Title: Effect of B20 and B30 jatropha biodiesel blends on combustion characteristics of mullite coated LHR DI diesel engine

Authors: Sharad P. Jagtap; Anand N. Pawar; Subhash Lahane

Addresses: Department of Mechanical Engineering, JDIET, Yavatmal, Maharashtra, India; Department of Mechanical Engineering, Government Polytechnic, Pen, Dist. Raigad, Maharashtra, 402107, India ' Directorate of Technical Education, Maharashtra State Board of Technical Education, Aurangabad, Maharashtra, 431005, India ' Department of Mechanical Engineering, College of Engineering Pune, Maharashtra, India

Abstract: For conform suitability of biodiesel in an internal combustion engine, the improved performance and reduced emission characteristics are required. These characteristics belong to combustion characteristics of fuel. In the present experimental analysis, various combustion characteristics of conventional and modified engines are analysed for the use of biodiesel blend fuels. For modification, Oerlikon Metco-6150 (Al₂O₃ + SiO₂) mullite powder material was coated on the crown of the piston, cylinder head and both valves of single cylinder DI diesel engine. Coating was carried out by using atmospheric plasma spray process. Characteristics from both engine operations by using two jatropha biodiesel blends (B20 and B30) were compared with the diesel fuelled CE operation. Ignition delay with biodiesel blends B20 and B30 at CE operation was decreased by 0.49°CA and 0.54°CA respectively. It was further reduced during LHRE operation. Similarly, the MRPR with biodiesel blends B20 and B30 at CE operation was decreased by 0.42 bar/°CA and 0.54 bar/°CA respectively. Although the MRPR is slightly higher in LHRE, it was less in CE operation with diesel fuel. By this way, the variations in pressure, temperature, premixed, diffused, after burning, combustion duration, etc. and their effects were discussed.

Keywords: diesel engine; biodiesel; METCO 6150 mullite material; LHR engine.

DOI: 10.1504/IJESD.2022.119392

International Journal of Environment and Sustainable Development, 2022 Vol.21 No.1/2, pp.226 - 241

Received: 11 Dec 2019
Accepted: 05 Nov 2020
Published online: 02 Dec 2021 *

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