Numerical Study on the Effect of Cavitation on Flow and Diesel Fuel Atomization Characteristics

2013 ◽  
Vol 36 (3) ◽  
pp. 474-482 ◽  
Author(s):  
H. Sadegharani ◽  
M. Haghshenasfard ◽  
J. Salimi
Keyword(s):  
Diesel Fuel ◽  
Numerical Study ◽  
Fuel Atomization ◽  
Atomization Characteristics

Production and Analytical Comparison of Atomization Characteristics for Ternary Blends of Biodiesel

2017 ◽  
Vol 8 (4) ◽  
Author(s):  
K. Sudalaiyandi ◽  
K.S. Amirthagadeswaran ◽  
P. Selvan
Keyword(s):  
Diesel Fuel ◽  
Edible Oils ◽  
Exhaust Emission ◽  
Ternary Blends ◽  
Rubber Seed Oil ◽  
Binary Blends ◽  
Rubber Seed ◽  
Biodiesel Blends ◽  
Fuel Atomization ◽  
Atomization Characteristics

By the plenty usage of diesel fuel in automobiles, it is necessary to switch over to the alternate fuel such as biodiesel. Generally non edible oils are blended with diesel after the esterification process. But here ternary biodiesel blends with diesel fuel produce almost equal drop size when compared with some binary blends with large quantities of diesel. The ternary biodiesel blends give less amount exhaust emission than the binary blends with diesel. In this work, biodiesel is produced from linseed and rubber seed oil by trans-esterification process and then the fuel atomization characteristics have been determined, The sauter mean diameter of atomization is also computed by analytically. The ternary blends having 90% diesel and 5% linseed biodiesel, 5% rubber seed biodiesel and also 80% diesel, 10% linseed biodiesel and 10% rubber seed biodiesel are observed to give comparatively similar atomization characteristics of diesel.

Experimental comparison of the spray atomization of heavy and light fuel oil at different temperatures and pressures for pressure-swirl injector

2021 ◽  
pp. 095765092199437
Author(s):  
Elyas Rostami ◽  
Hossein Mahdavy Moghaddam
Keyword(s):  
Film Thickness ◽  
Liquid Film ◽  
Diesel Fuel ◽  
Temperature Increase ◽  
Liquid Film Thickness ◽  
Fuel Oil ◽  
Spray Angle ◽  
Breakup Length ◽  
Fuel Atomization ◽  
Mean Diameter

In this study, the atomization of heavy fuel oil (Mazut) and diesel fuel at different pressures is compared experimentally. Also, the effects of temperature on the Mazut fuel atomization are investigated experimentally. Mass flow rate, discharge coefficient, wavelength, liquid film thickness, ligament diameter, spray angle, breakup length, and sature mean diameter are obtained for the Mazut and diesel fuel. Fuels spray images at different pressures and temperatures are recorded using the shadowgraphy method and analyzed by the image processing technique. Error analysis is performed for the experiments, and the percentage of uncertainty for each parameter is reported. The experimental results are compared with the theoretical results. Also, Curves are proposed and plotted to predict changes in the behavior of atomization parameters. Diesel fuel has less viscosity than Mazut fuel. Diesel fuel has shorter breakup length, wavelength, liquid film thickness, and sature mean diameter than Mazut fuel at the same pressure. Diesel fuel has a larger spray angle and a larger discharge coefficient than Mazut fuel at the same pressure. As the pressure and temperature increase, fuel atomization improves. The viscosity of Mazut fuel is decreased by temperature increase. As the fuel injection pressure and temperature increase, breakup length, wavelength, liquid film thickness, and sature mean diameter decrease; also, spray angle increases.

scholarly journals Influence of Injection Timing on Performance and Exhaust Emission of CI Engine Fuelled with Butanol-Diesel Using a 1D GT-Power Model

Processes ◽  
2019 ◽  
Vol 7 (5) ◽  
pp. 299 ◽  
Author(s):  
Salman Abdu Ahmed ◽  
Song Zhou ◽  
Yuanqing Zhu ◽  
Yongming Feng ◽  
Adil Malik ◽  
...  
Keyword(s):  
Co2 Emissions ◽  
Diesel Fuel ◽  
Numerical Study ◽  
Computational Simulation ◽  
Engine Performance ◽  
Primary Objective ◽  
Exhaust Emission ◽  
Injection Timing ◽  
Brake Mean Effective Pressure ◽  
The Impact

Injection timing variations have a significant effect on the performance and pollutant formation in diesel engines. Numerical study was conducted to investigate the impact of injection timing on engine performance and pollutants in a six-cylinder turbocharged diesel engine. Diesel fuel with different amounts (5%, 15%, and 25% by volume) of n-butanol was used. Simulations were performed at four distinct injection timings (5°, 10°, 20°, 25°CA bTDC) and two distinct loads of brake mean effective pressure (BMEP = 4.5 bar and 10.5 bar) at constant engine speed (1800 rpm) using the GT-Power computational simulation package. The primary objective of this research is to determine the optimum injection timing and optimum blending ratio for improved efficiencies and reduced emissions. Notable improvements in engine performance and pollutant trends were observed for butanol-diesel blends. The addition of butanol to diesel fuel has greatly diminished NOX and CO pollutants but it elevated HC and CO2 emissions. Retarded injection timing decreased NOX and CO2 pollutants while HC and CO2 emissions increased. The results also indicated that early injection timings (20°CA bTDC and 25°CA bTDC) lowered both CO2 and unburned hydrocarbon emissions. Moreover, advanced injection timing slightly improved brake thermal efficiency (BTE) for all engine loads. It is concluded that retarded injection timing, i.e., 10°CA bTDC demonstrated optimum results in terms of performance, combustion and emissions and among the fuels 15B showed good outcome with regard to BTE, higher heat release rate, and lower pollution of HC, CO, and NOx.

Impact of Orifice Angle Configurations on the Droplet Atomization Enhancement of Diesel Fuel in a Group-Hole Nozzle

2011 ◽  
Vol 133 (11) ◽  
Author(s):  
Hyun Kyu Suh ◽  
Chang Sik Lee
Keyword(s):  
Diesel Fuel ◽  
Atmospheric Pressure ◽  
Room Temperature ◽  
Sauter Mean Diameter ◽  
Spray Tip Penetration ◽  
Different Types ◽  
Time Distance ◽  
Atomization Characteristics ◽  
Spray Velocity ◽  
The Relationship

This paper presents the effect of orifice configuration on the droplet atomization characteristics of diesel fuel injected through different types of group-hole nozzle angles, which are converged (θ=−3 deg), parallel (θ=0 deg), and diverged (θ=+3 deg) orifices in atmospheric pressure and room temperature condition (0.1 MPa, 293 K). It was revealed that the parallel hole nozzle has the largest Sauter mean diameter (SMD) value and both sprays from diverged and converged hole nozzles show better atomization. A comparison of spray tip penetration illustrates that as the orifice angle is converged, spray tip penetration becomes longer, and it must be the reason for the fast spray velocity. These results can confirm the relationship among time, distance, and velocity. Therefore, it can be concluded that the droplet atomization enhancement can be expected in the converged nozzle spray rather than in the parallel and diverged nozzle sprays based on the results of smaller SMD, faster velocity, better air utilization, and higher percentage of small size of droplets in the measuring area.

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