K. Vijayaraj

Bio: K. Vijayaraj is an academic researcher from Annamalai University. The author has contributed to research in topics: Combustion & Diesel fuel. The author has an hindex of 1, co-authored 1 publications receiving 5 citations.

Combustion characteristics of a DI diesel engine fuelled with blends of methyl ester of cotton seed oil

Abstract: The combustion characteristics of a single-cylinder, four-stroke, air-cooled and direct injection (DI) diesel engine fuelled with methyl ester of cotton seed oil (MECSO) and its blends with neat diesel fuel were examined. The experiments were conducted at a constant speed under steady-state condition with a Kirloskar TAF 1 engine. Combustion characteristics such as cylinder pressure, heat release rate (HRR), cumulative heat release rate (CHRR), maximum cylinder pressure, rate of pressure rise, ignition delay, duration of injection and combustion duration of MECSO and its blends with diesel were evaluated and compared with those of diesel fuel. From the analysis, it was found that the peak cylinder pressure and HRR of diesel were higher when compared with those of MECSO blends. The ignition delay, duration of injection and combustion duration decreased for MECSO blends compared to those of diesel. However, the CHRR of MECSO and its blends were higher than that of diesel. Finally, the study showed that B25 ...

Experimental analysis of combustion characteristics of CI DI VCR engine using mixture of two biodiesel blend with diesel

Abstract: To meet the ever increasing energy demand of the world needs an urgent research to find an alternate fuel for diesel. Biodiesel can be a promising alternate for diesel engine in the years to come. The objective of the present experimental work is to investigate the combustion characteristics of VCR engine using mixture of two biodiesel blend with diesel at 100% or rated load, at constant speed. Simarouba and Jatropha oil are used to prepare, respective biodiesel and mixed in the volume ratio of 75:25, and is designated as B100. The combustion characteristics investigated are cylinder gas pressure, net heat and cumulative heat release, rate of pressure rise, and the mass fraction burned. Investigation is carried out varying load from zero to 100% or rated load of engine with an increment of 20% each time. Influence of blends and compression ratio on the combustion characteristics of engine is investigated. The results reveal that blends results in higher cylinder gas pressure, lesser heat release, higher rate of pressure rise and increased combustion duration. Increasing CR improve the combustion characteristics of engine.

Using Pithecellobium Dulce seed-derived biodiesel combined with Groundnut shell nanoparticles for diesel engines as a well-advised approach toward sustainable waste-to-energy management

Abstract: The present study dealt with the combined effect of Groundnut shell (GS)-originated nanoparticles and biodiesel derived from Pithecellobium Dulce seed on the performance and emission characteristics of a diesel engine. For the fuel-preparation step, GS nanoparticles were pulverized using ball milling, while Pithecellobium Dulce biodiesel was synthesized by using a transesterification process with the support of a Ni-doped ZnO catalyst prepared by the co-precipitation method, resulting in a 5 % higher yield in comparison with using a conventional KOH catalyst. Moreover, both GS and as-prepared biodiesel were characterized through Scanning Electron Microscope, Fourier Transform Infrared Spectroscopy, Differential Scanning Calorimetry, and Thermogravimetric analysis. Relating to the experimental analysis of the engine characteristics, the obtained results disclosed an increase in brake thermal efficiency and a decrease in brake-specific fuel consumption by adding 100 ppm of GS (G100) nanoparticles to the B20 (20 % Pithecellobium Dulce biodiesel/80 % diesel fuel) compared to B20. More importantly, emissions of HC, CO, and smoke decreased for B20 compared to diesel fuel but a further reduction of the above-mentioned emissions was observed for B20/G100. In contrast, CO2 and NOx emissions increased with B20 and B20/G100 in comparison with diesel fuel. Also, the addition of Groundnut shell nanoparticles with biodiesel enhanced the combustion characteristics such as in-cylinder pressure and heat release rate. Indeed, the order of peak in-cylinder pressure and heat release rate was found to be B20/G100 > B20 > diesel fuel, which can be attributed to reasons such as fuel accumulation, ignition delay, and heating value. Finally, this present study showed a viable approach to replace conventional diesel fuel with biodiesel combined with bio-nanoparticles in an eco-friendly manner and sustainability. Further, the present approach could be suitably applied to diesel engines without any modifications.

Artificial Neural Network based prediction of a direct injected diesel engine performance and emission characteristics powered with biodiesel

Abstract: In this assessment, the ANN (Artificial Neural Network) offers the display of a diesel engine using biodiesel fuel to predict engine emissions and overall performance. In order to collect training and testing data for the planned ANN, a single-cylinder, 4-stroke diesel engine will be powered with biodiesel and diesel fuel varieties and will be run at variable load at stable engine rpm. Preliminary outcomes revealed that blends of biodiesel offer higher performance of an engine and enhanced emission qualities. An ANN model was progressed to be envisioning a relationship between brake thermal performance and exhaust emanations, such as carbon monoxide (CO), unburned hydrocarbon (HC), nitrogen oxides (NOx) and smoke intensity, the utilization of biodiesel-diesel blends and loads as input data. Approximately 70% of the overall experimental data was used for training, while 30% was used for testing. In this model, the standard Back-Propagation algorithm for the engine was used. It revealed that the ANN model can predict the engine output and exhaust emissions quite well with a regression coefficient lying closer to one, While the mean square error (MSE) was found to be very low.

Combustion Characteristics of Diesel Combustion System Using Blended Diesel: An Experimental Study

Abstract: This paper deals with the experimental study of combustion characteristic of diesel blended with n-pentane and diethyl ether (DEE). The ignition delay Characteristic of diesel combustion system fuelled with n-Pentane and DEE blends with pure diesel is investigated. The experiment conducted at various pressures and temperatures of air inside the combustion chamber. An experimental set up was designed based on an optical method for the measurement of ignition delay. The result reveals that ignition delay of diesel fuel spray decreases with increases in the temperature and pressure of hot air. Results also show that the effect of methyl group being more dominant at low ignition temperatures whereas the alkyl groups are more effective at higher temperature. The temperature and pressure of hot air inside the combustion chamber are the main factors for ignition delay. Ignition delay of 10% and 20%, n-pentane blends is higher than pure diesel at low temperature while at high temperatures it is nearly equal to the pure diesel. However 30% and 40% n-pentane blends increased the ignition delay. Ignition delay of 10%, 20%, 30% and 40% blends of DEE is lower than pure diesel. DEE reduces the ignition delay of diesel fuel effectively at lower temperatures.

Experimental Analysis of VCR Engine Operated with Prosopis Juliflora Biodiesel Blends

Abstract: This research work indicates the results of analysis conducted to investigate the performance, exhaust emission and combustion characteristics of a VCR diesel engine fuelled with non-edible biodiesel at a rated speed of 1500 rpm with 300 bar injection pressure at three compression ratios. The test fuel was derived from Prosopis Juliflora seed oil methyl ester blends15% (B15) and 25% (B25) by volume. Biodiesel was produced by the transesterii¬cation process using methanol along with KOH as catalyst. The combustion characteristics investigated were rise in cylinder pressures, net heat release rate, cumulative heat release rate and mass fraction of fuel burned at all loads using three compression ratios. The emission and performance study was also conducted. The lower heat release rates, increased cylinder pressures were observed for both the blends compared to diesel. Increased brake thermal efficiency observed at higher compression ratio for B25 blend. It has also been observed that the emissions were decrease in trend with increase in compression ratios.