A Review on Liquid Spray Models for Diesel Engine Computational Analysis

2014 ◽  
Author(s):  
Luis Bravo ◽  
Chol-Bum Kweon
Keyword(s):  
Diesel Engine ◽  
Computational Analysis ◽  
Liquid Spray

Liquid Spray Data from an Optical Medium-Speed Diesel Engine and Its Comparison with CFD

2009 ◽  
Author(s):  
Ossi Kaario ◽  
Aki Tilli ◽  
Harri Hillamo ◽  
Teemu Sarjovaara ◽  
Ville Vuorinen ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Optical Medium ◽  
Medium Speed ◽  
Liquid Spray

Experimental and Computational Analysis of Different EGR Systems for a Common Rail Passenger Car Diesel Engine

2009 ◽  
Vol 2 (1) ◽  
pp. 527-538 ◽  
Author(s):  
F. Millo ◽  
C. V. Ferraro ◽  
M. Gianoglio Bernardi ◽  
S. Barbero ◽  
P. Pasero
Keyword(s):  
Diesel Engine ◽  
Computational Analysis ◽  
Common Rail ◽  
Passenger Car

A Study on the Calculation of Heat Release Rate to Compensate the Error Due to Single Zone Assumption in Diesel Engine

2005 ◽  
Author(s):  
Seung Hyup Ryu ◽  
Ki Doo Kim ◽  
Wook Hyeon Yoon ◽  
Ji Soo Ha
Keyword(s):  
Diesel Engine ◽  
Heat Release ◽  
Computational Analysis ◽  
Combustion Process ◽  
Operating Conditions ◽  
Zone Model ◽  
Specific Heats ◽  
Start Of Injection ◽  
Release Analysis ◽  
Improved Model

Accurate heat release analysis based on the cylinder pressure trace is important for evaluating combustion process of diesel engines. However, traditional single-zone heat release models (SZM) have significant limitations due mainly to their simplified assumptions of uniform charge and homogeneity while neglecting local temperature distribution inside cylinder during combustion process. In this study, a heat release analysis based on single-zone model has been evaluated by comparison with computational analysis result using Fire-code, which is based on multi-dimensional model (MDM). The limitations of the single-zone assumption have been estimated. To overcome these limitations, an improved model that includes the effects of spatial non-uniformity has been applied. From this improved single-zone heat release model (Improved-SZM), two effective values of specific heats ratios, denoted by γV and γH in this study, have been introduced. These values are formulated as the function of charge temperature changing rate and overall equivalence ratio by matching the results of the single-zone analysis to those of computational analysis using Fire-code about medium speed marine diesel engine. Also, it is applied that each equation of γV and γH has respectively different slopes according to several meaningful regions such as the start of injection, the end of injection, the maximum cylinder temperature, and the exhaust valve open. This calculation method based on improved single-zone model gives a good agreement with Fire-code results over the whole range of operating conditions.

scholarly journals Computational analysis of mixture(LPG/Air) formation and performancein a dual fuel diesel engine

2021 ◽  
Vol 850 (1) ◽  
pp. 012011
Author(s):  
C J Thomas Renald ◽  
P Somasundaram ◽  
S Yuvaraj ◽  
K Karthikeyan
Keyword(s):  
Diesel Engine ◽  
Gas Flow ◽  
Computational Analysis ◽  
Flow Direction ◽  
Nox Emission ◽  
Dual Fuel ◽  
Ic Engine ◽  
Streamlined Flow ◽  
Flow Boundaries

Abstract This paper focuseson the use of CFD in advancing the LPG/air blend development of a dual fueled IC engine (Diesel and LPG). LPG is introduced through a secondary gas tube to the intake duct of the engine, keeping up 45° point to the flow direction. The variations in the stream boundaries change the output of the engine. Thus there is apossibility for gas tube design to position it and to get an optimized performance. From the previous literatures, CFD tool can be utilized to streamline the gas flow boundaries to improve execution. Familiar programming has been utilized to tackle this issue and approved with trial results. The outcomes show that the streamlined flow boundaries by FLUENT demonstrate 3% improvement in performance of the engine and 11% decrease in NOx emission.

Effect of the injection angle on liquid spray development in a high-speed direct-injection optical diesel engine

2009 ◽  
Vol 223 (8) ◽  
pp. 1077-1092 ◽  
Author(s):  
T-G Fang ◽  
R E Coverdill ◽  
C-F F Lee ◽  
R A White
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
Direct Injection ◽  
Mie Scattering ◽  
Injection Technique ◽  
Injection Timing ◽  
Injection Angle ◽  
Narrow Angle ◽  
Liquid Spray ◽  
Fuel Mixing

In this paper, the spray development and its interaction with the piston geometry were investigated in a small-bore high-speed direct-injection optical diesel engine. The effects of injection angle, injection timing, injection pressure, and injection fuel quantity were studied. The entire liquid spray cycle was visualized by a background-corrected Mie-scattering technique using a high-speed digital video camera synchronized with a high-repetition-rate copper vapour laser. For some conditions, the initial injection velocity was estimated quantitatively. The results show that the injection angle and injection timing predominantly control the spray interaction with the piston geometry and the resulting air—fuel mixing mode. Narrow-angle injection leads to a significantly different air—fuel mixing process from the traditional wide-angle injector. If properly controlled, the narrow-angle direct-injection technique offers more flexibility on injection timing control with the fuel confined in the central bowl region without wetting the cylinder liner.

Sign in / Sign up

Export Citation Format

Share Document