Homogeneous charge compression ignition (HCCI) combustion of diesel fuel with external mixture formation

Duraisamy, Ganesh; Nagarajan, G.

doi:10.1016/j.energy.2009.09.005

Cited by 131 publications

(73 citation statements)

References 28 publications

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“…It was found that the results of ECFM-3Z are in good coherence with the experimental results of Ganesh and Figure 4 In-cylinder pressure vs Crank angle at different compression ratios and swirl ratios. Nagarajan [25] and are depicted in Fig. 3.…”

Section: Initial and Boundary Conditionsmentioning

confidence: 99%

“…The variable values on the wall and at the near wall cells are calculated by using hybrid wall functions. [25] experimental results was performed by choosing the same engine boundary conditions and specification. Graphs of performance and emissions with simulation and experimental values are drawn to examine the variation in results.…”

Section: Initial and Boundary Conditionsmentioning

confidence: 99%

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Effective reduction of in-cylinder peak pressures in Homogeneous Charge Compression Ignition Engine – A computational study

Sharma

Rao

Murthy

2015

Alexandria Engineering Journal

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HCCI mode of combustion is known for simultaneous reduction of NOx and PM emissions besides yielding low specific fuel consumption. The nature of volumetric combustion of HCCI engine leads to the development of high peak pressures inside the combustion chamber. This high peak pressures may damage the engine, limiting the HCCI engine life period and thus demands sturdy designs. In this study an attempt is made to analyze computationally the effect of induction swirl in reducing the peak pressures of a HCCI engine under various operating parameters. For the study, specifications of a single cylinder 1.6 L, reentrant piston bowl diesel engine are chosen. For the computational analysis ECFM-3Z model of STARCD is considered. This model is suitable to analyze the combustion processes in SI and CI engines. As HCCI engine is a hybrid version of SI and CI engines, ECFM-3Z model with necessary modifications is used to analyze the peak pressures inside the combustion chamber. The ECFM-3Z model for HCCI mode of combustion is validated with the existing literature to make sure that the results obtaining are accurate. Numerical experiments are performed to study the effect of compression ratio, equivalence ratio, exhaust gas recirculation and boost pressure under different swirl ratios in reducing the in-cylinder peak pressures. The results showed that swirl ratio has a considerable impact in limiting the peak pressures of HCCI engine. The analysis resulted in achieving about 21% reduction in peak pressures are achieved when a swirl ratio of 4 with 30% EGR is adopted when compared to a swirl ratio of 1 with 0% EGR. The study revealed that out of the four operating parameters selected, lower compression ratios, higher EGR concentrations, lower equivalence ratios, lower boost pressures and higher swirl ratios are favorable in reducing the peak pressures. ª 2015 Faculty of Engineering, Alexandria University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Section: Initial and Boundary Conditionsmentioning

confidence: 99%

Section: Initial and Boundary Conditionsmentioning

confidence: 99%

Effective reduction of in-cylinder peak pressures in Homogeneous Charge Compression Ignition Engine – A computational study

Sharma

Rao

Murthy

2015

Alexandria Engineering Journal

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“…Ganesh et al [23] investigated the HCCI combustion on a modified diesel engine using external mixture formation. They incorporated a fuel vaporizer to prepare external mixture without any modification to the combustion chamber.…”

Section: Novel Approach In Realizing Hccimentioning

confidence: 99%

Homogeneous Charge Compression Ignition (HCCI) Engines: A Review

Sharma

Rao

Murthy

2015

Arch Computat Methods Eng

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The homogeneous charge compression ignition (HCCI) combustion is considered to be the principally promising future IC engine concepts. HCCI is a concept of hybrid combustion, between the Otto engine and Diesel engine. HCCI is however not a modern finding. Already in the early twentieth century hot bulb engines operated with an HCCI-like combustion. They were superior in terms of brake efficiency compared with the contemporary gasoline engines and at the same level as the diesel engines. High engine efficiencies and ultra low NO emissions and low particulates are the benefits of HCCI engines. Volumetric auto ignited combustion of the compressed lean air-fuel mixture is attributed to these benefits. There are few drawbacks also were there in HCCI engines like, low specific output, narrow operating range, lack control over the ignition process, long start up time and high emissions like CO and UHC emissions. The CO and UHC emissions can be after treated using catalytic converters. In this study a literature review on HCCI engine has been performed and the parameters affecting the HCCI combustion phasing, performance and emissions were discussed. Strategies to widen the peak load bearing capacity of HCCI engine, reducing the emissions like NOx, CO and UHC, easy autoignition were discussed in the present study.

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“…The ECU used in this work has maximum injection duration of 23 ms with 7 ms delay and minimum injection duration of 0.5 ms with 1.5 ms delay. In order to find the fuel consumption of conventional engine operation at each load, bench test was conducted with ECU by varying the injection duration at an optimum injection pressure of 3 bar [11]. The same condition was used for calculating the fuel consumption of the vaporizer setup at each load.…”

Section: Experimental Setup and Test Proceduresmentioning

confidence: 99%

“…However with HCCI combustion in diesel engines it is possible to develop and produce even cleaner and more fuelefficient vehicles. Pioneering research by Ganesh and Nagarajan [10,11] on HCCI combustion of diesel fuel with external mixture formation technique revealed that NOx emissions reduced by about 45-95% with 0-30% EGR at 75% load compared to conventional diesel combustion. In similar fashion, the smoke emissions reduced by about 40-83% at the same load (75%) with 0-30% EGR compared to that of conventional diesel operation.…”

Section: Introductionmentioning

confidence: 97%

Lean homogenous combustion of E-diesel using external mixture formation technique

Alagumalai¹,

Natarajan²,

Natarajan³

2015

Alexandria Engineering Journal

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For the past one hundred years, lots of easily accessible petroleum fuel has been burned out by humankind in inefficient engines. In this regard, present-day engine researchers face a formidable challenge to achieve the goal of significant improvements in both thermal efficiency and fuel economy. Although the direction to reach this target is critical, homogenous charge compression ignition (HCCI) is just another combustion concept to achieve this target. By the way, this work investigates the combustion phenomena of the HCCI engine by external mixture formation technique. In a nut-shell, an endeavor has been made in this work to prepare homogeneous mixture outside the combustion chamber using a fuel vaporizer system to form a uniform fuel-air mixture. The fundamental research experiments were carried out with vaporized diesel and vaporized e-diesel blends (10% and 20% ethanol substitution by volume), and the results were compared with conventional diesel engine operation. In HCCI mode, the maximum rate of pressure rises and the maximum rate of heat-release significantly reduced with increase of ethanol concentration in diesel. The experimental outcomes exposed that when HCCI engine is operated with e-diesel blend, smooth engine operation is apparent. ª 2015 Faculty of Engineering, Alexandria University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Homogeneous charge compression ignition (HCCI) combustion of diesel fuel with external mixture formation

Cited by 131 publications

References 28 publications

Effective reduction of in-cylinder peak pressures in Homogeneous Charge Compression Ignition Engine – A computational study

Effective reduction of in-cylinder peak pressures in Homogeneous Charge Compression Ignition Engine – A computational study

Homogeneous Charge Compression Ignition (HCCI) Engines: A Review

Lean homogenous combustion of E-diesel using external mixture formation technique

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