On the combustion of premixed gasoline - natural gas dual fuel blends in an optical SI engine

• Autorzy: Petrakides S. , Butcher D. , Pezouvanis A. , Chen R.
• Języki publikacji: EN

Abstrakty

EN

Natural Gas (NG) is a promising alternative fuel. Historically, the slow burning velocity of NG poses significant challenges for its utilisation in energy efficient Spark Ignited (SI) engines. It has been experimentally observed that a binary blend of NG and gasoline has the potential to accelerate the combustion process in an SI engine, resulting in a faster combustion even in comparison to that of the base fuels. The mechanism of such effects remains unclear. In this work, an optical diagnosis has been integrated with in-cylinder pressure analysis to investigate the mechanism of flame velocity and stability with the addition of NG to gasoline in a binary Dual Fuel (DF) blend. Experiments were performed under a sweep of engine load, quantified by the engine intake Manifold Air Pressure (MAP) (0.44, 0.51. 0.61 bar) and equivalence air to fuel ratio (Φ = 0.8, 0.83, 1, 1.25). NG was added to a gasoline fuelled engine in three different energy ratios 25%, 50% and 75%. The results showed that within the flamelet combustion regime, the effect of Markstein length dominates the lean burn combustion process both from a stability and velocity prospective. The effect of the laminar burning velocity on the combustion process gradually increases as the air fuel ratio shifts from stoichiometric to fuel rich values.

Słowa kluczowe

EN

dual fuel; natural gas; engine combustion; flame stretch; Markstein length

PL

paliwo; gaz ziemny; silnik spalinowy; rozciąganie płomienia; długość Marksteina

• Wydawca: Institute of Heat Engineering, Warsaw University of Technology
• Czasopismo: Journal of Power Technologies
• Rocznik: 2018
• Tom: Vol. 98, nr 5
• Strony: 387--395
• Opis fizyczny: Bibliogr. 44 poz., rys., tab., wykr.

Twórcy

autor

Petrakides S.

• Low Carbon Propulsion, InoMob LTD, Paphos, 8020, Cyprus

autor

Butcher D.

• Department of Aeronautical and Automotive Engineering, Loughborough University, United Kingdom

autor

Pezouvanis A.

• Department of Aeronautical and Automotive Engineering, Loughborough University, United Kingdom

autor

Chen R.

• Department of Aeronautical and Automotive Engineering, Loughborough University, United Kingdom

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).