Laminar flame speed correlations for pure-hydrogen and high-hydrogen content syngas blends with various diluents

Ravi, S.; Petersen, Eric L.

doi:10.1016/j.ijhydene.2012.09.086

Cited by 44 publications

(34 citation statements)

References 19 publications

(39 reference statements)

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“…Comparing the S L correlation studies [10,12,14,16,21], the equation of Ravi and Petersen [21], which was derived for a wide range of /, was found to be the closest to the present modeling.…”

Section: Temperature Dependencesupporting

confidence: 59%

“…Szabo et al [19] selected rather old mechanism of Maas and Warnatz [20] integrated into the code INSFLA. The study of Ravi and Petersen [21] was motivated by the recent appearance of an updated detailed kinetic model for hydrogen and syngas combustion [22]. They clearly demonstrated that the power exponents a increase with the pressure increase and discussed different approaches of simultaneous description of the burning velocity variation with temperature and pressure.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, for the fair comparison, in Fig. 1 the power exponents a from these works [8,10,12,14,16,18,21] are shown if they were computed at 1 atm. Kusharin et al [23] studied expanding spherical flames experimentally and numerically, and their value of a from the modeling with the mechanism of Warnatz [24] for H 2 + air mixture is also shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effect of temperature on the adiabatic burning velocities of diluted hydrogen flames: A kinetic study using an updated mechanism

Алексеев

Christensen

Konnov

2015

Combustion and Flame

123

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Section: Temperature Dependencesupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The effect of temperature on the adiabatic burning velocities of diluted hydrogen flames: A kinetic study using an updated mechanism

Алексеев

Christensen

Konnov

2015

Combustion and Flame

123

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“…Results of this procedure are presented in Figure 3, where an example of validation is shown using the experiments performed by Mandilas et al 56 and, Ravi and Petersen. 57 In both cases, the model reasonably captures experimental trends when modifying the air-to-fuel ratio. Indeed, simulations offer a good estimation of the laminar flame speed considering a 5% of H 2 fuel blend at high λ values.…”

Section: Numerical Toolsmentioning

confidence: 72%

Advantages of hydrogen addition in a passive pre‐chamber ignited SI engine for passenger car applications

et al. 2021

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Hydrogen is one of the most promising alternative fuels for the transportation industry. The use of hydrogen to enable lean burn in internal combustion engines is an attractive solution for reducing CO 2 emissions from two points of views: the substitution of carbon-based fuels and the increased thermal efficiency due to lean operation. Combining this strategy with the passive prechamber ignition system with gasoline/hydrogen blends is even more interesting. The main limitations of the passive pre-chamber concept in a high compression ratio spark-ignition engine were shown through engine experiments.A numerical study was then performed to evaluate the chance of extending the dilution limit by using hydrogen along with this technology. Results show how the use of hydrogen provides considerable benefits in the main chamber combustion process by enhancing the thermo-chemical properties of the mixture, increasing the flame speed, and improving the flame structure. Using an adequate gasoline-hydrogen blend proved to enable optimum burning rates at lean conditions, leading to a relevant thermal efficiency gain. K E Y W O R D Scomputational fluid dynamics, hydrogen combustion, passive pre-chamber, spark-ignition engine, ultra-lean combustion | INTRODUCTIONEvery year, the energy crisis associated with the world's demand of natural resources, used to power the industrial infrastructure of society, is becoming more urgent. 1 As human population grows, so does the consumption of energy coming from the limited fossil fuels that are available in the planet. Additionally, burning these fuels contributes to the production of greenhouse gases (GHG) like carbon dioxide (CO 2 ), hydro-carbon (HC), and other air-polluting emissions. These facts motivated several global treaties based on multiple research works, such as the Paris Agreement, 2 to aim for a decarbonization of the global energy network to improve sustainability and reduce pollution.List of Symbols/Abbreviations: SI, spark ignition; CI, compression ignition; TJI, turbulent jet ignition; HAJI, hydrogen assisted jet ignition; MC, main combustion chamber; PC, pre-chamber; ICE, internal combustion engine; H 2 ICE, hydrogen internal combustion engine; CFD, computational fluid dynamics; NO x , nitrogen oxides; H 2 , hydrogen; TWC, three-way catalyst; PFI, port fuel injection; DOHC, double over-head camshaft; CO 2 , carbon dioxide; λ, relative air-to-fuel ratio; RON95, 95 research octane number; CCV, cycle-to-cycle variability; TDC, top dead center; CAD, crank-angle degree; HRR, heat release rate; Δp, pressure difference between the pre-chamber and the main chamber; CA50, combustion phasing; IMEP, indicated mean effective pressure; σIMEP, variability of the indicated mean effective pressure; MAPO, maximum amplitude pressure oscillation; MBT, maximum break torque; ST, spark timing; URANS, unsteady Reynoldsaveraged Navier Stokes; ECFM, extended coherent flamelet model; TKE, turbulent kinetic energy; s L , laminar flame speed; l f , flame thickness; l t , turbulence length scale;...

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“…Compared to the list of areas needing further re-290 search, put forward by Verhelst and Wallner [19] and summarized above, there has been little progress in increasing the dataset on fundamental properties. Some further work was devoted to determining the laminar burning velocity of hydrogen mixtures, but this involved mostly generating correlations from chemical kinetic computations [45,46,47], looking in more detail 295 at previously reported conditions [45] or repeating conditions with other measurement techniques [48] rather then expanding the data to more engine-like conditions. It is proving quite hard to surmount the challenges for accurate measurements at these conditions [19].…”

mentioning

confidence: 99%

Recent progress in the use of hydrogen as a fuel for internal combustion engines

Verhelst

2014

International Journal of Hydrogen Energy

375

103

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Hydrogen-fueled internal combustion engines (H 2 ICEs) have been the topic of research for many decades, and contemporary reviews have surveyed the relevant literature. Because of a number of relatively large R&D projects that have been ongoing recently, much progress has been made that is worth 10 reporting. Specifically, this paper reviews the advancements made in plotting the possibilities offered by direct injection of hydrogen, in-cylinder heat transfer, modeling and combustion strategies (on an engine as well as vehicle level). These efforts have resulted in impressive efficiency numbers, both at peak and part load operation, while keeping emissions far below regulatory 15 limits and reaching satisfactory specific power outputs. New demonstration vehicles have been put on the road showing the relatively low barriers (on a vehicle level) to introduce hydrogen engined transportation and these are briefly described. The paper discusses the merits of H 2 ICEs but also what makes them potentially unfit as a realistic alternative. Finally, the paper 20 concludes with the main areas of research that require further efforts.

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Laminar flame speed correlations for pure-hydrogen and high-hydrogen content syngas blends with various diluents

Cited by 44 publications

References 19 publications

The effect of temperature on the adiabatic burning velocities of diluted hydrogen flames: A kinetic study using an updated mechanism

The effect of temperature on the adiabatic burning velocities of diluted hydrogen flames: A kinetic study using an updated mechanism

Advantages of hydrogen addition in a passive pre‐chamber ignited SI engine for passenger car applications

Recent progress in the use of hydrogen as a fuel for internal combustion engines

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