Abstract
The results of comparative diesel and biodiesel (Rapeseed oil Methyl Ester (RME) and Rapeseed Oil (RO)) fuel jet structure studies by optical scanning method are presented. There is an interrelation between the dynamics of fuel jet development by the Common Rail (CR) with single-phase injection and Conventional Design System (CDS) and the parameters of mixture formation, which are typical for transferring the operation of the Diesel Engine (DE) from mineral diesel to RME and RO. The structure of the Diesel Fuel (DF) jet is significantly more heterogeneous by the size and number of droplets in CDS in comparison with CR. From the moment of the injection the presence of zones less saturated with fuel contributes to a relatively short induction period – 5° ca. compared to 11…12° ca. in the CR system. Using RME in the CR system in comparison with DF, increases the heterogeneity of the fuel jet, thereby causing a shorter (by 1…2° ca.) induction period in the whole investigated range of injection pressures of 60…160 MPa. The injection of a non-heated RO is accompanied by the shape and structure fluctuations of the fuel jet. RO heating to 65 °C stabilizes the structure of the jet and increases the share of less saturated zones. Promising way of use for the optical scanning method in the mathematical modelling of the DE working process is proposed.
Highlights
The limited world reserves of petroleum fuels, increasing consumption and greenhouse gas emissions contribute to transfer of the Diesel Engine (DE) to alternative renewable fuels – biodiesel
The objectives of the research were: –– determination of fuel jet structure and dynamics development features in the fuel supply systems under study in correlation with the self-ignition and combustion dynamics of diesel and alternative fuels; –– study of the influence of fuel supply system design and adjustment parameters on the structure and development dynamics of the fuel jet; –– evaluation of the viable optical sensing method uses in the research of fuel supply system characteristics in DEs
Fuel is supplied into the injector at a given pressure: from 60 to 180 MPa in the Common Rail (CR) system and ~65.0 MPa in the Conventional Design System (CDS) system (1750 min–1)
Summary
The limited world reserves of petroleum fuels, increasing consumption and greenhouse gas emissions contribute to transfer of the DE to alternative renewable fuels – biodiesel. In the EU countries, the dynamics of this substitution is regulated by a number of European Parliament directives (EC 2005, 2009). In Directive 2009/28/EC it is planned to reach 10% share of renewable energy in the transport sector by 2020. The transport sector strategic development document for the EU countries, White Paper, calls for use of biofuel in the transport sector instead of mineral fuel (EC 2011). In the Western countries, certified methyl and ethyl esters of vegetable oil fatty acids (FAME, FAEE) are used as biodiesel. In EU countries – RME certified in accordance with the EN 14214:2009
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
