Results 61 to 70 of about 179,421 (367)

Environmental Impact Assessment, on the Operation of Conventional and More Electric Large Commercial Aircraft [PDF]

open access: yes, 2013
Global aviation is growing exponentially and there is a great emphasis on trajectory optimization to reduce the overall environmental impact caused by aircraft. Many optimization techniques exist and are being studied for this purpose.
Lawson, Craig P.   +2 more
core   +1 more source

Re‐Entrant Super‐Repellent Metallic Structures for Robust Anti‐Icing

open access: yesAdvanced Science, EarlyView.
Breakthrough re‐entrant super‐repellent structures engineered on metals demonstrate unprecedented anti‐icing performances: >600 min icing delay, 1.6 kPa ultralow ice adhesion strength, and 100‐cycle deicing durability. Thermodynamic analysis elucidates novel anti‐icing mechanisms and underlying design principles for exceptional ice‐resistance under ...
Daizhou Li   +8 more
wiley   +1 more source

Aircraft Engine Crankshaft Optimisation

open access: yesJournal of Middle European Construction and Design of Cars, 2014
Shrnutí Tento článek popisuje část návrhového procesu klikové hřídele vznětového dvoudobého motoru s protiběžnými písty, při níž je pro zadané průměry a délky čepů hledán optimální tvar ramen hřídele. Je zde popsán postup vzniku několika variant, které jsou následně podrobeny kritickému zhodnocení, a dále mechanismus výběru výsledného nejlepšího ...
Lubomír Drápal   +2 more
openaire   +2 more sources

Performance improvements of a highly integrated digital electronic control system for an F-15 airplane [PDF]

open access: yes
The NASA highly integrated digital electronic control (HIDEC) program is structured to conduct flight research into the benefits of integrating an aircraft flight control system with the engine control system.
Andries, M. G.   +3 more
core   +1 more source

A Degradable Bioinspired Flier with Aerogel‐Based Colorimetric Sensors for Environmental Monitoring

open access: yesAdvanced Science, EarlyView.
Biodegradable fliers are developed inspired by Tipuana tipu samaras, integrating cellulose nanocrystal aerogel (CNCa) sensors loaded with natural dyes for pH and ammonia detection. The lightweight, degradable fliers mimic natural morphology and aerodynamics, offering an eco‐friendly, scalable solution for in situ environmental monitoring after passive ...
Gianpaolo Gallo   +4 more
wiley   +1 more source

Study of small turbofan engines applicable to general-aviation aircraft [PDF]

open access: yes
The applicability of small turbofan engines to general aviation aircraft is discussed. The engine and engine/airplane performance, weight, size, and cost interrelationships are examined. The effects of specific engine noise constraints are evaluated. The
Alsworth, C. C.   +2 more
core   +1 more source

Unveiling the Corrosion Mechanisms of High‐Entropy RETaO4 Through In Situ Observation

open access: yesAdvanced Science, EarlyView.
Composition‐property relationships in multi‐component RETaO4 are unveiled. In situ XRD/TEM and EBSD expose dynamic crystallization pathways of the dominant corrosion product (pyrochlore) and reaction‐diffusion corrosion mechanisms. La1/6Nd1/6Sm1/6Eu1/6Gd1/6Dy1/6TaO4 emerges as the optimal composition, combining minimal corrosion layer thickness with ...
Zeyu Chen   +7 more
wiley   +1 more source

Modeling of the Diffusion Bond for SPF/DB Titanium Hollow Structures

open access: yesInternational Journal of Aerospace Engineering, 2015
Diffusion-bonded titanium hollow warren structures have been successfully applied in aircraft engine components, such as fan blade, and OGV, while the optimal design of the hollow warren structure to improve its impact resistance, especially under bird ...
Xianghai Chai   +3 more
doaj   +1 more source

Approximate dynamic model of a turbojet engine [PDF]

open access: yes
An approximate dynamic nonlinear model of a turbojet engine is elaborated on as a tool in studying the aircraft control loop, with the turbojet engine treated as an actuating component.
Artemov, O. A.
core   +1 more source

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