Measurement and Modeling of the Flow-Field in a DI Diesel Engine: Effects of Piston Bowl Shape and Engine Speed

1998 ◽  
Author(s):  
P. Béard ◽  
K. Mokaddem ◽  
T. Baritaud
Keyword(s):  
Diesel Engine ◽  
Flow Field ◽  
Engine Speed ◽  
Piston Bowl ◽  
Di Diesel Engine

Modelling and CFD Simulation of Effects of Spray Penetration on Piston Bowl Impingement in a DI Diesel Engine for Biodiesel-Diesel Blend (B20)

2012 ◽  
Author(s):  
Subhash Lahane ◽  
K. A. Subramanian
Keyword(s):  
Diesel Engine ◽  
Cfd Simulation ◽  
Injection Pressure ◽  
Spray Penetration ◽  
Penetration Distance ◽  
Piston Bowl ◽  
Fuel Jet ◽  
Wall Impingement ◽  
Di Diesel Engine ◽  
Nozzle Hole

The effect of spray penetration distance on fuel impingement on piston bowl of a 7.4 kW diesel engine for biodiesel-diesel blend (B20) was studied using modeling and CFD simulation. As the peak inline fuel pressure increased from 460 bar with base diesel to 480 bar with B20, the spray penetration distance (fuel jet) increases. It is observed from the study that the jet tip hits on piston bowl resulting to fuel impingement which is one of durability issues for use of biodiesel blend in the diesel engine. In addition to this, the simulation of effects of different injection pressures up to 2000 bar on spray penetration distance and wall impingement were also studied. The penetration distance increases with increase the in-line fuel pressure and it decreases with decrease nozzle hole diameter. The fuel impingement on piston bowl of the engine with high injection pressure (typically 1800 bar) can be avoided by decreasing the nozzle diameter from 0.19 mm to 0.1 mm. Increase in swirl ratio could also reduce fuel impingement problem.

Performance of a direct injection diesel engine fuelled with a dimethyl ether/diesel blend

2003 ◽  
Vol 217 (9) ◽  
pp. 819-824 ◽  
Author(s):  
Wang Hewu ◽  
Zhou Longbao
Keyword(s):  
Diesel Engine ◽  
Dimethyl Ether ◽  
Engine Speed ◽  
Direct Injection ◽  
Test Results ◽  
Di Diesel Engine ◽  
Hc Emissions ◽  
Blend Fuel ◽  
Co Emission ◽  
Diesel Operation

A quantity of 10 per cent dimethyl ether (DME) was added to diesel fuel, and an investigation of the performance of a direct injection (DI) diesel engine fuelled with blend fuel was carried out. The test results showed that, in comparison with diesel operation, the torque at low engine speed was increased; the brake specific fuel consumption (b.s.f.c.) with speed characteristics at full load was reduced by 20 g/kW h on average; the smoke was reduced significantly, and the coeffcient of light absorption of smoke decreased by 50 per cent; the NOx and HC emissions were also clearly reduced, and the CO emission was at the same level as that of a diesel engine.

Flow Field Measurements inside a Piston Bowl of a Heavy-Duty Diesel Engine

2011 ◽  
Author(s):  
Harri Hillamo ◽  
Teemu Anttinen ◽  
Ulf Aronsson ◽  
Clément Chartier ◽  
Oivind Andersson ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Flow Field ◽  
Field Measurements ◽  
Heavy Duty ◽  
Piston Bowl ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel

scholarly journals CFD Numerical Simulation for Intake Flow Field Design and Effects on Combustion and Emissions of DI Diesel Engine

2019 ◽  
Vol 8 (6S4) ◽  
pp. 287-294
Keyword(s):  
Numerical Simulation ◽  
Diesel Engine ◽  
Flow Field ◽  
Numerical Results ◽  
Excessive Weight ◽  
Di Diesel Engine ◽  
Cfd Numerical Simulation ◽  
Intake Flow ◽  
Flow Field Design

The article takes a gander at inevitable results of logical leisure with whirl enhancing modifications on a right away Injection diesel engine. 4 holes at a diversion over every chamber with estimations of the outlet start from 2, 2.five, 3 and 3.5 mm are through within the chamber with affordable tendency concerning the chamber center factor Numerical guesses are the first-class change to provide clean enduring of the fluid circulate wonder in a DI Diesel Engine. outcomes discover that the unessential beginning of two.five mm (2nd) bypass on an unequalled begin and excessive weight. Spin development just motor vitality massiveness increment with the changing starting widths. The chamber with 2.five mm establishing make a most vital execution improvement while the chambers with excessive broadness than second hole bypass on a to a few diploma chop down execution. whilst the development in partition transversely over develops the move discipline characteristics like spin, the execution decays beyond 2.five mm. considering the execution attitude an ensuing hole gives improved ingesting and finally most outrageous load for the proportional gas implanted. alternate ultimate holes have to a few diploma more fiery debris launch. in view that numerical results exhibited that ensuing hole offers a transcendent. Of all of the splendid numerical modifications the resultant chamber gives stepped forward presentation and lessens the fee and dreary experimentation tests.

An Open Cycle Simulation of DI Diesel Engine Flow Field Effect on Spray Processes

2012 ◽  
Author(s):  
Kohei Fukuda ◽  
Abbas Ghasemi ◽  
Ronald Barron ◽  
Ram Balachandar
Keyword(s):  
Diesel Engine ◽  
Flow Field ◽  
Field Effect ◽  
Cycle Simulation ◽  
Di Diesel Engine ◽  
Open Cycle
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