The combustion properties such as ignition delay, duration of combustion phases, and rate of pressure rise are important to optimize performance and emission level of diesel engine. Thermo-physical characteristics of diesel and biofuels are different and hence their final outcomes are also different. The objective of the work is to determine combustion characteristics of jatropha biodiesel blends and compare with baseline diesel in conventional engine (CE) as well as low heat rejection engine (LHRE). 10% biodiesel in 90% diesel called B10 and 5% ethanol, 10% biodiesel, and 85% diesel called E05B10 by v/v ratio are used as biodiesel blends. Crown surfaces of piston, cylinder head, and both valves are insulated with 250 µm thick mullite thermal barrier coating material to form LHRE. The ignition delay of baseline diesel with CE is 7.35 °CA at maximum engine load operation. For biodiesel blends B10 and E05B10, it reduces by 0.21 °CA and 0.09 °CA, respectively, in CE operation. It further reduces by 0.27 and 0.11 °CA for B10 and E05B10, respectively, during LHRE operation. Premixed combustion with baseline diesel in CE is 10.54 °CA. For biodiesel blends B10 and E05B10, it is increased by 0.94 and 0.30 °CA, respectively, during CE operation. It is further increased by 1.30 and 0.48 °CA for B10 and E05B10, respectively, during LHRE operation. Thus, the effects on combustion characteristics with biodiesel blend and by adding small amount of ethanol in biodiesel blend are evaluated in both CE as well as LHRE.
Combustion Characteristics of Conventional Diesel Engine and Low Heat Rejection Diesel Engine with Biodiesel Blends
Lect.Notes Mechanical Engineering
National Conference on IC Engines and Combustion ; 2019 ; Kurukshetra, India November 01, 2019 - November 04, 2019
2020-08-19
13 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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