Computational Study of the Effects of the Re-entrant Lip Shape and Toroidal Radii of Piston Bowl on a HSDI Diesel Engine's Performance and Emissions

A computational study on performance and exhaust emissions from a 4-stroke DI CI engine using different air induction methods was carried out. Using AVL Boost IC engine simulation software a model was developed with a Naturally Aspirated (NA) air induction mode, the second model was developed by incorporating a turbocharger (TC) and again a third model was developed by the introduction of a turbocharger along with an intercooler (TCI). The individual effects of all the three air induction methods on the performance and emission of engine were studied and compared. The power output for the engine with TCI was observed to be 7.8% more than that of an engine with TC, where as it was even greater i-e 20% more when compared with NA engine. Similar Improved results for torque were also observed in case of an engine with TCI. It was also observed that emissions were higher with TCI followed with TC and NA.

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Effect of Piston Bowl Geometry on Performance and Emissions with Mahua Biodiesel Blend

10.4271/2018-28-0057 ◽

2018 ◽

Cited By ~ 1

Author(s):

Jyothi U S ◽

Vijaya Kumar Reddy K

Keyword(s):

Piston Bowl ◽

Performance And Emissions ◽

Biodiesel Blend ◽

Mahua Biodiesel

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An Investigation of the Effects of the Piston Bowl Geometries of a Heavy-Duty Engine on Performance and Emissions Using Direct Dual Fuel Stratification Strategy, and Proposing Two New Piston Profiles

SAE International Journal of Engines ◽

10.4271/03-13-03-0021 ◽

2020 ◽

Vol 13 (3) ◽

Cited By ~ 3

Author(s):

Sasan Shirvani ◽

Saeid Shirvani ◽

Amir H. Shamekhi ◽

Rolf D. Reitz

Keyword(s):

Dual Fuel ◽

Heavy Duty ◽

Piston Bowl ◽

Fuel Stratification ◽

Performance And Emissions

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Influence of combustion chamber geometry on performance and emissions of diesel engine Vikyno RV125-2

Science and Technology Development Journal ◽

10.32508/stdj.v18i1.946 ◽

2015 ◽

Vol 18 (1) ◽

pp. 102-111

Author(s):

Khai Le Duy Nguyen ◽

Hung Dac Khanh Nguyen

Keyword(s):

Diesel Engine ◽

Combustion Chamber ◽

Compression Ratio ◽

Direct Injection ◽

Soot Concentration ◽

Research Results ◽

Direct Injection Diesel Engine ◽

Piston Bowl ◽

Performance And Emissions ◽

Engine Power

This paper presents a research on the influence of combustion chamber geometry on performance and emissions of direct injection diesel engine VIKYNO RV125-2 using threedimensional CFD code KIVA-3V. In this study, the piston bowl depth (pip-height), bottom bowl diameter and bowl diameter are changed while the engine compression ratio is still kept. Research results indicate that increased bowl diameter works best. Specifically, when the bowl diameter changes from 3.98cm to 4.7cm, the engine power is increased 22.6%, while the concentration of NOx is reduced 0.85%. However soot concentration will increase 45.83%.

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Numerical Simulation of a Naturally Aspirated Natural Gas/Diesel RCCI Engine for Investigating the Effects of Injection Timing on the Combustion and Emissions

Journal of Energy Resources Technology ◽

10.1115/1.4046470 ◽

2020 ◽

Vol 142 (7) ◽

Author(s):

Amir Hossein Fakhari ◽

Rouzbeh Shafaghat ◽

Omid Jahanian

Keyword(s):

Natural Gas ◽

Fuel Mixture ◽

Injection Timing ◽

Reactivity Controlled Compression Ignition ◽

Piston Bowl ◽

Start Of Injection ◽

Performance And Emissions ◽

The Difference ◽

The Impact ◽

Co Emission

Abstract The start of injection (SOI) timing has a significant effect on increasing the homogeneity of the air–fuel mixture in an reactivity controlled compression ignition (RCCI) engine. In this paper, the impact of the SOI timing from 14 deg to 74 deg before top dead center (bTDC) and different inlet valve closing (IVC) temperatures on natural gas/diesel RCCI performance and emissions have been studied. Also, the simulations carried out by avl fire which is coupled with chemical kinetics. The results showed that in the SOIs of 14 deg, 24 deg, and 34 deg bTDC, the fuel is sprayed into the piston bowl; however, in the SOI of 44 deg bTDC, the fuel collides the bowl rim edge, because of the downward movement of the piston. With the advancement of diesel SOI timing from 14 deg to 74 deg bTDC, two different combustion trends can be observed. However, this advancement leads to a lower CO emission, but it raises the CO2 emission level. Although the pressure is a primary parameter for NOx emission, the difference between the trends of NOx and pressure plots indicates that different factors affect the NOx production and also increase the IVC temperature, and raises the in-cylinder pressure, heat release rate, NOx and CO2 emissions, while it reduces the CO emission.

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