Impact of nitric oxide on n-heptane and n-dodecane autoignition in a new high-pressure and high-temperature chamber

Ajrouche, Hugo; Nilaphai, Ob; Hespel, Camille; Foucher, Fabrice

doi:10.1016/j.proci.2018.07.102

Cited by 8 publications

(5 citation statements)

References 24 publications

(29 reference statements)

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“…NO/NO 2 has been found to exhibit strong effects on fuel ignition under high-pressure conditions. − However, the impact of NO/NO 2 addition on the ignition performance of methanol is still scarcely investigated due to a lack of experimental studies. To address this gap, new RCM experiments were conducted to investigate the ignition performance of CH 3 OH/NO/NO 2 mixtures under lean (Φ = 0.6) and stoichiometric (Φ = 1) conditions at engine operating-relevant conditions (20–30 bar, 850–950 K).…”

Section: Resultsmentioning

confidence: 99%

Skeletal CH₃OH/NO_x Kinetic Model for Simulating Spark-Ignition and Turbulent Jet Ignition Engines

Tang,

Silva,

Hakimov

et al. 2024

ACS Omega

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Methanol is a promising renewable fuel for achieving a better engine combustion efficiency and lower exhaust emissions. Under exhaust gas recirculation conditions, trace amounts of nitrogen oxides have been shown to participate in fuel oxidation and impact the ignition characteristics significantly. Despite numerous studies that analyzed the methanol/NO x interaction, no reliable skeletal kinetic mechanism is available for computational fluid dynamics (CFD) modeling. This work focuses on developing a skeletal CH 3 OH/NO x kinetic model consisting of 25 species and 55 irreversible and 27 reversible reactions, used for full-cycle engine combustion simulations. New experiments of methanol with the presence of 200 ppmv NO/NO 2 were conducted in a rapid compression machine (RCM) at engine-relevant conditions (20−30 bar, 850−950 K). Experimental results indicate notable enhancement effects of the presence of NO/NO 2 on methanol ignition under the conditions tested, which highlights the importance of including the CH 3 OH/NO x interactions in predicting combustion performance. The proposed skeletal mechanism was validated against the literature and new methanol and methanol/NO x experiments over a wide range of operating conditions. Furthermore, the skeletal mechanism was applied in three-dimensional (3D) CFD full-cycle simulations of spark-ignition (SI) and turbulent jet ignition (TJI) engine combustion using methanol. Simulation results demonstrate good agreement with experimental measurements of pressure traces and engine metrics, proving that the proposed skeletal mechanism is suitable and sufficient for CFD simulations.

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Section: Resultsmentioning

confidence: 99%

Skeletal CH₃OH/NO_x Kinetic Model for Simulating Spark-Ignition and Turbulent Jet Ignition Engines

Tang,

Silva,

Hakimov

et al. 2024

ACS Omega

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“…-(ii) the NOSE (New One-Shot Engine) setup, initially designed for Spray-A study in ECN framework [35,36] but updated for premixed combustion studies.…”

Section: Methodsmentioning

confidence: 99%

“…The working principle of NOSE consists in using an ideally adiabatic compression process to accurately reproduce high temperature and pressure conditions. The core of the experimental set-up apparatus was firstly characterized and fully described in recent works [35][36][37]. A scheme of NOSE set-up is given in Figure 1.…”

Section: Nose Set-up Characteristicsmentioning

confidence: 99%

Turbulent Flame Speed of a Gasoline surrogate in conditions representative of modern downsized Spark-Ignition engine

Lorenzo

Bréquigny

Foucher

et al. 2022

Combustion and Flame

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“…They are both based on Rapid Compression Machine concept but with different specificities. In the following, the first one is called "New One Shot Engine" (NOSE) [24][25][26] and the second is PPRIME_RCM [27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Characterization of the ECN spray A in different facilities. Part 2: spray vaporization and combustion

Hespel

Houidi

Ajrouche

et al. 2020

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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One of the objective of Engine Combustion Network (ECN), (https://ecn.sandia.gov/) is to provide experimental results with high accuracy in order to validate model and reach new steps in scientific understanding of spray combustion at conditions specific to engines. The ECN community defines different target conditions, experimental diagnostics and post processing methods to facilitate the comparison of experimental and simulations studies performed in different facilities or models. In this context two French laboratories propose two new facilities, based on Rapid Compression Machines to reach the ECN spray A conditions. In this paper, the results of liquid and vapour spray penetration as well as Ignition Delay (ID) and Lift-Off Length (LOL) obtained with these Rapid Compression Machines are compared to the results obtained in the Constant Volume Preburn (CVP) vessel of IFPEN. The specificities of each experimental apparatus allow to bring complementary elements of understanding like confinement effects. In non-reactive condition, the liquid and vapour sprays were characterized by Diffused-Back Illumination and Schlieren technique, and in reactive conditions, the LOL and the ID by OH* chemiluminescence. The analysis of the results with regard to the boundary conditions (temperature, velocity, confinement) make it possible to validate these two new facilities and contribute to enhance the database of ECN, highlighting the confinement effect typical of piston engine operation.

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Impact of nitric oxide on n-heptane and n-dodecane autoignition in a new high-pressure and high-temperature chamber

Cited by 8 publications

References 24 publications

Skeletal CH₃OH/NO_x Kinetic Model for Simulating Spark-Ignition and Turbulent Jet Ignition Engines

Skeletal CH₃OH/NO_x Kinetic Model for Simulating Spark-Ignition and Turbulent Jet Ignition Engines

Turbulent Flame Speed of a Gasoline surrogate in conditions representative of modern downsized Spark-Ignition engine

Characterization of the ECN spray A in different facilities. Part 2: spray vaporization and combustion

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Impact of nitric oxide on n-heptane and n-dodecane autoignition in a new high-pressure and high-temperature chamber

Cited by 8 publications

References 24 publications

Skeletal CH3OH/NOx Kinetic Model for Simulating Spark-Ignition and Turbulent Jet Ignition Engines

Skeletal CH3OH/NOx Kinetic Model for Simulating Spark-Ignition and Turbulent Jet Ignition Engines

Turbulent Flame Speed of a Gasoline surrogate in conditions representative of modern downsized Spark-Ignition engine

Characterization of the ECN spray A in different facilities. Part 2: spray vaporization and combustion

Contact Info

Product

Resources

About

Skeletal CH₃OH/NO_x Kinetic Model for Simulating Spark-Ignition and Turbulent Jet Ignition Engines

Skeletal CH₃OH/NO_x Kinetic Model for Simulating Spark-Ignition and Turbulent Jet Ignition Engines