Effect of Piston Bowl Shape, Swirl Ratio and Spray Angle on Combustion and Emission in Off Road Diesel Engine

Quazi, Muzaffar Ali; singh, shakti; Jadhao, Mangeshkumar

doi:10.4271/2015-26-0142

Cited by 9 publications

(4 citation statements)

References 6 publications

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“…Furthermore, the smaller surface area resulted in reduced heat loss and consequently lower specific fuel consumption. Similar observations can be found in Quazi et al [16] and Lee et al [17], who also investigated different piston shapes. Here, too, the stepped-lip contour in particular shows relatively large advantages in the areas of soot emissions, NOx emissions and specific-fuel consumption.…”

Section: Introductionsupporting

confidence: 89%

“…Here, too, the stepped-lip contour in particular shows relatively large advantages in the areas of soot emissions, NOx emissions and specific-fuel consumption. The reasons given are consistent with [16]. Appukuttan et al [18] also demonstrated the potential for lowering BSFC and NOx emissions, provided that a narrow and deep stepped-lip-piston geometry is selected.…”

Section: Introductionsupporting

confidence: 54%

“…Therefore, this flow field during the injection is compared for one piston bowl (V5), with respect to the series geometry in Figure 5. The main idea behind the geometry V1 with the stepped lip is to have a better oxygen utilization and, therefore, increase power while decrease NOx and UHC emissions [15][16][17]. The re-entry bowl shape V2 is analyzed with the goal to further increase swirl and mixing and, therefore, reduce CO emissions [34].…”

Section: Geometry Variationmentioning

confidence: 99%

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Computational Investigation on the Performance Increase of a Small Industrial Diesel Engine Regarding the Effects of Compression Ratio, Piston Bowl Shape and Injection Strategy

et al. 2022

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This paper describes the simulative approach to calibrate an already extremely highly turbocharged industrial diesel engine for higher low-speed torque. The engine, which is already operating at its cylinder-pressure maximum, is to achieve close to 30 bar effective mean pressure through suitable calibration between the compression ratio, piston-bowl shape and injection strategy. The basic idea of the study is to lower the compression ratio for even higher injection masses and boost pressures, with the resulting disadvantages in the area of emissions and fuel consumption being partially compensated for by optimizations in the areas of piston shape and injection strategy. The simulations primarily involve the use of the 3D CFD software Converge CFD for in-cylinder calibration and a fully predictive 1D full-engine model in GT Suite. The simulations are based on a two-stage turbocharged 1950 cc four-cylinder industrial diesel engine, which is used for validation of the initial simulation. With the maximum increase in fuel mass and boost pressure, the effective mean pressure could be increased up to 28 bar, while specific consumption increased only slightly. Depending on the geometry, NOx or CO and UHC emissions could be reduced.

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Section: Introductionsupporting

confidence: 89%

Section: Introductionsupporting

confidence: 54%

Section: Geometry Variationmentioning

confidence: 99%

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Computational Investigation on the Performance Increase of a Small Industrial Diesel Engine Regarding the Effects of Compression Ratio, Piston Bowl Shape and Injection Strategy

et al. 2022

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“…Besides, the geometrical parameters of the nozzle are also directly affected by the geometric parameters of the injectors such as the diameter of the injector hole, the cone angle of the injector hole, etc. Therefore, it is necessary to have studies on the development of the spray when changing the geometrical parameters of the injectors under high-pressure conditions for design and manufacture [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Influences of injector geometry parameters on fuel injection characteristics and parameters of a diesel engine

Nguyen¹,

Lê²,

Dunin³

2023

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Internal combustion engines (ICEs), especially diesel engines, continue to play a huge role in the development of the global economy. The research trends to improve combustion is still the main research direction in recent years with the help of 3D simulation tools. In this study, a 3D-model of a four-stroke, single-cylinder diesel engine was built using AVL Fire software to evaluate the influence of injector geometry parameters on engine characteristics. The results have shown that, with the injection pressure reaching 3000 (bar), and the turbocharger pressure maintained at 0.15 (MPa), the engine achieves the maximum power and the minimum brake fuel consumption when the angle between the axis of the nozzle hole and the axis of the fuel injection nozzle is 150 degrees. However, at this angle value, the soot emission value is the lowest but the nitrogen oxides (NOx) value is close to reaching the maximum. Hydrocarbon (HC) and carbon monoxide (CO) emissions are the lowest value at 155 degrees of the angle between the axis of the spray hole and the axis of the fuel injection nozzle. Besides, the study also evaluated the engine's parameters when changing the injector hole diameter. With an injection hole diameter of 0.24 (mm), the maximum engine power increased by 5.3%, and the brake-specific fuel consumption decreased by 7.2% compared to other values of injection hole diameter. However, the engine emissions are not the best values in this case.

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A 3D-CFD methodology to investigate boundary layers and assess the applicability of wall functions in actual industrial problems: A focus on in-cylinder simulations

Berni

Fontanesi

2020

Applied Thermal Engineering

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Effect of Piston Bowl Shape, Swirl Ratio and Spray Angle on Combustion and Emission in Off Road Diesel Engine

Cited by 9 publications

References 6 publications

Computational Investigation on the Performance Increase of a Small Industrial Diesel Engine Regarding the Effects of Compression Ratio, Piston Bowl Shape and Injection Strategy

Computational Investigation on the Performance Increase of a Small Industrial Diesel Engine Regarding the Effects of Compression Ratio, Piston Bowl Shape and Injection Strategy

Influences of injector geometry parameters on fuel injection characteristics and parameters of a diesel engine

A 3D-CFD methodology to investigate boundary layers and assess the applicability of wall functions in actual industrial problems: A focus on in-cylinder simulations

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