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

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

Digital surveillance of animals and nature recovery

People and Nature, EarlyView.
Abstract Digital surveillance technologies (DSTs) are widely applied in nature recovery for their potential to generate novel data on species and ecosystems through digital tracking, automation (e.g. from hazardous locations) and from newly recruited citizen scientists.
William M. Adams
wiley   +1 more source