Results 141 to 150 of about 37,134 (315)
Advanced general aviation comparative engine/airframe integration study [PDF]
The NASA Advanced Aviation Comparative Engine/Airframe Integration Study was initiated to help determine which of four promising concepts for new general aviation engines for the 1990's should be considered for further research funding.
Ellis, D. R., Huggins, G. L.
core +1 more source
Deep Underground Science and Engineering, EarlyView.The spiral conical perforations generated during methane in situ explosion fracturing operations lead to tensile fracture propagation in shale reservoirs being governed by the combined effects of impact pressure, bedding, and aperture under explosive loading. Using multiple regression analysis and digital image correlation technology, the mechanisms of
Yabo Chai +7 more
wiley +1 more source
The Effect of Spark Timing on the Spark Ignition
Tikrit Journal of Engineering Sciences, 2013 In this work the effect of spark timing on the spark ignition engines is investigated by computer simulation and experimental test for speeds of (1500,2000,2500,3000 and 3500)rpm at spark timing of (20o,30o,40o,50o and 60o) before TDC for each speed ...
Rafeq A. Khalefa
doaj
Deep Underground Science and Engineering, EarlyView.Aluminum‐enhanced afterburning renders AE explosives more hazardous than conventional ones. Corrugated steel linings reduce far‐field AE blast overpressure by ~50% through wave reflection and dissipation. The developed model accurately predicts peak pressure (<10% error) and arrival time (<3% error), supporting protective design.
Zhen Wang +5 more
wiley +1 more source
Testing of the J-2X Augmented Spark Igniter (ASI) and Its Electronics [PDF]
Reliable operation of the spark ignition system electronics in the J2X Augmented Spark Igniter (ASI) is imperative in assuring ASI ignition and subsequent Main Combustion Chamber (MCC) ignition events are reliable in the J2X Engine.
Osborne, Robin
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ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.This paper presents a breakthrough pre‐breakdown electrochemical method for synthesizing polyNiMeOSalen suspensions, achieving an 83% yield and nanoscale dispersion ($1500/kg) and environmental impact (1.42 kg CO2eq/kg). We report a novel pre‐breakdown electrochemical synthesis method for producing polyNiMeOSalen suspensions with exceptional ...
Evgenii Beletskii +6 more
wiley +1 more source
Plasma igniter for internal combustion engine [PDF]
, 1978 An igniter for the air/fuel mixture used in the cylinders of an internal combustion engine is described. A conventional spark is used to initiate the discharge of a large amount of energy stored in a capacitor.
Breshears, R. R., Fitzgerald, D. J.
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Nanolignin Functional Separators for Flexible Lithium–Sulfur Batteries With Enhanced Performance
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.Nanolignin‐functionalized separators, incorporating lignin nanoparticles into a crosslinked PEGDA coating applied on commercial separators, reduce polysulfide shuttling, thereby enhancing cycling performance in flexible lithium–sulfur pouch cells, while also improving thermo‐oxidative stability and flame retardancy.
Emanuela Bellinetto +7 more
wiley +1 more source
Utilization of waste heat in trucks for increased fuel economy [PDF]
Improvements in fuel economy for a broad spectrum of truck engines and waste heat utilization concepts are evaluated and compared. The engines considered are the diesel, spark ignition, gas turbine, and Stirling.
Degrey, S. P. +3 more
core +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.Flame‐retardant bio‐based thermo‐flexible phase‐change composites for advanced battery thermal management. Batteries face critical challenges in thermal management, including overheating risks, poor interfacial contact, and mechanical vibration–induced performance attenuation.
Shichao Feng +7 more
wiley +1 more source