Results 81 to 90 of about 1,247,418 (410)

Lightweight, low compression aircraft diesel engine [PDF]

open access: yes
The feasibility of converting a spark ignition aircraft engine to the diesel cycle was investigated. Procedures necessary for converting a single cylinder GTS10-520 are described as well as a single cylinder diesel engine test program.
Bachle, C. F.   +3 more
core   +1 more source

Unique Aerofoil‐Structured Microfluidics for High Throughput Lipid Nanoparticle Formulation Screening and Scale‐up

open access: yesAdvanced Science, EarlyView.
This study presents aerofoiled microfluidic structures optimized for efficient mixing and lipid nanoparticle (LNP) formation across broad flow rates. Based on this design, two dedicated systems are introduced: MiNANO‐form for high‐throughput formulation screening and MiNANO‐scale for continuous large‐scale production, enabling reproducible, high ...
Dongsheng Liu   +8 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

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

Damage‐Free Full‐Thickness Dicing of Ultra‐Thin GaAs Wafers Using a Femtosecond Laser with Low Residual Stress

open access: yesAdvanced Science, EarlyView.
This study presents a femtosecond laser‐based ultrashort pulse dicing system that uses a non‐diffracting Bessel beam to shape the femtosecond laser. The use of femtosecond Bessel beam shaping and high‐speed scanning enables rapid material removal that outpaces thermal diffusion, thereby suppressing melting, minimizing the HAZ, and reducing sidewall ...
Shunshuo Cai   +12 more
wiley   +1 more source

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

All‐In‐One Thermal Protection: Multifunctional Synergy in Hierarchically Structured Dual‐Oxide Nanofiber Aerogel

open access: yesAdvanced Science, EarlyView.
Through a cross‐scale structural design, a lightweight, heat‐resistant, and thermal‐insulating streamlined dual‐oxide nanofiber aerogel is prepared to achieve exceptional thermomechanical stability. Structural design of ceramic fibrous aerogel toward thermal protection, illustrating thermal insulation and stress dissipation.
Zijian Zhao   +9 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

Design and test of aircraft engine isolators for reduced interior noise [PDF]

open access: yes
Improved engine vibration isolation was proposed to be the most weight and cost efficient retrofit structure-borne noise control measure for single engine general aviation aircraft.
Scheidt, D. C., Unruh, J. F.
core   +1 more source

Superelastic High‐Entropy Oxide Ceramic Aerogels for Thermal Superinsulation and Sealing at Extreme Conditions

open access: yesAdvanced Science, EarlyView.
A high‐entropy oxide ceramic of (Gd1/2Lu1/2)2(Ti1/3Zr1/3Hf1/3)2O7 is prepared through a molecular synthesis route of pyrolytic solid‐solution reactions. The architectured nanofiber aerogel manifests unprecedented thermomechanical properties, including superelastic compressibility of 98% from −196 to 1500 °C, and thermal superinsulation capacity (24.14 ...
Xiaoke Jiang   +9 more
wiley   +1 more source

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