Numerical analysis of the hydrogen-air mixture formation process in a direct-injection engine for off-road applications

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 77, P. 1286 - 1295

Published: June 22, 2024

Language: Английский

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Numerical investigation of in-cylinder gas motion dynamics in a heavy-duty direct injection hydrogen internal combustion engine

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 86, P. 730 - 741

Published: Sept. 1, 2024

Language: Английский

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Exposure The Role Of Hydrogen With Algae Spirogyra Biodiesel And Fuel-Borne Additive On A Diesel Engine: An Experimental Assessment On Dual Fuel Combustion Mode

Case Studies in Thermal Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 105566 - 105566

Published: Nov. 1, 2024

Language: Английский

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The Effect of Injection Strategy on the Mixture Formation and Combustion in a Direct Injection Hydrogen Engine

International Journal of Automotive Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 24, 2024

Language: Английский

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Numerical Evaluation of Fuel-Air Mixing in a Direct-Injection Hydrogen Engine Using a Multi-Hole Injector

SAE technical papers on CD-ROM/SAE technical paper series, Journal Year: 2024, Volume and Issue: 1

Published: Nov. 5, 2024

<div class="section abstract"><div class="htmlview paragraph">Hydrogen as a chemical energy carrier is considered one of the most promising options to achieve effective decarbonization transportation sector, due its carbon-free composition. This particularly true for applications that rely on internal combustion engines (ICEs), although much research still needed stable, reliable, and safe operations engine. To this purpose, direct injection (DI) gaseous hydrogen during compression stroke offers great potential avoid backfire largely reduce preignition issues, opposed port-fuel injection. Recently, has been dedicated, both experimentally numerically, understanding physics chemistry connected with hydrogen’s mixing processes in ICEs. work presents computational fluid dynamics (CFD) study DI process an optical engine operating at relatively low tumble conditions. Gaseous pressurized 86 bar introduced directly into chamber via centrally mounted 13-hole injector. Numerical simulations are carried out CONVERGE software. The turbulent flow exchange in-cylinder charge motion modeled unsteady Reynolds-averaged Navier-Stokes formulation closed by renormalization group <i>k-ε</i> model. Several configurations mesh investigated evaluate role prediction jet’s early development resulting cylinder mixture distribution. In sections follow, evaluation effect injector geometry features start timing evolution fuel-air presented. numerical results systematically compared against experimental planar laser-induced fluorescence data from literature assess performance CFD model establish best practices modeling high-pressure using multi-hole injectors ICEs.</div></div>

Language: Английский

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Investigation of thermodynamic process in a humidifier of humidification–dehumidification system based on a computational fluid dynamics model

Case Studies in Thermal Engineering, Journal Year: 2024, Volume and Issue: 60, P. 104690 - 104690

Published: June 17, 2024

Humidification–dehumidification is well-suited for solar-powered operation. Packed bed humidifier an essential system component water evaporation. Computational fluid dynamics (CFD) simulation of the packed a challenging multiscale task. The simultaneous capture micro flow properties and macro transfer performance by existing CFD models inadequate. This paper presents novel model structured humidifier. Eulerian method applied to multiphase several simplified are proposed evaluate influence microstructure on properties. can predict overall partially reflect characteristics. It found that air temperature increases rapidly when packing height < 0.3 m, while liquid decreases > 1.65 m or <0.45 m. Under different conditions, outlet relative humidity all between 95 % 99 %. maximum evaluation error gained output ratio humidification–dehumidification reach 10 under saturated assumption. With 10.85 minimum 3.46 %, proportion sensible heat in total energy with height.

Language: Английский

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A mathematical modeling of the turbulence combustion biodiesel in a compression ignition engine

Silniki Spalinowe/Combustion Engines, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 7, 2024

The present work proposes a new model for biodiesel combustion in an internal engine. This first includes the balance equations of gas dynamics with heat release. Secondly, special properties that take into account turbulence effects is incorporated. chemical models implemented this study are biofuel used at less than 100% and biodiesel-diesel blends. resulting coupling describing premixing. obtained interesting applicable to wide range problems without major modifications. It then proposed scientific community order develop engines capable meeting future political expectations regarding reduction pollutant emissions from engines.

Language: Английский

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An optical investigation on arc shortening features and its impacts on ignition process with multiple discharging system

Case Studies in Thermal Engineering, Journal Year: 2024, Volume and Issue: 60, P. 104713 - 104713

Published: June 18, 2024

Flame kernel generation is essential to the stability and efficiency of combustion in a spark engine. In this study, initial process flame was studied an optical The engine operated with λ adjusted from 1.0 1.5, respectively. Meanwhile, continuous arc motion inventively quantified. First, impact single-coil multi-coil discharge on knocking tendency are examined. Secondly, differences development between effect shortening phenomenon kernels compared by images. Finally, feathers (including timing, extent, spatial location) statistically analyzed over multiple cycles conjunction phase. results show that can make larger, which could keep quenching. They also variations linked cycle-to-cycle fluctuations. Furthermore, principal component analysis done features first two shortenings CA05 phases. Precision control greatly enhance engine's lower

Language: Английский

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Analysis of Energy Efficiency Parameters of a Hybrid Vehicle Powered by Fuel with a Liquid Catalyst

Energies, Journal Year: 2024, Volume and Issue: 17(20), P. 5138 - 5138

Published: Oct. 16, 2024

A notable trend in the modern automotive market is increased interest hybrid cars. Hybrid cars combine a standard internal combustion engine with an electric motor solution. Research into increasing energy efficiency of conventional unit while meeting increasingly stringent exhaust emission standards becoming key postulate this matter. This article discusses analysis modifying fuel used by vehicles using example selected drive equipped spark-ignition engine. effect was tested after Eco Fuel Shot liquid catalyst added to fuel. The research process carried out two stages, as follows: road conditions Dynomet dynamometer; and on V-tech VT4/B2 chassis dynamometer. Tests were replicate tests catalytic additive mathematical model created following parameters vehicle calculated: torque engine, motor, generator; rotational speeds power equivalent consumption mileage generator. results made it possible identify benefits operation system analyzed vehicle. will be benefit both demand side form users category vehicles, supply represented manufacturers units.

Language: Английский

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Experimental Characterization of High-pressure Hydrogen Jet Mixing and Combustion

Applied Thermal Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 125276 - 125276

Published: Dec. 1, 2024

Language: Английский

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