Combustion Modeling of Split Injection in HSDI Diesel Engines

Lim, Jaeman; Lee, Sangyul; Min, Kyoungdoug

doi:10.1080/00102202.2010.519012

Cited by 18 publications

(5 citation statements)

References 10 publications

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“…However, in the case of multiple fuel injection, the combustion of the second and subsequent doses of fuel proceeds differently than the first dose, for which spontaneous combustion must occur. For subsequent injections there are significant differences in the phenomena associated with ignition [16]. Firstly, mixture formation takes place under conditions other than during the first injection: at a higher temperature and higher pressure of the medium, and in an environment comprising a mixture of air, fuel vapor and exhaust components, wherein mixture formation is accompanied by already spreading flames.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Heat Release Dynamics in a Compression-Ignition Engine with Multiple Fuel Injection

Chłopek¹,

Lasocki²

2020

ACTA POLYTECH HUNG

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The heat release characteristics of the combustion process in a four-stroke compression-ignition engines depend strongly on the fuel injection strategy. In the case of multiple fuel injection, deviations from the classic heat release model applicable to a single injection are observed. This paper presents the results of empirical tests and their analysis for a single-cylinder compression-ignition research engine with double injection of fuel. The influence of fuel injection pattern on the indicated pressure has been analyzed, in particular the derivative of indicated pressure in respect of the crank angle. The processes of fuel supply and heat release have been investigated in time domain. A correlation analysis of voltage controlling the opening of injector and unit heat release rate have been presented. The delay angle and delay time of unit heat-release rate in respect of the voltage controlling the opening of the injector have been determined. The heat release for each injected fuel dose has been analyzed.

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Section: Introductionmentioning

confidence: 99%

Analysis of Heat Release Dynamics in a Compression-Ignition Engine with Multiple Fuel Injection

Chłopek¹,

Lasocki²

2020

ACTA POLYTECH HUNG

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“…Hasse et al [17,18] applied the representative interactive flamelet (RIF) model for multiple injections. Lim et al [19] extended the RIF model and only applied the 2-dimensional flamelet equations near the stoichiometric region, finding that the ignition delay for the second injection was closely related to the time for the vapour from the second injection to come into contact with the radicals generated in the first injection. Blomberg et al [20] compared the combustion process of split injections using a conditional moment closure model (CMC) within the Reynold-Averaged Navier-Stokes (RANS) and…”

Section: Introductionmentioning

confidence: 99%

Flame–spray interaction and combustion features in split-injection spray flames under diesel engine-like conditions

Zhao

Wei

Jia

et al. 2019

Combustion and Flame

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In compression ignition engines, split-injection has shown great benefits in reducing pollutant emissions and improving combustion efficiency. The objective of this study is to investigate flame-spray interaction and combustion features in split-injection spray flames under diesel engine-like conditions. For this purpose, the effects of key injection parameters, including injection duration, dwell times, are investigated. The numerical model is validated by comparing with the experimental data in terms of the vapour penetration length under inert condition and the flame structures under reactive conditions. Good agreement between the predicted and measured data is observed. The effects of the duration of the first injection and the dwell time between the first and second injections on the combustion process are analysed carefully. It is also found that there are different ignition mechanisms for the first and second injections. The chemical explosive mode 2 analysis (CEMA) method is employed to investigate the autoignition process and flame development for split injections. Different mechanisms are found for the stabilization process.

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“…The spray mixture formation processes also depend on the injection mass ratio [20]. At the same time, it will affect the subsequent exothermic process as well [21]. For this reason, a more detailed research on different injection mass ratios for the better applications of split injection strategies deserves to be carried out.…”

Section: Introductionmentioning

confidence: 99%

Temporal Evolution of Split-Injected Fuel Spray at Elevated Chamber Pressures

2019

Energies

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For reducing soot and NOx emissions, an effective method is to apply split injection strategies. In this research, characteristics of split injection were investigated by applying the pilot-main injection strategy and main-post injection strategy. The injection mass of fuel with the two strategies was measured by an in-house fuel injection rate test system based on the Bosch method. The development of spray tip and tail penetrations, as well as the evolvement of the spray angle when applying these two injection strategies, were explored by employing the high speed shadowgraphy at various injection pressures and surrounding gas densities. The results indicate the tail penetration rate of spray has no relation to the fuel injection pressure. However, the increased injection pressure causes a faster penetration development in the spray tip position. It was also found that the spray tip penetration rate of the second spray is slightly slower than that of the first spray at the beginning stage of injection, but it was significantly larger than the first one at the later stage.

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Combustion Modeling of Split Injection in HSDI Diesel Engines

Cited by 18 publications

References 10 publications

Analysis of Heat Release Dynamics in a Compression-Ignition Engine with Multiple Fuel Injection

Analysis of Heat Release Dynamics in a Compression-Ignition Engine with Multiple Fuel Injection

Flame–spray interaction and combustion features in split-injection spray flames under diesel engine-like conditions

Temporal Evolution of Split-Injected Fuel Spray at Elevated Chamber Pressures

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