A two-component CFD studies of the effects of H2, CNG, and diesel blend on combustion characteristics and emissions of a diesel engine

Alrazen, Hayder A.; Talib, Ahmad; Ahmad, Kamarul Arifin

doi:10.1016/j.ijhydene.2015.07.097

Cited by 44 publications

(17 citation statements)

References 45 publications

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“…Also, for modelling the combustion, a premixed combustion model was utilized. The CFD combustion simulation was conducted in terms of a 4-stroke single-cylinder direct-injection diesel engine with a bore of 80.26 mm, stroke of 88.9mm, and compression ratio of 20.36 (Alrazen et al, 2016).The syngas comprised 50% carbon monoxide and 50% hydrogen. In a syngas-diesel engine, air and syngas fuel are mixed in the intake manifold before the intake stroke.…”

Section: Methodsmentioning

confidence: 99%

Impact of Lambda Value on Combustion Characteristics and Emissions of Syngas-Diesel Dual-Fuel Engine

Mahmood¹,

Al-Sulttani²,

Mousa³

et al. 2022

IJTech

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A deep understanding of the ignition characteristics of syngas-diesel under different lambda values is essential for the application of dual-fuel combustion. In this study, the effect of increasing the lambda value was examined along with the emission characteristics and engine performance of syngas-diesel dual-fuel engines under a constant syngas-to-diesel substitution ratio of 52% at 2000 rpm engine speed. The work involved computational fluid dynamics analysis related to combustion for a four-stroke single-cylinder direct-injection engine. Combustion analysis was carried out using ANSYS Workbench (FLUENT) V16.1 software. According to the simulation results, the maximum pressure, temperature, and nitric oxide emission inside the combustion chamber increased with each increase in the value of lambda, while the emission of carbon dioxide and carbon monoxide decreased inside the engine.

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Section: Methodsmentioning

confidence: 99%

Impact of Lambda Value on Combustion Characteristics and Emissions of Syngas-Diesel Dual-Fuel Engine

Mahmood¹,

Al-Sulttani²,

Mousa³

et al. 2022

IJTech

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“…Mixers are incorporated in the fuel reticulation for combustion engines. Some works [5,[43][44][45] have intended to enhance fuel economy and decrease emissions during conversion from a diesel engine to a dual fuel engine not taking into account the enhancement of homogeneity of the mixture inside the engine and precise control of the air-fuel ratio. Recently, an innovative air-fuel mixer was developed, fabricated and assessed to be suitable for mixing air, hydrogen and CNG [46].…”

Section: Applications To Metal Casting Industries and Fuels In Combustion Enginesmentioning

confidence: 99%

Design and Fabrication of a Multi-Purpose Homogenizer

O.O¹,

O.F²,

Omoyeni³

et al. 2020

NIPES

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The homogenizer is vital equipment in numerous production sectors such as in food processing, animal feed processing, chemical and pharmaceutical industries, waste recycling and mineral and allied industries. In this work, a multi-purpose homogenizer suitable for the mixing of different materials (animal and fish feeds, coal fuel, foundry sand etc) was designed; fabricated and the performance of the machine evaluated. The cost is about #

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“…In diesel engines, the use of hydrogen under dual-fuel mode where diesel as pilot fuel and hydrogen is a hassle-free way of reducing the heterogeneity degree that results in less emissions of PM and NOx. Dual-fuel engines also enable the development of alternative fuels to attain less pollutant combustion [6,13]. One feasible approach in converting diesel engine without modifying too much, to accept hydrogen is to install the Fuel-air mixer before the combustion chamber at the air inlet.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Air-Gas Characteristics of Air-Hydrogen Mixer Designed for Dual Fuel – Engines

et al. 2021

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High smoke emissions, nitrogen oxide and particulate matter typically produced by diesel engines. Diminishing the exhausted emissions without doing any significant changes in their mechanical configuration is a challenging subject. Thus, adding hydrogen to the traditional fuel would be the best practical choice to ameliorate diesel engines performance and reduce emissions. The air hydrogen mixer is an essential part of converting the diesel engine to work under dual fuel mode (hydrogen-diesel) without any engine modification. In this study, the Air-hydrogen mixer is developed to get a homogenous mixture for hydrogen with air and a stoichiometric air-fuel ratio according to the speed of the engine. The mixer depends on the balance between the force exerted on the head surface of the valve and the opposite forces (the spring and friction forces) and its relation to decrease and increase the fuel inlet. Computational fluid dynamics (CFD) analysis software was utilised to study the hydrogen and airflow behaviour inside the mixer, established by 3.2 L engine. The Air-hydrogen mixer is examined with different speeds of engine1000, 2000, 3000 and 4000 RPM. Results showed air-hydrogen mixture was homogenous in the mixer. Furthermore, the stoichiometric air-fuel ratio was achieved according to the speed of the engine, the developed mixer of the AIR-Hydrogen mixing process provides high mixing homogeneity and engines with stoichiometric air-fuel ratios, which subsequently contributes to the high levels of efficiency in engine operation. In summary, the current study intends to reduce the emissions of gases and offer a wide range of new alternative fuels usage. While the performance of the diesel engine with the new air-hydrogen mixer needs to be tested practically.

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A two-component CFD studies of the effects of H2, CNG, and diesel blend on combustion characteristics and emissions of a diesel engine

Cited by 44 publications

References 45 publications

Impact of Lambda Value on Combustion Characteristics and Emissions of Syngas-Diesel Dual-Fuel Engine

Impact of Lambda Value on Combustion Characteristics and Emissions of Syngas-Diesel Dual-Fuel Engine

Design and Fabrication of a Multi-Purpose Homogenizer

Investigation on the Air-Gas Characteristics of Air-Hydrogen Mixer Designed for Dual Fuel – Engines

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