Numerical Investigation of Reactivity Controlled Compression Ignition Engine Performance under Fuel Aggregation Collision to Piston Bowl Rim Edge Situation

Abstract Researchers have investigated reactivity-controlled compression ignition (RCCI) combustion in the past several years because of its excellent combustion, performance, and emission features. In this experimental study, the RCCI combustion strategy was investigated using mineral diesel/ butanol fuel-pair at various premixed ratios (rp) on an energy basis (rp= 0.25, 0.50, and 0.75) at varying engine loads (BMEP of 1, 2, 3, and 4 bar) vis-à-vis baseline compression ignition (CI) combustion (rp= 0.0) strategy. Experiments were performed at constant engine speed (1500 rpm) in a single-cylinder research engine equipped with state-of-the-art features. The outcome of the investigation showed that port injection of Butanol as low reactivity fuel (LRF) improved the combustion and yielded superior engine performance than baseline CI combustion strategy. Engine exhaust emissions exhibited significantly lower nitrogen (NOx) oxides with butanol RCCI combustion strategy than baseline CI combustion strategy. Increasing rp of Butanol showed improved combustion and emission characteristics; however, performance characteristics were not affected significantly. Particulate characteristics of the RCCI combustion strategy also showed a significant reduction in particle number concentration than baseline CI combustion. Slightly different combustion, performance, and emission characteristics of mineral diesel/ butanol fueled RCCI combustion strategy compared to other test fuels such as mineral diesel/ methanol, and mineral diesel/ ethanol-fueled RCCI combustion strategy was an interesting observation of this study. Overall, this study indicated that Butanol could be used as LRF in RCCI combustion strategy engines to achieve superior combustion and emission characteristics.

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Effect of piston bowl geometry and compression ratio on in-cylinder combustion and engine performance in a gasoline direct-injection compression ignition engine under different injection conditions

Applied Energy ◽

10.1016/j.apenergy.2020.115920 ◽

2020 ◽

Vol 280 ◽

pp. 115920

Author(s):

Leilei Xu ◽

Xue-Song Bai ◽

Yaopeng Li ◽

Mark Treacy ◽

Changle Li ◽

...

Keyword(s):

Compression Ratio ◽

Direct Injection ◽

Engine Performance ◽

Gasoline Direct Injection ◽

Compression Ignition ◽

Compression Ignition Engine ◽

Piston Bowl

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Numerical investigation on the combined effects of varying piston bowl geometries and ramp injection rate-shapes on the combustion characteristics of a kerosene-diesel fueled direct injection compression ignition engine

Energy Conversion and Management ◽

10.1016/j.enconman.2016.12.079 ◽

2017 ◽

Vol 136 ◽

pp. 1-10 ◽

Cited By ~ 13

Author(s):

Kun Lin Tay ◽

Wenming Yang ◽

Feiyang Zhao ◽

Wenbin Yu ◽

Balaji Mohan

Keyword(s):

Numerical Investigation ◽

Direct Injection ◽

Injection Rate ◽

Combustion Characteristics ◽

Combined Effects ◽

Compression Ignition ◽

Compression Ignition Engine ◽

Piston Bowl

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Effect of Injection Timing and Injection Duration of Manifold Injected Fuels in Reactivity Controlled Compression Ignition Engine Operated with Renewable Fuels

Energies ◽

10.3390/en14154621 ◽

2021 ◽

Vol 14 (15) ◽

pp. 4621

Author(s):

P. A. Harari ◽

N. R. Banapurmath ◽

V. S. Yaliwal ◽

T. M. Yunus Khan ◽

Irfan Anjum Badruddin ◽

...

Keyword(s):

Nitric Oxide ◽

Injection Timing ◽

Compression Ignition ◽

Cylinder Pressure ◽

Compression Ignition Engine ◽

Compressed Natural Gas ◽

Reactivity Controlled Compression Ignition ◽

Brake Thermal Efficiency ◽

Injection Duration ◽

Fuel Mixtures

In the current work, an effort is made to study the influence of injection timing (IT) and injection duration (ID) of manifold injected fuels (MIF) in the reactivity controlled compression ignition (RCCI) engine. Compressed natural gas (CNG) and compressed biogas (CBG) are used as the MIF along with diesel and blends of Thevetia Peruviana methyl ester (TPME) are used as the direct injected fuels (DIF). The ITs of the MIF that were studied includes 45°ATDC, 50°ATDC, and 55°ATDC. Also, present study includes impact of various IDs of the MIF such as 3, 6, and 9 ms on RCCI mode of combustion. The complete experimental work is conducted at 75% of rated power. The results show that among the different ITs studied, the D+CNG mixture exhibits higher brake thermal efficiency (BTE), about 29.32% is observed at 50° ATDC IT, which is about 1.77, 3.58, 5.56, 7.51, and 8.54% higher than D+CBG, B20+CNG, B20+CBG, B100+CNG, and B100+CBG fuel combinations. The highest BTE, about 30.25%, is found for the D+CNG fuel combination at 6 ms ID, which is about 1.69, 3.48, 5.32%, 7.24, and 9.16% higher as compared with the D+CBG, B20+CNG, B20+CBG, B100+CNG, and B100+CBG fuel combinations. At all ITs and IDs, higher emissions of nitric oxide (NOx) along with lower emissions of smoke, carbon monoxide (CO), and hydrocarbon (HC) are found for D+CNG mixture as related to other fuel mixtures. At all ITs and IDs, D+CNG gives higher In-cylinder pressure (ICP) and heat release rate (HRR) as compared with other fuel combinations.

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Influence of dispersant added nanoparticle additives with diesel-biodiesel blend on direct injection compression ignition engine: Combustion, engine performance, and exhaust emissions approach

Energy ◽

10.1016/j.energy.2021.120197 ◽

2021 ◽

Vol 224 ◽

pp. 120197 ◽

Cited By ~ 1

Author(s):

S. Jaikumar ◽

V. Srinivas ◽

M. Rajasekhar

Keyword(s):

Combustion Engine ◽

Direct Injection ◽

Engine Performance ◽

Exhaust Emissions ◽

Compression Ignition ◽

Compression Ignition Engine ◽

Engine Combustion ◽

Biodiesel Blend ◽

Nanoparticle Additives

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Analysis of Engine Performance and Combustion Characteristics of Diesel and Biodiesel blends in a Compression Ignition Engine

10.4271/2016-36-0391 ◽

2016 ◽

Cited By ~ 2

Author(s):

Henrique Dornelles ◽

Jácson Antolini ◽

Rafael Sari ◽

Macklini Dalla Nora ◽

Paulo Romeu Machado ◽

...

Keyword(s):

Engine Performance ◽

Combustion Characteristics ◽

Compression Ignition ◽

Compression Ignition Engine ◽

Biodiesel Blends

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Engine performance and emission characteristics of a compression ignition engine fuelled with diesel/dimethoxymethane blends

Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering ◽

10.1243/095440705x28367 ◽

2005 ◽

Vol 219 (7) ◽

pp. 905-914 ◽

Cited By ~ 18

Author(s):

Y Ren ◽

Z H Huang ◽

D M Jiang ◽

L X Liu ◽

K Zeng ◽

...

Keyword(s):

Thermal Efficiency ◽

Mass Fraction ◽

Volume Fraction ◽

Engine Performance ◽

Compression Ignition ◽

Compression Ignition Engine ◽

Performance And Emission ◽

Fuel Blends ◽

Performance And Emissions ◽

Combustion Phase

The performance and emissions of a compression ignition engine fuelled with diesel/dimethoxymethane (DMM) blends were studied. The results showed that the engine's thermal efficiency increased and the diesel equivalent brake specific fuel consumption (b.s.f.c.) decreased as the oxygen mass fraction (or DMM mass fraction) of the diesel/DMM blends increased. This change in the diesel/DMM blends was caused by an increased fraction of the premixed combustion phase, an oxygen enrichment, and an improvement in the diffusive combustion phase. A remarkable reduction in the exhaust CO and smoke can be achieved when operating on the diesel/DMM blend. Flat NO x/smoke and thermal efficiency/smoke curves are presented when operating on the diesel/DMM fuel blends, and a simultaneous reduction in both NO x and smoke can be realized at large DMM addition. Thermal efficiency and NO x give the highest value at 2 per cent oxygen mass fraction (or 5 per cent DMM volume fraction) for the combustion of diesel/DMM blends.

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