Effect of the Injector Nozzle Hole Diameter and Number on the Spray Characteristics and the Combustion Performance in Medium-Speed Diesel Marine Engines

2005 ◽  
Author(s):  
Byong-Seok Kim ◽  
Wook Hyeon Yoon ◽  
Sung Hyup Ryu ◽  
Ji Soo Ha
Keyword(s):  
Hole Diameter ◽  
Spray Characteristics ◽  
Combustion Performance ◽  
Injector Nozzle ◽  
Medium Speed ◽  
Marine Engines ◽  
Nozzle Hole

G0700504 Effect of nozzle hole diameter on diesel spray characteristics

2015 ◽  
Vol 2015 (0) ◽  
pp. _G0700504--_G0700504-
Author(s):  
Yuki MORIMOTO ◽  
Hironobu UEKI ◽  
Noritsune KAWAHARADA ◽  
Daisaku SAKAGUCHI
Keyword(s):  
Hole Diameter ◽  
Diesel Spray ◽  
Spray Characteristics ◽  
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 Effect of Fuel Injector Nozzle Hole Diameter on Emissions of CAT 3401 Diesel Engine Using CONVERGETM CFD

2019 ◽  
Vol 8 (6) ◽  
pp. 927-932
Keyword(s):  
Diesel Engine ◽  
Cone Angle ◽  
Hole Diameter ◽  
Droplet Radius ◽  
Combustion Model ◽  
Fuel Injector ◽  
Gas Temperature ◽  
Spray Cone ◽  
Injector Nozzle ◽  
Nozzle Hole

Variation of fuel injector nozzle hole is on engine emission and performance is evaluated in present article. Simulation is carried out on caterpillar 3401 diesel engine is using CONVERGE CFD code. A 60° sector model with SAGE combustion model was considered to examine the four different nozzle hole diameters (0.230mm, 0.240mm, 0.250mm, 0.259mm and 0.270mm) and their effect on the engine performance, emissions and spray characteristics. The combustion results showed that nozzle hole diameter of 0.230mm contributed for maximum in-cylinder pressure and temperature due to enhancement in spray cone angle, atomization, and efficient air-fuel mixture. HC, CO, and soot Emissions were found to be decreased with the decrease in nozzle hole diameter, however, due to enhanced atomization and the overall increase in cylinder gas temperature, the NOx emissions were observed to increase for nozzle holes with smaller diameters. Droplet radius for 0.250mm, 0.259mm and 270 mm is found to be larger to the formation of lower jet velocities. Thus nozzle holes with smaller diameter tend to reduce the emissions with a penalty in NOx emission.

A New Optical Access for Medium Speed Large Bore Marine Engines under Full-Load Operating Conditions

2021 ◽  
Vol 14 (6) ◽  
Author(s):  
Stephan Bernhard Karmann ◽  
Christian Kunkel ◽  
Maximilian Prager ◽  
Georg Wachtmeister
Keyword(s):  
Operating Conditions ◽  
Optical Access ◽  
Full Load ◽  
Medium Speed ◽  
Marine Engines
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