Development and Validation of 3D-CFD Injection and Combustion Models for Dual Fuel Combustion in Diesel Ignited Large Gas Engines

Eder, Lucas; Ban, Marko; Pirker, Gerhard; Vujanović, Milan; Priesching, Peter; Wimmer, Andreas

doi:10.3390/en11030643

Cited by 16 publications

(15 citation statements)

References 48 publications

(65 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, it is convenient to define a substitute fuel that can represent the overall combustion behavior of diesel fuel. For dual fuel investigations, n-heptane is a common diesel substitute [10][11][12][13][14] and was used as a surrogate in this investigation. With a cetane number (describing the ignitability of the fuel) of 56 [15], n-heptane is well suited as surrogate fuel, since, according to the DIN EN590 standard from October 2009, diesel has to show a minimum cetane number of 51 [16].…”

Section: Reaction Mechanism Selectionmentioning

confidence: 99%

A Novel Dual Fuel Reaction Mechanism for Ignition in Natural Gas–Diesel Combustion

et al. 2019

View full text Add to dashboard Cite

In this study, a reaction mechanism is presented that is optimized for the simulation of the dual fuel combustion process using n-heptane and a mixture of methane/propane as surrogate fuels for diesel and natural gas, respectively. By comparing the measured and calculated ignition delay times (IDTs) of different homogeneous methane–propane–n-heptane mixtures, six different n-heptane mechanisms were investigated and evaluated. The selected mechanism was used for computational fluid dynamics (CFD) simulations to calculate the ignition of a diesel spray injected into air and a natural gas–air mixture. The observed deviations between the simulation results and the measurements performed with a rapid compression expansion machine (RCEM) and a combustion vessel motivated the adaptation of the mechanism by adjusting the Arrhenius parameters of individual reactions. For the identification of the reactions suitable for the mechanism adaption, sensitivity and flow analyzes were performed. The adjusted mechanism is able to describe ignition phenomena in the context of natural gas–diesel, i.e., dual fuel combustion.

show abstract

Section: Reaction Mechanism Selectionmentioning

confidence: 99%

A Novel Dual Fuel Reaction Mechanism for Ignition in Natural Gas–Diesel Combustion

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Eder et al [182] presented a 3D CFD model of a Diesel ignited gas engine. The analysis was applied to large engines, typically used for marine application, where conventional diesel systems are going to be hybridized in dual-fuel (natural gas and Diesel) engines.…”

Section: Advanced Combustion Techniques and Fuelsmentioning

confidence: 99%

Recent Advances in the Analysis of Sustainable Energy Systems

et al. 2018

View full text Add to dashboard Cite

EU energy policy is more and more promoting a resilient, efficient and sustainable energy system. Several agreements have been signed in the last few months that set ambitious goals in terms of energy efficiency and emission reductions and to reduce the energy consumption in buildings. These actions are expected to fulfill the goals negotiated at the Paris Agreement in 2015. The successful development of this ambitious energy policy needs to be supported by scientific knowledge: a huge effort must be made in order to develop more efficient energy conversion technologies based both on renewables and fossil fuels. Similarly, researchers are also expected to work on the integration of conventional and novel systems, also taking into account the needs for the management of the novel energy systems in terms of energy storage and devices management. Therefore, a multi-disciplinary approach is required in order to achieve these goals. To ensure that the scientists belonging to the different disciplines are aware of the scientific progress in the other research areas, specific Conferences are periodically organized. One of the most popular conferences in this area is the Sustainable Development of Energy, Water and Environment Systems (SDEWES) Series Conference. The 12th Sustainable Development of Energy, Water and Environment Systems Conference was recently held in Dubrovnik, Croatia. The present Special Issue of Energies, specifically dedicated to the 12th SDEWES Conference, is focused on five main fields: energy policy and energy efficiency in smart energy systems, polygeneration and district heating, advanced combustion techniques and fuels, biomass and building efficiency.

show abstract

“…Due to the slower flame propagation speed of natural gas, pure natural gas engines are suitable for small-scale engines, while dual-fuel engines are usually used for heavy duty and marine engines [2]. Recently, the natural gas dual-fuel marine engine has been widely studied [23][24][25][26][27][28], and typical studies have been done by engine companies such as MAN B&W and Wärtsilä. The advantage of HPDI natural gas engines is the higher thermal efficiency and engine power due to their mixed controlled combustion rate as well as antiknock characteristics.…”

Section: Introductionmentioning

confidence: 99%

An Investigation of the Influence of Gas Injection Rate Shape on High-Pressure Direct-Injection Natural Gas Marine Engines

Wang

Li³

et al. 2019

Energies

View full text Add to dashboard Cite

High-pressure direct-injection (HPDI) natural gas marine engines are widely used because of their higher thermal efficiency and lower emissions. The effects of different injection rate shapes on the combustion and emission characteristics were studied to explore the appropriate gas injection rate shapes for a low-speed HPDI natural gas marine engine. A single-cylinder model was established and the CFD model was validated against experimental data from the literature; then, the combustion and emission characteristics of five different injection rate shapes were analyzed. The results showed that the peak values of in-cylinder pressure and heat release rate profiles of the triangle shape were highest due to the highest maximum injection rate, which occurred in a phase close to the top dead center. The shorter combustion duration of the triangle shape led to higher indicated mean effective pressure (IMEP) and NOx emissions compared with other shapes. The higher initial injection rates of the rectangle and slope shapes had a negative effect on the ignition delay periods of pilot fuel, which resulted in lower in-cylinder temperature and NOx emissions. However, due to the lower in-cylinder temperature, the engine power output was also lower. Otherwise, soot, unburned hydrocarbon (UHC), and CO emissions and indicated specific fuel consumption (ISFC) increased for both rectangle and slope shapes. The trapezoid and wedge shapes achieved a good balance between fuel consumption and emissions.

show abstract

Development and Validation of 3D-CFD Injection and Combustion Models for Dual Fuel Combustion in Diesel Ignited Large Gas Engines

Cited by 16 publications

References 48 publications

A Novel Dual Fuel Reaction Mechanism for Ignition in Natural Gas–Diesel Combustion

A Novel Dual Fuel Reaction Mechanism for Ignition in Natural Gas–Diesel Combustion

Recent Advances in the Analysis of Sustainable Energy Systems

An Investigation of the Influence of Gas Injection Rate Shape on High-Pressure Direct-Injection Natural Gas Marine Engines

Contact Info

Product

Resources

About