Experimental Study of Injection Characteristics of a Multi-hole port injector on various Fuel Injection pressures and Temperatures

Movahednejad, E.; Ommi, Fathollah; Nekofar, K.

doi:10.1051/epjconf/20134501116

Cited by 8 publications

(5 citation statements)

References 8 publications

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“…In [16] the primary atomization of water jets at high Reynolds numbers was numerically investigated using a multi-scale Eulerian-Lagrangian approach and measured during some experiments. In [17] the authors have experimentally investigated the spray breakup and atomization process of a Port Injector: the focus has been to investigate a fuel injector, but the experimental injector has been fed by water. Fuel injection pressure and temperature have been varied in the range respectively of 2 to 5 bar and of 25°C to 70°C.…”

Section: Literature Surveymentioning

confidence: 99%

PWI and DWI Systems in Modern GDI Engines: Optimization and Comparison Part I: Non-Reacting Flow Analysis

Falfari¹,

Cazzoli²,

Ricci³

et al. 2021

SAE Technical Paper Series

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Currently engine designers are focusing their attention on the improvement of the engine efficiency, led by the reduction of in-cylinder temperature and the adoption of stoichiometric combustion in the full range of the engine operation map. The most demanding points are those close to full power: water injection is thought to help in fulfilling this goal, thus contributing towards more efficient engines. To perform a rapid optimization of the main parameters involved by the water injection process, it is necessary to have reliable CFD methodologies capable of capturing the most important phenomena. In the present work, a methodological approach based on the CFD simulation of non-reacting flows of S.I. GDI turbocharged engines under water injection operation is pursued using AVL Fire code v. 2020. Port Water Injection (PWI) and Direct Water Injection (DWI) have been tested for the same baseline engine configuration and they have been run at full power condition, at the same rated power engine speed by varying: i) the injection pressure; ii) the injection timing (water injection phasing has significant effect on the water evaporation rate and on its impact on walls); iii) the normalized water injected mass on the stoichiometric fuel mass. The main results have been checked in terms of evaporation rate, cooling temperature, and efficiency, also considering the mixture quality and the fluid-dynamics aspects, in particular the possible degeneration of the turbulence level during the water injection process. The main aim of these simulations is to maximize water injection benefits and minimize possible disadvantage, such as primarily oil dilution and incomplete water evaporation to reduce water tank volume and refilling frequency. Water injection has demonstrated to allow to adopt higher compression ratio with limited penalties on performance. Therefore, for pursuing the target of improving the engine efficiency over the whole engine map and maintaining good performance level, the geometric compression ratio of the baseline engine has been increased. The adopted CFD methodology has shown to be able to capture the thermodynamic effects of water injection.

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Section: Literature Surveymentioning

confidence: 99%

PWI and DWI Systems in Modern GDI Engines: Optimization and Comparison Part I: Non-Reacting Flow Analysis

Falfari¹,

Cazzoli²,

Ricci³

et al. 2021

SAE Technical Paper Series

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“…The application of heat flow sensors enables designating the location and the level of the fuel hit upon the injection [21]. Laser diffraction techniques and laser exciting fluorescence also finds application in the fuel spray analysis [1,2,9,15,18,31].…”

Section: Wprowadzeniementioning

confidence: 99%

“…Stosowanie czujników strumienia ciepła umożliwia wyznaczenie lokalizacji i poziomu uderzenia paliwa po wtryśnięciu [21]. Techniki dyfrakcji laserowej i fluorescencji wzbudzanej laserowo znalazły zastosowanie w analizie rozpylania paliwa [1,2,9,15,18,31].…”

Section: Wprowadzenieunclassified

The assessment of correctness of engine adaptation for alternative LPG fueling based on full load engine characteristics of performance

Szpica¹,

Czaban²

2014

Combustion Engines

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The paper presents a set of full load engine characteristics of gasoline and LPG fueled engines. The vehicles were divided into groups according to the type of LPG fueling system. The purpose of the research was to show and assess the differences between torque values as a function of engine speed. Statistics of the distribution of differences were created, based on which the conclusions were formulated. The results of the analysis can constitute a basis for on-road calculations for vehicles fitted with dual fueling system.

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“…The application of heat flow sensors enables characterizing the location and impact level of the fuel upon injection [16]. Another group of research is the technique of laser diffraction and laser-induced-fluorescence used in the analysis of fuel atomization [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Fuel dosage irregularity of LPG pulse vapor injectors at different stages of wear

Szpica¹

2016

mech

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Experimental Study of Injection Characteristics of a Multi-hole port injector on various Fuel Injection pressures and Temperatures

Cited by 8 publications

References 8 publications

PWI and DWI Systems in Modern GDI Engines: Optimization and Comparison Part I: Non-Reacting Flow Analysis

PWI and DWI Systems in Modern GDI Engines: Optimization and Comparison Part I: Non-Reacting Flow Analysis

The assessment of correctness of engine adaptation for alternative LPG fueling based on full load engine characteristics of performance

Fuel dosage irregularity of LPG pulse vapor injectors at different stages of wear

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