Results 81 to 90 of about 55,053 (305)

Ultrafast Transitions in X‐Ray Irradiated Solids

open access: yesContributions to Plasma Physics, EarlyView.
ABSTRACT In this review, we present current developments on modeling ultrafast transitions in solids triggered by intense, atto‐ to femtosecond pulses from X‐ray free electron lasers. This specific irradiation regime requires dedicated simulation tools based on theoretical and computational methods, involving the elements of classical and quantum ...
Sebastião Antunes   +3 more
wiley   +1 more source

Chemical Kinetic Model of Multicomponent Gasoline Surrogate Fuel with Nitric Oxide in HCCI Combustion

open access: yesMolecules, 2020
This study presents a simplified mechanism of a five-component gasoline surrogate fuel (TDRF–NO) that includes n-heptane, isooctane, toluene, diisobutylene (DIB) and nitric oxide (NO).
Chao Yang, Zhaolei Zheng
doaj   +1 more source

Ignition and combustion of lunar propellants [PDF]

open access: yes
The ignition and combustion of Al, Mg, and Al/Mg alloy particles in 99 percent O2/1 percent N2 mixtures is investigated at high temperatures and pressures for rocket engine applications.
Burton, Rodney L.   +2 more
core   +1 more source

The effect of the ignition dwell time at constant speed for CNGDI engine [PDF]

open access: yes, 2010
The different of combustion characteristics of natural gas, gasoline and diesel in direct injection internal combustion engine requires different combinations of engine parameters to optimize the engine performance.
Aris, Ishak, Hassan, Mohd Khair
core  

Teacher agency in curriculum and pedagogical development: Reflections from a design research project about self‐regulated learning in secondary schools

open access: yesThe Curriculum Journal, EarlyView.
Abstract Transnational guidelines on skills and competencies for lifelong learning, along with curriculum reforms to promote curriculum flexibility and autonomy in schools, are pressing teachers to be engaged in curriculum and pedagogical innovation focused on student‐centred approaches favourable to developing learner autonomy.
Thiago Freires   +3 more
wiley   +1 more source

Effect of temperature on the impact ignition behavior of the aluminum/polytetrafluoroethylene reactive material under multiple pulse loading

open access: yesMaterials & Design, 2020
An impact ignition experiment was conducted using a split Hopkinson pressure bar at 22, 65, 125, and 205 °C to study the ignition behavior of an aluminum/polytetrafluoroethylene reactive material under extreme conditions such as high temperature ...
Huilan Ren, Wei Li, Jianguo Ning
doaj   +1 more source

Shock wave propagation characteristics of aluminum‐containing explosive in corrugated steel‐lined tunnel

open access: yesDeep 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

A Chemical Kinetic Mechanism for the Ignition of Silane/Hydrogen Mixtures [PDF]

open access: yes
A chemical kinetic reaction mechanism for the oxidation of silane/hydrogen mixtures is presented and discussed. Shock-tube ignition delay time data were used to evaluate and refine the mechanism.
Jachimowski, C. J., Mclain, A. G.
core   +1 more source

Nanolignin Functional Separators for Flexible Lithium–Sulfur Batteries With Enhanced Performance

open access: yesENERGY &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

Flame morphology and laminar flame assessments affected by flames interaction using multi-ignition sources of NH3/H2-air flames

open access: yesApplications in Energy and Combustion Science
A detailed assessment of flame–flame interaction and laminar flame evolution using multi-ignition sources is experimentally studied. To understand the flame interaction, the centrally ignited flame is measured and calculated for comparison with multi ...
Ahmed Yasiry   +7 more
doaj   +1 more source

Home - About - Disclaimer - Privacy