Investigation of swirl induced piston on the engine characteristics of a biodiesel fueled diesel engine

Prabhakaran, Prasanth; Saravanan, C.G.; Vallinayagam, R.; Vikneswaran, M.; Muthukumaran, N.; Ashok, K.

doi:10.1016/j.fuel.2020.118503

Cited by 23 publications

(7 citation statements)

References 24 publications

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“…The cylinder pressure was recorded over 200 successive engine cycles. The pressure measurements over 200 cycles were averaged, and then, using the first law of thermodynamics, the program automatically estimated the rate of heat emission based on the mean pressure data [18]. Finally, the exhaust products HC (ppm), CO (% vol), NO (ppm), and smoke opacity (%) were measured for all the test fuels at each operating condition.…”

Section: Engine Setup and Its Operating Proceduresmentioning

confidence: 99%

Study on the engine characteristics (CI) of using pumpkin-maize-blended biodiesel mixed with additive (diethyl ether)

Magesh,

Pushparaj,

Sabanayagam

2024

Bull. Chem. Soc. Eth.

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This paper focused on the engine characteristics of a diesel engine fuelled using ternary blends. Initially, pumpkin and maize biodiesel were mixed in a volume ratio of 50:50. With a constant 0.5% diethyl ether (DEE) content, the binary combination of pumpkin and maize biodiesel was mixed with diesel at proportions of 10:90, 20:80, 30:70, 40:60, and 50:50 by volume. The prepared ternary mixtures were evaluated at varying engine loads to improve engine performance. Compared to diesel, the tested ternary blends had a reduced brake thermal efficiency (BTE). However, up to a 30% blending ratio, the BTE demonstrated by ternary blends was within the range of less than 0.5% concerning diesel fuel. The ternary blends' BSFC declined as the binary biodiesel mix increased. Diesel has a brake specific fuel consumption (BSFC) of 1.4%, 2.2%, and 3.4% lower than the ternary blends of 10%, 20%, and 30%. The decrease in the heat release rate of the ternary mixes meant that emitted less CO and NOx than diesel. In contrast, ternary blends exhibited an increasing trend in smoke and HC emissions because of the rise in incomplete combustion that occurs as biodiesel content rises. Therefore, with appropriate engine modifications, the pumpkin and maize binary biodiesel blend can replace diesel by up to 30%. KEY WORDS: Biodiesels, Binary blend, DEE, Ternary blend, Efficiency Bull. Chem. Soc. Ethiop. 2024, 38(4), 1145-1161. DOI: https://dx.doi.org/10.4314/bcse.v38i4.26

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Section: Engine Setup and Its Operating Proceduresmentioning

confidence: 99%

Study on the engine characteristics (CI) of using pumpkin-maize-blended biodiesel mixed with additive (diethyl ether)

Magesh,

Pushparaj,

Sabanayagam

2024

Bull. Chem. Soc. Eth.

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“…This was due to the better air-fuel mixing inside the chambers. The modified chambers trapped the fuel near the cylinder axis, leading to early combustion [37].…”

Section: Analysis Of Heat Release Rate For Modified Combustion Chambersmentioning

confidence: 99%

“…chambers. The modified chambers trapped the fuel near the cylinder axis, leading to early combustion [37]. The cumulative heat release rate (CHHR) plays a vital role in expressing combustion efficiency.…”

Section: Analysis Of Heat Release Rate For Modified Combustion Chambersmentioning

confidence: 99%

Advanced Numerical Analysis of In-Cylinder Combustion and NOx Formation Using Different Chamber Geometries

Doppalapudi,

Azad

2024

Fire

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In diesel engines, emission formation inside the combustion chamber is a complex phenomenon. The combustion events inside the chamber occur in microseconds, affecting the overall engine performance and emissions characteristics. This study opted for using computational fluid dynamics (CFD) to investigate the combustion patterns and how these events affect nitrogen oxide (NOx) emissions. In this study, a diesel engine model with a flat combustion chamber (FCC) was developed for the simulation. The simulation result of the heat release rate (HRR) and cylinder pressure was validated with the experimental test data (the engine test was conducted at 1500 rpm at full load conditions). The validated model and its respective boundary conditions were used to investigate the effect of modified combustion chamber profiles on NOx emissions. Modified chambers, such as a bathtub combustion chamber (BTCC) and a shallow depth chamber (SCC), were developed, and their combustion events were analysed with respect to the FCC. This study revealed that combustion events such as fuel distribution, unburnt mass fractions, temperature and turbulent zones directly impact NOx emissions. The modified chambers controlled the spread of combustion and provided better fuel distribution, improving engine performance and combustion rates. The SCC (63.2 bar) showed peak pressure rates compared to the FCC (63.02 bar) and BTCC (62.72 bar). This study concluded that the SCC showed better results than other chambers. This study further recommends conducting lean fuel mixture combustion with chamber modifications and optimising fuel spray, such as by adjusting the fuel injection profile, spray angle and injection timing, which has a better tendency to create complete combustion.

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“…The essential factor needed to achieve diesel HCCI combustion is the mixture control, including charge components, temperature control throughout the combustion process, and high pre-ignition mixing rates [14]. The impact of piston bowl geometry on an engine's flow, turbulence, mixing, and combustion has been extensively ascertained in the literature [16][17][18][19][20][21][22][23]. Improvements in fuel-air mixing within the cylinder have the potential to greatly improve combustion, thereby increasing engine performance [24].…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics (CFD) Validation and Investigation the Effect of Piston Bowl Geometries Performance on Port Fuel Injection-Homogeneous Charge Compression Ignition (PFI-HCCI) Engines

Nik Muhammad Hafiz Nik Ab Rashid,

Abdul Aziz Hairuddin,

Khairil Anas Md Rezali

et al. 2024

ARNHT

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Homogeneous charge compression ignition (HCCI) is an advanced combustion strategy proposed to provide higher efficiency and lower emissions than conventional compression ignition. Nevertheless, the operation of HCCI engines still presents formidable challenges. Preparing homogeneous mixtures and controlling the combustion phase are crucial challenges in the context of engine performance. Piston bowl geometry significantly enhances the process by improving the flow and facilitating air-fuel mixing for combustion. On that note, this study utilised the CFD simulation methods to analyse HCCI combustion in port fuel injection (PFI) mode and evaluate the effect of piston bowl geometries on engine performance. For this purpose, the CFD simulation result for a single-cylinder, four-stroke YANMAR diesel engine was validated with experimental data. The different piston bowl geometries with the same volume, compression, and equivalence ratio were then investigated numerically. The validation result of the CFD simulation offers enough confidence to continue the study with different piston bowl geometries. The results attained from the Direct Injection (DI) engine piston bowl application demonstrate a minor change in in-cylinder pressure and heat release rate. The piston bowl design employed in a Port Fuel Injection engine application exhibited different combustion phases while demonstrating similarity in attaining in-cylinder pressure. The findings for swirl induce piston bowl design indicate an enhancement of in-cylinder pressure for the Spiral Crown geometry model, reaching 9.42 MPa. The results of the study demonstrated that the piston bowl's design affected the performance of an HCCI engine.

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Investigation of swirl induced piston on the engine characteristics of a biodiesel fueled diesel engine

Cited by 23 publications

References 24 publications

Study on the engine characteristics (CI) of using pumpkin-maize-blended biodiesel mixed with additive (diethyl ether)

Study on the engine characteristics (CI) of using pumpkin-maize-blended biodiesel mixed with additive (diethyl ether)

Advanced Numerical Analysis of In-Cylinder Combustion and NOx Formation Using Different Chamber Geometries

Computational Fluid Dynamics (CFD) Validation and Investigation the Effect of Piston Bowl Geometries Performance on Port Fuel Injection-Homogeneous Charge Compression Ignition (PFI-HCCI) Engines

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