Correlation Between Flame Pattern, Heat-Release and Emissions for a DI Diesel Engine with Rotating Injector and Variable Swirl

In the paper the rate of heat release analysis in direct injection diesel engine has been presented and discussed. The research has been carried out for two different injection strategies, i.e. for conventional single-phase injection and for triple-phase injection executed by a Common Rail injection system. The calculation methodology of heat release rate based on indicator diagram has been presented as well.

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Eﬀect of EGR on Performances and Emissions of DI Diesel Engine Fueled with Waste Plastic Oil: CDF Approach

Annales de Chimie Science des Matériaux ◽

10.18280/acsm.450304 ◽

2021 ◽

Vol 45 (3) ◽

pp. 217-223

Author(s):

Khatir Naima ◽

Younes Menni ◽

Mounir Alliche ◽

Giulio Lorenzini ◽

Hijaz Ahmad ◽

...

Keyword(s):

Diesel Engine ◽

Heat Release ◽

Release Rate ◽

Injection Timing ◽

Nox Emissions ◽

Cylinder Pressure ◽

Waste Plastic ◽

Waste Plastic Oil ◽

Di Diesel Engine ◽

Fraction Increase

Recently, there is an increasing interest in the pyrolysis of waste plastic into usable fuel as a friendly environment method for waste plastic disposal. The existing literature from various studies stated that the major problem related to the use of WPO in diesel engines is the high NOx emissions level. This paper aims to remedy this problem by suggesting the best EGR percentage with the advanced optimum injection timing. Primary, 5 EGR percentage fractions are considered: 0%, 5%, 15%, 20% and 25% percent. The results showed that 25% is the best percentage regarding emissions. However, a signiﬁcant reduction in mean in-cylinder pressure, temperature, and heat release rate was depicted with the EGR fraction increase. Injection timing is advanced to recoup the decrease in performance. The results showed that 25% of EGR and advanced injection timing by 5 degrees would be better for performances and emissions of DI diesel engine while running with waste plastic oil as an alternative fuel.

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Accurate prediction of the rate of heat release in a modern direct injection diesel engine

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

10.1177/095440700221600805 ◽

2002 ◽

Vol 216 (8) ◽

pp. 663-675 ◽

Cited By ~ 26

Author(s):

P A Lakshminarayanan ◽

Y V Aghav ◽

A D Dani ◽

P S Mehta

Keyword(s):

Diesel Engine ◽

Heat Release ◽

Direct Injection ◽

Turbulent Energy ◽

Operating Conditions ◽

Combustion Model ◽

Injection Velocity ◽

Mixing Rate ◽

Di Diesel Engine ◽

Rate Of Heat Release

An accurate model for the heat release rate in a modern direct injection (DI) diesel engine is newly evolved from the known mixing controlled combustion model. The combustion rate could be precisely described by relating the mixing rate to the turbulent energy created at the exit of the nozzle as a function of the injection velocity and by considering the dissipation of energy in free air and along the wall. The complete absence of tuning constants distinguishes the model from the other zero-dimensional or pseudomultidimensional models, at the same time retaining the simplicity. Successful prediction of the history of heat release in engines widely varying in bores, rated speeds and types of aspirations, at all operating conditions, validated the model.

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