Results 71 to 80 of about 14,848 (204)

Recent studies on flame stabilization of premixed turbulent gases [PDF]

, 1957
FLAME stabilization is of importance in the practical design of ramjets and afterburners. It has been studied extensively in recent years, particularly with reference to bluff-body flame-holders.
Penner, S. S., Williams, F.
core  

The starting transient of solid propellant rocket motors with high internal gas velocities [PDF]

A comprehensive analytical model which considers time and space development of the flow field in solid propellant rocket motors with high volumetric loading density is described.
Caveny, L. H., Kuo, K. K., Peretz, A., Summerfield, M.   +3 more
core   +1 more source

The Influence of Helium Addition on the Combustion Process in a Hydrogen-Fueled Turbulent Jet Ignition Engine

Applied Sciences
There are considerably fewer requirements for the quality of hydrogen combusted in an engine than its quality for fuel cells. Therefore, the analysis was carried out on the combustion of hydrogen–helium mixtures in an engine with a two-stage combustion ...
Dawid Mielcarzewicz, Ireneusz Pielecha
doaj   +1 more source

The use of AntiMisting Kerosene (AMK) in turbojet engines [PDF]

, 1981
The effect of antimisting kerosene (AMK) flow characteristics on fan jet engines and the impact of degradation requirements on the fuel system was evaluated.
Schmidt, H. W.
core   +1 more source

Consistent Conditional Moment Closure Modelling of a Lifted Turbulent Jet Flame Using the Presumed β-PDF Approach

Journal of Combustion, 2014
A lifted H2/N2 turbulent jet flame issuing into a vitiated coflow is investigated using the conditional moment closure. The conditional velocity (CV) and the conditional scalar dissipation rate (CSDR) submodels are chosen such that they are fully ...
Ahmad El Sayed, Roydon A. Fraser
doaj   +1 more source

CFD Simulation of Pre-Chamber Spark-Ignition Engines—A Perspective Review

Energies
The growing demand to reduce emissions of pollutants and CO2 from internal combustion engines has led to a critical need for the development of ultra-lean burn engines that can maintain combustion stability while mitigating the risk of knock.
Soo-Jin Jeong
doaj   +1 more source

Microgravity combustion science: Progress, plans, and opportunities [PDF]

An earlier overview is updated which introduced the promise of microgravity combustion research and provided a brief survey of results and then current research participants, the available set of reduced gravity facilities, and plans for experimental ...

core   +1 more source

Influence of In-Cylinder Turbulence Kinetic Energy on the Mixing Uniformity within Gaseous-Fuel Engines under Various Intake Pressure Conditions

Energies
To explore the potential for further enhancing the gas mixing uniformity of natural gas (NG) engines, this paper identifies turbulent kinetic energy (TKE), which has an essential impact on gas mixing, as the entry point of the research.
Tianbo Wang, Yu Wang, Lanchun Zhang, Yan Zheng, Ranran Liu, Chengmin Wang, Wu Gong   +6 more
doaj   +1 more source

A randomization and unrolling framework to improve deep neural networks modelling chemistry integration across multiple combustion regimes

Applications in Energy and Combustion Science
Solving finite-rate chemical kinetics through direct integration is computationally expensive and often becomes a performance bottleneck in high-fidelity combustion simulations.
Weitao Liu, Andreas Kronenburg, Thorsten Zirwes   +2 more
doaj   +1 more source

Effect of key structure parameters of passive pre-chamber on in-cylinder combustion processes and emissions within a gasoline engine

Case Studies in Thermal Engineering
Due to increasingly strict global emission regulations and energy conservation policies, gasoline engines are facing significant challenges. Achieving high efficiency and ultra-low emissions in gasoline engines has become a critical technical challenge ...
Yang Lv, Shangsi Feng, Jing Luo, Qiuyu Liu, Lan Li, Zhe Kang   +5 more
doaj   +1 more source