Investigation on effect of equivalence ratio and engine speed on homogeneous charge compression ignition combustion using chemistry based CFD code

Ghafouri, Jafar; Shafee, Sina; Maghbouli, Amin

doi:10.2298/tsci130204128g

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…These engines are often called hybrid engines as the ignition process is a mix of conventional spark-ignition and compression ignition technologies [29,30]. In an HCCI engine, the fuel is homogenously mixed with air in the combustion chamber.…”

Section: Homogeneous Charge Compression Ignitionmentioning

confidence: 99%

“…The working principle of an HCCI engine is that it operates with a premixed charge reacting volumetrically along the entire length of the cylinder. It incorporates the best features of conventional compression ignition and spark ignition [29]. Using HCCI in internal combustion engines meets economic demands, conserves energy, and is environmental-friendly.…”

Section: Homogeneous Charge Compression Ignitionmentioning

confidence: 99%

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The use of different types of piston in an HCCI engine: A review

Aljaberi¹,

Hairuddin²,

Aziz³

2017

Int. J. Automot. Mech. Eng.

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Homogenous charge compression ignition (HCCI) combines the advantages of spark ignition (SI) and compression ignition (CI) engines to improve fuel consumption and emission levels. HCCI engines have the advantage of relatively higher engine efficiency than SI engines while maintaining lower emissions levels than CI engines. Combustion in HCCI engines occurs spontaneously at any location once the fuel-air mixture reaches its chemical activation energy. Pistons have a major effect on controlling the combustion inside the combustion chamber of an HCCI engine. Many researchers have studied various designs for pistons to improve HCCI engines. The aim of this study is to explore these different types of pistons and their designs in terms of improving the performance of HCCI engines fuelled with gasoline. The most common pistons used in HCCI are twostroke pistons, bowl types, specialised pistons, and dome-shaped pistons; each offers distinct advantages and disadvantages. Software simulation is the latest way of determining the best piston to be used for HCCI engines, as it is more cost effective and less time consuming than experiments. Overall, bowl type pistons offer reduced fuel consumption and a higher load capacity when used in an HCCI engine.

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Section: Homogeneous Charge Compression Ignitionmentioning

confidence: 99%

Section: Homogeneous Charge Compression Ignitionmentioning

confidence: 99%

The use of different types of piston in an HCCI engine: A review

Aljaberi¹,

Hairuddin²,

Aziz³

2017

Int. J. Automot. Mech. Eng.

View full text Add to dashboard Cite

show abstract

“…Many investigations have been done to predict the effect of the equivalence ratio on the HCCI combustion engines. Ghafouri et al [89] examined the effect of variable equivalence ratios on HCCI engine using chemistry based CFD code. They observed that increasing the equivalence ratio has the ability to delay the combustion process.…”

Section: The Equivalence Ratio Effect On Engine Performancementioning

confidence: 99%

Modeling and Simulation of a Free-Piston Engine with Electrical Generator Using HCCI Combustion

Alrbai¹

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Modeling and Simulation of a Free-Piston Engine with Electrical Generator using HCCI Combustion Mohammad Alrbai Free-piston engines have the potential to challenge the conventional crankshaft engines by their design simplicity and higher operational efficiency. Many studies have been performed to overcome the limitations of the free-piston devices especially the stability and control issues The investigations within the presented dissertation aim to satisfy many objectives by employing the approach of chemical kinetics to present the combustion process in the free-piston engine. This approach in addition to its advanced accuracy over the empirical methods, it has many other features like the ability to analyze the engine emissions. The effect of the heat release rate (HRR) on the engine performance is considered as the main objective. Understanding the relation between the HRR and the piston dynamics helps in enhancing the system efficiency and identifying the parameters that affect the overall performance. The dissertation covers some other objectives that belongs to the combustion phasing. Exhaust gas recirculation (EGR), equivalence ratio and the intake temperature represent the main combustion parameters, which have been discussed in this dissertation. To obtain the stability in system performance, the model requires a proper controller to simulate the operation and manage the different system parameters; for this purpose, different controlling techniques have been employed. In addition, the dissertation considers some other topics like engine emissions, fuels and fuels mechanisms. The model of the study describes the processes within a single cylinder, two stroke engine, which includes springs to support higher frequencies, reduce cyclic variations and sustain the engine compression ratio. An electrical generator presents the engine load; the generator supports different load profiles and play the key role in controlling the system. The 1 st law of thermodynamics and Newton`s 2 nd law are applied to couple the piston dynamics with the engine thermodynamics. The model governing equations represent a single zone perfectly stirred reactor (PSR) which contain a perfect mixing ideal gas mixture. The chemical kinetics approach is applied using Cantera/ MATLAB ® toolbox, which presents the combustion process. In this research, a homogenous charge compression ignition (HCCI) at different operational conditions is used. HCCI engines have high efficiencies and low emissions and can work within a wide range of fuels. The results have been presented in a multi-cycle simulation and a parametric study forms. In the case of the multi-cycle simulation, a 100 cycles of the engine operation have been simulated. The overall work that is delivered to the electrical generator presents 47% of the total fuel energy. The model indicates an average frequency of 125 Hz along the operational cycles. In order to eliminate the cyclic variations and ensure a continuous operation, a proportional derivative (PD) controller has been employe...

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Effect of turbulence and multiple injection strategies on homogeneous charge compression ignition (HCCI) diesel engines – a review

Venkateswarlu¹,

Konijeti

2019

International Journal of Ambient Energy

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Investigation on effect of equivalence ratio and engine speed on homogeneous charge compression ignition combustion using chemistry based CFD code

Cited by 3 publications

References 16 publications

The use of different types of piston in an HCCI engine: A review

The use of different types of piston in an HCCI engine: A review

Modeling and Simulation of a Free-Piston Engine with Electrical Generator Using HCCI Combustion

Effect of turbulence and multiple injection strategies on homogeneous charge compression ignition (HCCI) diesel engines – a review

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