Impact of low reactivity fuel type on low load combustion, emissions, and cyclic variations of diesel-ignited dual fuel combustion

Jha, Prabhat R.; Partridge, Kendyl R.; Krishnan, Sundar R.; Srinivasan, Kalyan K.

doi:10.1177/14680874211041993

Title: Impact of low reactivity fuel type on low load combustion, emissions, and cyclic variations of diesel-ignited dual fuel combustion

Journal Article · Fri Aug 27 00:00:00 EDT 2021 · International Journal of Engine Research

DOI:https://doi.org/10.1177/14680874211041993· OSTI ID:1817756

^[1]; Partridge, Kendyl R. ^[2]; Krishnan, Sundar R. ^[2];

^[2]

Textron Specialized Vehicles, Thief River falls, MN, USA
The University of Alabama, Tuscaloosa, AL, USA

In this study, cyclic variations in dual fuel combustion with diesel ignition of three different low reactivity fuels (methane, propane, and gasoline) are examined under identical operating conditions. Experiments were performed on a single cylinder research engine (SCRE) at a low load of 3.3 bar brake mean effective pressure (BMEP). The start of injection (SOI) of diesel was varied from 280 to 330 absolute crank angle degrees (CAD). Engine speed, rail pressure, and boost pressure were held constant at 1500 rpm, 500 bar, and 1.5 bar, respectively. The energy substituted by the low reactivity fuel was fixed at 80% of the total energy input. It was found that diesel-methane (DM) and diesel-propane (DP) combustion were affected by diesel mixing to a greater extent than diesel-gasoline (DG) combustion due to the higher reactivity of gasoline. The magnitude of low temperature heat release was greatest for DG combustion followed by DM and DP combustion for all SOIs. The ignition delay for DG combustion was the shortest, followed by DM and DP combustion. DM and DP combustion exhibited more cyclic variations than DG combustion. Cyclic variations decreased for DM and DP combustion when SOI was advanced; however, DG combustion cyclic variations remained essentially constant for all SOIs. Earlier SOIs (280, 290, 300, and 310 CAD) for DM and (280, 290, and 300 CAD) for DP combustion indicated some prior-cycle effects on the combustion and IMEP (i.e. some level of determinism).

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Sponsoring Organization:: USDOE

OSTI ID:: 1817756

Journal Information:: International Journal of Engine Research, Journal Name: International Journal of Engine Research Vol. 24 Journal Issue: 1; ISSN 1468-0874

Publisher:: SAGE PublicationsCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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