Experimental study of spray analysis for Palmarosa biodiesel‐diesel blends in a constant volume chamber

Abstract

The diesel spray process is one of the critical development zones in terms of diesel engine-out emission regulations. Detailed analysis of Palmarosa oil methyl esters fuel spray properties has been studied and made a comparison analysis with mineral diesel. Experiments under various injection pressures (200, 225, and 250 bars) have been investigated in a constant volume chamber (CVC). Studies have shown that the longest and shortest spray tip penetrations (STPs) for biodiesel and diesel were observed. A higher spray cone angle of about 17.5 ms for PMO fuels and 11.4 ms for diesel were found. The Sauter mean diameter for all test blends decreased with an increase in fuel injection pressure with the maximum reduction of 15 μm. Additionally, the spray volume of 0.4 cm 3 and spray area of 5 cm 2 increased respectively during 250 bars injection pressure. STP increased by 14.3 ms for Palmarosa oil methyl ester than diesel at 250 bars injection pressure. It is concluded that the fuel properties such as density and viscosity are the main influencing factors for spray analysis and play a significant role in the fuel injection system.

Spray Analysis of Biodiesels Derived from Various Biomass Resources in a Constant Volume Spray Chamber

“…Higher viscosities of biodiesels than diesel can cause higher frictions around the injector needle, and this can result in slower needle lift movement causing longer injection delays . This result is consistent with the several literature studies. ,,− …”

“… 39 , 61 Consequently, biodiesels’ larger viscosity and surface tension effects caused lower spray areas than diesel under chamber pressures of 5 and 10 bar, despite their relatively higher SPL values. 65 …”

Critical Review on Effects of Alcohols and Nanoadditives on Performance and Emission in Low-Temperature Combustion Engines: Advances and Perspectives

“…They also noticed a decrease in smoke and NO x emissions, a considerable decrease in fuel utilization, and increased energy output. Furthermore, while the alcohol-diesel mixes greatly lower smoke and particulate emissions, the effects of other gases are affected by a range of parameters, including engine supply systems, exhaust control measures, and engine test processes. − The automobile sector is confronted with significant problems, including the need for better engines, drive train electrification, and the substitution of fossil fuels with alternatives to reduce greenhouse gas emissions. As a result, fuel and engine technologies have a twin challenge in lowering fuel usage and greenhouse gas emissions. − In this situation, novel concepts and efficient combustion procedures are increasingly relevant, such as enhanced spray atomization, A/F mixing, lower local equivalence ratios, lower peak temperature inside the combustion cylinder, and higher combustion rates.…”

Experimental investigation of spray characteristics of ethyl esters in a constant volume chamber

“…SCA can be defined as the angle between the tip of the injector and the two outermost points on the spray boundary. SCA can be measured from the points corresponding to 50% of the spray length according to the literature [44,59,60]. The spray images were recorded by a high-speed camera during the experiments.…”