scholarly journals Probing into the Effects of Fuel Injection Pressure and Nozzle Hole Diameter on Spray Characteristics under Ultra-high Injection Pressures Using Advanced Breakup Model

2016 ◽  
Vol 23 (1) ◽  
pp. 238-248 ◽  
Author(s):  
Mahdi Yousefifard ◽  
Parviz Ghadimi ◽  
Seyed Mostafa Mirsalim
Keyword(s):  
Fuel Injection ◽  
Injection Pressure ◽  
Hole Diameter ◽  
Spray Characteristics ◽  
High Injection ◽  
Nozzle Hole ◽  
Fuel Injection Pressure ◽  
Breakup Model ◽  
Injection Pressures

Effects of Fuel Injection Pressure on Spray Characteristics and Vaporization Characteristics of Diesel Fuel Spray

2016 ◽  
Vol 2016 (0) ◽  
pp. G0700102
Author(s):  
Shun SHIMOTSUMAGARI ◽  
Takeru IWAMOTO ◽  
Masaoki SUGIHARA ◽  
Hideki HASHIMOTO ◽  
Osamu MORIUE
Keyword(s):  
Diesel Fuel ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Fuel Spray ◽  
Spray Characteristics ◽  
Fuel Injection Pressure

scholarly journals Optimization of Injection Pressure and Injection Timing on Fuel Sprays, Engine Performances and Emissions on a Developed DI 20C Biodiesel Engine Prototype

2020 ◽  
Vol 38 (4) ◽  
pp. 827-838
Author(s):  
Bambang Sudarmanta ◽  
Alham A.K. Mahanggi ◽  
Dori Yuvenda ◽  
Hary Soebagyo
Keyword(s):  
Fossil Fuels ◽  
Fuel Injection ◽  
Cetane Number ◽  
Injection Pressure ◽  
Injection Timing ◽  
Spray Characteristics ◽  
Injection Parameter ◽  
Optimal Injection ◽  
Fuel Injection Pressure ◽  
Start Of Combustion

Biodiesel, as a renewable fuel that has the potential to replace diesel fossil fuels. With properties in the form of viscosity, density, and surface tension, which are higher than diesel fossil fuel, biodiesel produces poor spray characteristics, and also the high cetane number and oxygen content so that the ignition delay is shorter causes the start of combustion will shift more forward, therefore need to improve injection parameters including injection pressure and timing. The aim of this research is to get the optimal injection parameter optimization so as to improve engine performances and emissions. The method used is to increase the fuel injection pressure from 200 to 230 kg/cm2 and the injection timings were retarded from 22° to 16° BTDC. The results show that increasing injection pressure can improve spray characteristics as indicated by shorter penetration and smaller spray diameter of 30% and 9.8%, respectively and increase in spray spread angle of 21.9%. Then the optimization of engine performances and emissions, obtained at an injection pressure of 230 kg/cm2 and injection timing of 16° BTDC with an increase of power and thermal efficiency of 3.9% and 13.9%, respectively and reduction in smoke emissions of 45.2% at high load.

Injection Characteristics of Coal-Water Slurries in Medium-Speed Diesel Equipment

1992 ◽  
Vol 114 (3) ◽  
pp. 522-527 ◽  
Author(s):  
L. G. Dodge ◽  
T. J. Callahan ◽  
T. W. Ryan ◽  
J. A. Schwalb ◽  
C. E. Benson ◽  
...  
Keyword(s):  
Diesel Fuel ◽  
Cone Angle ◽  
Injection Pressure ◽  
Elevated Pressure ◽  
Injection System ◽  
Spray Characteristics ◽  
Minimal Impact ◽  
Jet Mixing ◽  
High Injection ◽  
Injection Pressures

The injection characteristics of several micronized coal-water slurries (CWSs, where “s” implies plural) were investigated at high injection pressures (40 to 140 MPa, or 6,000 to 20,000 psi). Detailed spray characteristics including drop-size distributions and cone angles were measured using a continuous, high-pressure injection system spraying through various hole shapes and sizes into a continuous, elevated-pressure air flow. Penetration and cone angle were also measured using intermittent injection into an elevated-pressure quiescent chamber. Cone angles and fuel-air mixing increased rapidly with the relatively constant cone angles of diesel fuel. However, even at high injection pressures the CWSs mixed with air more slowly than diesel fuel at the same pressure. The narrower CWS sprays penetrated more rapidly than diesel fuel at the same injection pressures. Increasing injection pressure dramatically reduced drop sizes in the CWS sprays, while increasing injection pressure reduced drop sizes in the diesel fuel sprays more gradually. The CWSs produced larger average drop sizes than the diesel fuel at all conditions, except for some hole shapes at the highest injection pressures where the average sizes were about the same. Varying the hole shape using converging and diverging holes had a minimal impact on the spray characteristics. A turbulent jet mixing model was used to predict the penetration rate of the CWS fuel jets through different orifice sizes and into different air densities. The jet model also computes the liquid fuel-air ratio through the jet. The work reported here was abstracted from the more complete report by Schwalb et al. (1991).

scholarly journals The Effect of High Fuel Injection Pressure on CRDI Diesel Engine Fueled with Algae Biofuel

2020 ◽  
Vol 9 (1) ◽  
pp. 2614-2619
Keyword(s):  
Diesel Engine ◽  
Fuel Injection ◽  
Direct Injection ◽  
Injection Pressure ◽  
Experimental Investigations ◽  
Brake Thermal Efficiency ◽  
Algae Biofuel ◽  
The Difference ◽  
Fuel Injection Pressure ◽  
Injection Pressures

Experimental investigations were conducted to determine the performance & emission features of a common rail direct injection (CRDI) system using algae biofuel to aid diesel engine. The algae biofuel-diesel blends were taken in two different proportions, B10 & B15 (10% and 15% of algae biofuel is mixed with diesel on a volumetric approach). The tests were conducted on CRDI diesel engine at various injection pressures from 600 to 1050 bar with the difference of 150 bar. From the results it was exposed that at high fuel injection pressure (1050 bar), brake thermal efficiency (BTE) improved and brake specific fuel consumption (BSFC) reduced when related with other injection pressures. CO, HC &/smoke density significantly decreases with rise in injection pressures. However, NOx emissions are shown to be increased. At different load conditions, biodiesel algae are associated with higher exhaust gas temperatures.

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