Hot Surface Ignition of Gasoline-Ethanol Fuel Mixtures

Ebersole, Roy E.; Matusz, Linda C.; Modi, Manoj S.; Orlando, Ronald E.

doi:10.4271/2009-01-0016

Cited by 9 publications

(3 citation statements)

References 5 publications

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“…Basic analysis of this trend would suggest that the adoption of E50 and E85 fuels should be accelerated, particularly with E85; however, considerations to the feasibility of these fuels should be given with respect to hardware capabilities. High-ethanol-concentration biofuels will require extensive hardware modifications to become the standard fuel, with colder operation spark plugs and material selection developments required to facilitate the use of these fuels [23,24]. The lack of consideration to fuel lubricant interactions, due to the limitations of the 1D simulation tool, may also alter the perception of higher-concentration biofuels and their relative benefits, with the frequency at high concentrations generally deemed to be driven by charge cooling and impingement effects [10,17,18], which are not addressed by this study.…”

Section: Experimentation Resultsmentioning

confidence: 99%

Biofuel Concentration in Low-Speed Pre-Ignition in Gasoline Engines

Relf,

Petrovich,

Ebrahimi

2024

Fuels

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Low-Speed Pre-Ignition (LSPI) is a destructive combustion event associated primarily with new, ultra-efficient, downsized gasoline engines, which provide efficiency benefits in general operation. Biofuels, specifically bio-gasoline, are an alternative fuel that attempts to reduce the harmful emissions output by modern Internal Combustion Engines (ICEs). This study attempts to understand the effect of biofuel use on LSPI, through the use of a numerical simulation tool developed in Ricardo Wave. Development of the tool includes the integration of RFlame, an extension capable of modeling autoignition within a 1D domain. Use of the tool highlights the impact of five ethanol blends, E10, E20, E30, E50 and E85, with clear impacts on both the severity and frequency of LSPI events correlated with chemical properties, such as the enthalpy of vaporization (HoV) and octane number. E30 is highlighted as the critical blend for LSPI severity, with both increased severity and intensity seen with a 30% concentration, and a greater sensitivity to effects such as the start of ignition (SOI). Higher-concentration biofuels, such as E50 and E85 bio-gasoline, show much more favorable behaviors, such as a vast reduction in end-gas knock events, but are limited in their use due to their deployment being both cost-prohibitive and potentially damaging in current hardware. Future work on this topic will surround the further development of the simulation tool to integrate 3D solving elements, understand the role of fluid interactions in LSPI, and study optimal fuel characteristics for future use in ICEs.

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Section: Experimentation Resultsmentioning

confidence: 99%

Biofuel Concentration in Low-Speed Pre-Ignition in Gasoline Engines

Relf,

Petrovich,

Ebrahimi

2024

Fuels

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“…̇ ue ue ( ̇ ue ̇air )ue -air ue (5) In order to investigate the relationship between evaporation capacity and ER of the leaking fuel on the hot surface, the volume of fluid (VOF) model is used in FLUENT. VOF model is applied to simulate the evaporation phase transition process of leaking fuel HSI, and the analysis process follows the control volume principle.…”

Section: Gaseous Phase Of Leaking Fuel Changes With Temperature On Ho...mentioning

confidence: 99%

“…HSIs of flammable and combustible liquids are the most common risks in mechanical equipment where the high-speed running and expected failures. Ebersole [5] have conducted the testing to show that several factors play a role in influencing HSI, such as the structure of fuel, fluid flow rate, hot surface geometry and environmental factors. In unconfined environment, the mechanical ventilation flows over the hot surface and natural convection moves the flammable, resulting in extension of HSI delay time [6][7].…”

Section: Introductionmentioning

confidence: 99%

Research on hot surface ignition characteristics of leaking fuel in ship engine room

et al. 2023

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Hot surface ignition (HSI) is crucial in safety management of maritime industry. In present work, three-dimensional numerical simulations using FLUENT of ship engine room (SER) model and ignition process of a leaking marine fuel by a high-temperature hot surface are carried out. The thermal mechanism and HSI characteristics are revealed. Meanwhile, effect of ventilation and wettability on influencing leaking fuel HSI process in SER are further analyzed. HSI process of evaporated fuel indicates different characteristics, such as ignition delay, stable combustion and extinguishing. The results suggest that the strengthen of SER condition directly promotes liquid flow and ignition of leaking fuel on hot surface.

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