2014
DOI: 10.2298/tsci130810013h
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A numerical study of the effects of injection rate shape on combustion and emission of diesel engines

Abstract: The spray characteristics including spray droplet sizes, droplet distribution, spray tip penetration length, and spray diffusion angle directly affects the mixture process of fuel and oxygen and then plays an important role for the improvement of combustion and emission performance of diesel engines. Different injection rate shapes may induce different spray characteristics and then further affect the subsequent combustion and emission performance of diesel engines. In this paper, the spray and combustion proc… Show more

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Cited by 17 publications
(19 citation statements)
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“…With the application of a high-pressure common-rail (HPCR) fuel injection system, the injection strategies of a diesel engine can be flexibly improved. The HPCR fuel injection system allows the adjustment of injection pressure, fuel injection amount, injection timing, and injection pulse number in each cycle [29][30][31]. Therefore, optimized injection strategies can improve in-cylinder combustion for high thermal efficiencies and low emissions.…”
Section: Introductionmentioning
confidence: 99%
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“…With the application of a high-pressure common-rail (HPCR) fuel injection system, the injection strategies of a diesel engine can be flexibly improved. The HPCR fuel injection system allows the adjustment of injection pressure, fuel injection amount, injection timing, and injection pulse number in each cycle [29][30][31]. Therefore, optimized injection strategies can improve in-cylinder combustion for high thermal efficiencies and low emissions.…”
Section: Introductionmentioning
confidence: 99%
“…It can also provide different injection rate shapes, which represent a potential technique to reduce engine emissions. Injection rate shape variations induce different degrees of fuel-air mixing and then further affect the subsequent combustion and emission performance of engines [29,[32][33][34][35][36][37][38], which has been studied by many researchers worldwide. The initial injection rate is quite important for ignition delay, whereas some physical and chemical preparation processes occur before combustion, such as atomization, evaporation, diffusion, and mixing with air during the ignition delay period.…”
Section: Introductionmentioning
confidence: 99%
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“…Lee et., Al., 2007, Pickett, L et., Al, 2013 of the fuel injection rate (Arcoumanis et, Al., 1993, J. Dernotte., et, Al., 2012, Z. He, et, Al., 2014, M. Marčič, et, Al., 1999, L. Postrioti, et, Al., 2014, P. Tinprabath, et, Al., 2015 is very significant in designing marine diesel engines.…”
Section: Introductionmentioning
confidence: 99%
“…Mohan et al [18] studied a boot injection shape through numerical simulations, resulting in reduced emissions compared to a square injection rate shape. He et al [19] performed simulations on a wider variation of injection rate profiles, being the optimal a so-called ''hump" shape, characterized by increased injection rate and velocities in the initial and final stages of the injection event, while reduced values are used in the middle. Benajes et al [20] assessed experimentally the impact of injection rate shaping by implementing a device to modulate the injection pressure along the engine cycle.…”
Section: Introductionmentioning
confidence: 99%