Effect of Injector Nozzle Hole Size and Number on Spray Characteristics and the Performance of a Heavy Duty D.I. Diesel Engine

1996 ◽  
Author(s):  
D. T. Montgomery ◽  
M. Chan ◽  
C. T. Chang ◽  
P. V. Farrell ◽  
Rolf D. Reitz
Keyword(s):  
Diesel Engine ◽  
Hole Size ◽  
Heavy Duty ◽  
Spray Characteristics ◽  
Injector Nozzle ◽  
Nozzle Hole

Combustion sensitivity to the nozzle hole size in an active pre-chamber ultra-lean Heavy-Duty Natural Gas Engine

Energy ◽  
2021 ◽  
pp. 121298
Author(s):  
Gessica Onofrio ◽  
Pierpaolo Napolitano ◽  
Per Tunestå l ◽  
Carlo Beatrice
Keyword(s):  
Natural Gas ◽  
Hole Size ◽  
Heavy Duty ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Nozzle Hole

scholarly journals Effects of Nozzle Shape on the Flow Characteristics of Premix Injector Using Computational Fluid Dynamics (CFD)

2015 ◽  
Vol 773-774 ◽  
pp. 450-454
Author(s):  
Ronny Yii Shi Chin ◽  
Shahrin Hisham Amirnordin ◽  
Amir Khalid
Keyword(s):  
Flow Characteristics ◽  
Fuel Injector ◽  
Spray Characteristics ◽  
Hole Shape ◽  
Injector Nozzle ◽  
K Factor ◽  
Efficient Combustion ◽  
Nozzle Hole ◽  
Nozzle Geometries ◽  
Air Nozzle

The burner system is a patented, unique, higher-efficiency and fuel-injector system that works with a specially designed oil burner to create ultra-efficient combustion that reduces oil use, greenhouse gases and other harmful emissions. This research shows the injector nozzle geometries play a significant role in spray characteristics, atomization and formation of fuel-air mixture in order to improve combustion performance, and decrease some pollutant products from burner system. The aim of this research is to determine the effects of nozzle hole shape on spray characteristics of the premix injector by using CFD. Multiphase of volume of fluid (VOF) cavitating flow inside nozzles are determined by means of steady simulations and Eulerian-Eulerian two-fluid approach is used for performing mixing of Jatropha oil and air. Nozzle flow simulations resulted that cavitation area is strongly dependent on the nozzle hole shape. Conical hole with k-factor of 2 provides higher flow velocity and turbulent kinetic energy compared with conical hole with k-factor of 1.3 and cylindrical hole. The results show that the premix injector nozzle hole shape gives impact to the spray characteristics and indirectly affects the emission of the system.

scholarly journals Analysis of diesel engine injector nozzle spray characteristics fueled with residual fuel oil

Heliyon ◽  
2020 ◽  
Vol 6 (8) ◽  
pp. e04637
Author(s):  
C.H. Achebe ◽  
B.M.O. Ogunedo ◽  
J.L. Chukwuneke ◽  
N.B. Anosike
Keyword(s):  
Diesel Engine ◽  
Fuel Oil ◽  
Spray Characteristics ◽  
Residual Fuel Oil ◽  
Injector Nozzle

Diesel injector nozzle optimization for high CNG substitution in a dual-fuel heavy-duty diesel engine

Fuel ◽  
2020 ◽  
Vol 262 ◽  
pp. 116607 ◽  
Author(s):  
Sunyoup Lee ◽  
Changgi Kim ◽  
Seokhwan Lee ◽  
Jeongwoo Lee ◽  
Junghwan Kim
Keyword(s):  
Diesel Engine ◽  
Dual Fuel ◽  
Heavy Duty ◽  
Injector Nozzle ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel

Modeling the Effect of Injector Nozzle-Hole Layout on Diesel Engine Fuel Consumption and Emissions

2007 ◽  
Author(s):  
Sung Wook Park ◽  
Rolf D. Reitz
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
High Speed ◽  
Pollutant Emissions ◽  
Injection Timing ◽  
Engine Fuel ◽  
Hole Size ◽  
Large Hole ◽  
Hole Configuration ◽  
Nozzle Hole

Numerical simulations were used to study the effect of reduced nozzle hole size and nozzle tip hole configuration on the combustion characteristics of a high speed direct injection diesel engine. The KIVA code coupled with the Chemkin chemistry solver was used for the calculations. The calculations were performed over wide ranges of equivalence ratio, injection timing and injection pressure. Three nozzle hole layouts were considered; the baseline conventional nozzle, and multi- and group-hole configurations. In the multi-hole case, the number of holes was doubled and the hole size was reduced, while keeping the same hole area as for the baseline nozzle. The group-hole configuration used the same hole number and hole size as the multi-hole case, but pairs of holes were grouped with a close (0.2mm) spacing between the holes. The results of the mixture distributions showed that the group hole configuration provides similar penetration and lower inhomogeneity to those of the baseline large hole nozzle with the same nozzle flow area. Consequently, the fuel consumption and pollutant emissions, such as CO and soot, are improved by using the group-hole nozzle instead of the conventional hole nozzle over wide operating ranges. On the other hand, the multi-hole nozzle has advantages in its fuel consumption and CO emissions over the conventional hole layout at intermediate equivalence ratios (equivalence ratios from 0.46–0.84) and conventional injection timings (SOI: 15° BTDC).

Modeling the Effect of Injector Nozzle-Hole Layout on Diesel Engine Fuel Consumption and Emissions

2008 ◽  
Vol 130 (3) ◽  
Author(s):  
Sung Wook Park ◽  
Rolf D. Reitz
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Pollutant Emissions ◽  
Injection Timing ◽  
Base Line ◽  
Engine Fuel ◽  
Hole Size ◽  
Large Hole ◽  
Hole Configuration ◽  
Nozzle Hole

Numerical simulations were used to study the effect of reduced nozzle-hole size and nozzle tip hole configuration on the combustion characteristics of a high speed direct injection diesel engine. The KIVA code coupled with the CHEMKIN chemistry solver was used for the calculations. The calculations were performed over wide ranges of equivalence ratio and injection timing. Three nozzle-hole layouts were considered: the base line conventional nozzle, and multi- and group-hole configurations. In the multihole case, the number of holes was doubled and the hole size was reduced, while keeping the same hole area as for the base line nozzle. The group-hole configuration used the same hole number and hole size as the multihole case, but pairs of holes were grouped with a close (0.2mm) spacing between the holes. The results of the mixture distributions showed that the group-hole configuration provides similar penetration and lower inhomogeneity to those of the base line large hole nozzle with the same nozzle flow area. Consequently, the fuel consumption and pollutant emissions, such as CO and soot, are improved by using the group-hole nozzle instead of the conventional hole nozzle over wide operating ranges. On the other hand, the multihole nozzle has advantages in its fuel consumption and CO emissions over the conventional hole layout at intermediate equivalence ratios (equivalence ratios from 0.56 to 0.84) and conventional injection timings (start of injection: 15deg before top dead center).

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