Calculation of Spray Penetration in Diesel Engines

1969 ◽  
Author(s):  
I. Hakki Öz
Keyword(s):  
Diesel Engines ◽  
Spray Penetration

A Numerical Investigation of Non-Evaporating and Evaporating Diesel Sprays

2008 ◽  
Author(s):  
Sibendu Som ◽  
Suresh K. Aggarwal
Keyword(s):  
Diesel Engines ◽  
Fuel Injection ◽  
Spray Penetration ◽  
Nozzle Orifice ◽  
Fuel Droplets ◽  
Injector Nozzle ◽  
Primary Breakup ◽  
Penetration Data ◽  
Modeling Code ◽  
Breakup Model

Fuel injection characteristics, in particular the atomization and penetration of the fuel droplets, are known to affect emission and particulate formation in diesel engines. It is also well established that the primary atomization process is induced by aerodynamics in the near nozzle region, as well as cavitation and turbulence from the injector nozzle. However, most breakup models used to simulate the primary breakup process in diesel engines only consider the aerodynamically induced breakup. In this paper, the standard breakup models in Diesel Engine modeling code called “CONVERGE” are examined in constant volume spray chamber geometry using the available spray data. Since non-evaporating sprays provide a more stringent test for spray models, the x-ray data from Advanced Photon Source is used for detailed validation of the primary breakup model, especially in the region very close to the nozzle. Extensive validation of the spray models is performed under evaporating conditions using liquid length and spray penetration data. Good agreement is observed for global spray characteristics. However, the breakup model could not reproduce some of the experimental trends reported in literature thus identifying the need for a more comprehensive primary breakup model. An attempt is made to statically couple the internal nozzle flow with spray simulations, and examine the effect of nozzle orifice geometry on spray penetration.

Fuel Spray Penetration in High Pressure Diesel Engines

2007 ◽  
Author(s):  
W. A. Abdelghaffar ◽  
K. Karimi ◽  
M. R. Heikal
Keyword(s):  
High Pressure ◽  
Diesel Engines ◽  
Fuel Spray ◽  
Spray Penetration

The Interaction of Air Motion, Fuel Spray, and Combustion in the Diesel Combustion Process

1972 ◽  
Vol 94 (1) ◽  
pp. 11-14
Author(s):  
R. B. Melton ◽  
A. R. Rogowski
Keyword(s):  
Diesel Engines ◽  
Fuel Injection ◽  
Combustion Process ◽  
Central Area ◽  
Combustion Efficiency ◽  
Fuel Spray ◽  
Spray Penetration ◽  
Buoyancy Forces ◽  
Fluid Jets ◽  
Air Mixing

This paper is pertinent mainly to combustion in open-chamber diesel engines employing air swirl. It is shown how an increase in air swirl rate can cause a marked loss of combustion efficiency unless fuel spray penetration is increased. High swirl reduces radial fuel spray penetration with central injection and the resulting excess fuel in the central area may be trapped by buoyancy forces following ignition, becoming isolated for as much as a tenth of a second in a chamber of four in. diameter. A brief explanation of fuel injection in terms of the mechanics of fluid jets is given and circumstances described in which buoyancy forces assist fuel-air mixing following ignition.

scholarly journals A review of phenomenological spray penetration modeling for diesel engines with advanced injection strategy

2020 ◽  
Vol 12 ◽  
pp. 175682772093406
Author(s):  
Long Liu ◽  
Yan Peng ◽  
Dai Liu ◽  
Changfu Han ◽  
Ningbo Zhao ◽  
...  
Keyword(s):  
Diesel Engines ◽  
Early History ◽  
Energy Crisis ◽  
Diesel Spray ◽  
Comprehensive Understanding ◽  
Spray Penetration ◽  
Modeling Methods ◽  
Combustion Optimization ◽  
Selection Of ◽  
Injection Strategies

Driven by the increasingly remarkable problems of environmental pollution and energy crisis, the combustion optimization of diesel engine seems to be more urgent than ever, therefore, advanced injection strategies are gradually proposed and employed in modern diesel engines. Phenomenological model, which serves as an effective tool to conduct the parametric study on the spray penetration, needs to be improved to fit the intensified injection condition. Since that there are no attempts to review the spray penetration model developments, in order to help to build a comprehensive understanding of diesel spray propagation, this article briefly summarized the early history and introduced the widely used classical and improved phenomenological spray penetration models. Besides, to provide a helpful reference for selection of suitable models, the modeling methods were analyzed and features and simulation of various models were discussed and compared. After that, the trend of modeling methods and promising directions for future spray modeling were suggested.

DEVELOPMENT OF THE COMBUSTION CHAMBER OF GAS ENGINE, CONVERTED ON THE BASIS OF DIESELS D-120 OR D-144 ENGINES TO WORK FOR ON LIQUEFIED PETROLEUM GAS

2019 ◽  
pp. 2-8
Author(s):  
Serhii Kovalov
Keyword(s):  
Combustion Chamber ◽  
Compression Ratio ◽  
Diesel Engines ◽  
Combustion Engine ◽  
Motor Fuel ◽  
Liquefied Petroleum Gas ◽  
Gas Engine ◽  
Chamber Volume ◽  
Motor Fuels ◽  
Dynamic Cycle

The expediency of using vehicles of liquefied petroleum gas as a motor fuel, as com-pared with traditional liquid motor fuels, in particular with diesel fuel, is shown. The advantages of converting diesel engines into gas ICEs with forced ignition with respect to conversion into gas diesel engines are substantiated. The analysis of methods for reducing the compression ratio in diesel engines when converting them into gas ICEs with forced ignition has been carried out. It is shown that for converting diesel engines into gas ICEs with forced ignition, it is advisable to use the Otto thermo-dynamic cycle with a decrease in the geometric degree of compression. The choice is grounded and an open combustion chamber in the form of an inverted axisymmetric “truncated cone” is developed. The proposed shape of the combustion chamber of a gas internal combustion engine for operation in the LPG reduces the geometric compression ratio of D-120 and D-144 diesel engines with an unseparated spherical combustion chamber, which reduces the geometric compression ratio from ε = 16,5 to ε = 9,4. The developed form of the combustion chamber allows the new diesel pistons or diesel pistons which are in operation to be in operation to be refined, instead of making special new gas pistons and to reduce the geometric compression ratio of diesel engines only by increasing the combustion chamber volume in the piston. This method of reducing the geometric degree of compression using conventional lathes is the most technologically advanced and cheap, as well as the least time consuming. Keywords: self-propelled chassis SSh-2540, wheeled tractors, diesel engines D-120 and D-144, gas engine with forced ignition, liquefied petroleum gas (LPG), compression ratio of the internal com-bustion engine, vehicles operating in the LPG.

Sign in / Sign up

Export Citation Format

Share Document