Mechanism of Oxygen Concentration Effects on Combustion Process and Emissions of Diesel Engine

2009 ◽  
Vol 23 (12) ◽  
pp. 5835-5845 ◽  
Author(s):  
Zhaolei Zheng ◽  
Mingfa Yao
Keyword(s):  
Diesel Engine ◽  
Oxygen Concentration ◽  
Combustion Process ◽  
Concentration Effects

scholarly journals The Effect of RME-1-Butanol Blends on Combustion, Performance and Emission of a Direct Injection Diesel Engine

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2941
Author(s):  
Wojciech Tutak ◽  
Arkadiusz Jamrozik ◽  
Karol Grab-Rogaliński
Keyword(s):  
Diesel Engine ◽  
Heat Release ◽  
Direct Injection ◽  
Specific Energy Consumption ◽  
Combustion Process ◽  
Constant Load ◽  
Combustion Stability ◽  
Performance And Emission ◽  
Energy Share ◽  
The Stability

The main objective of this study was assessment of the performance, emissions and combustion characteristics of a diesel engine using RME–1-butanol blends. In assessing the combustion process, great importance was placed on evaluating the stability of this process. Not only were the typical COVIMEP indicators assessed, but also the non-burnability of the characteristic combustion stages: ignition delay, time of 50% heat release and the end of combustion. The evaluation of the combustion process based on the analysis of heat release. The tests carried out on a 1-cylinder diesel engine operating at a constant load. Research and evaluation of the combustion process of a mixture of RME and 1-butanol carried out for the entire range of shares of both fuels up to 90% of 1-butanol energetic fraction. The participation of butanol in combustion process with RME increased the in-cylinder peak pressure and the heat release rate. With the increase in the share of butanol there was noted a decrease in specific energy consumption and an increase in engine efficiency. The share of butanol improved the combustion stability. There was also an increase in NOx emissions and decrease in CO and soot emissions. The engine can be power by blend up to 80% energy share of butanol.

scholarly journals Study on the Effect of the Nozzle Diameter and Swirl Ratio on the Combustion Process for an Opposed-piston Two-stroke Diesel Engine

2014 ◽  
Vol 61 ◽  
pp. 542-546 ◽  
Author(s):  
Zhenyu Zhang ◽  
Changlu Zhao ◽  
Zhaoyi Xie ◽  
Fujun Zhang ◽  
Zhenfeng Zhao
Keyword(s):  
Diesel Engine ◽  
Combustion Process ◽  
Nozzle Diameter ◽  
Swirl Ratio

Characterisation of the Injection-Combustion Process in a Common Rail D.I. Diesel Engine Running with Sasol Fischer-Tropsch Fuel

2000 ◽  
Author(s):  
Francisco Payri ◽  
Jean Arrègle ◽  
Carlos Fenollosa ◽  
Gérard Belot ◽  
Alain Delage ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Combustion Process ◽  
Common Rail ◽  
Fischer Tropsch

Evaluation of temporal and spatial distribution of nanometric particles in a diesel engine by broadband optical techniques

2002 ◽  
Vol 3 (2) ◽  
pp. 93-101 ◽  
Author(s):  
F E Corcione ◽  
S S Merola ◽  
B M Vaglieco
Keyword(s):  
Diesel Engine ◽  
Ultrafine Particles ◽  
Combustion Process ◽  
Visible Region ◽  
Diesel Combustion ◽  
Temporal And Spatial Distribution ◽  
Optical Techniques ◽  
Engine Cylinder ◽  
Nanometric Particles ◽  
Temporal And Spatial

In the last few years, there has been an increasing concern about the emissions of ultrafine particles in the atmosphere. A detailed study of the formation and oxidation of these particles in the environment of the diesel engine cylinder presents many experimental difficulties due to the high temperatures, pressures and extremely reactive intermediate species. To allow investigation of the different phases of the diesel combustion process, high temporal and spatial resolution optical techniques were applied in the optically accessible chamber of a diesel engine at fixed engine speed and air-fuel ratio. Simultaneous extinction, scattering and flame chemiluminescence measurements from the ultraviolet to the visible region were carried out in order to study the diesel combustion process from the soot inception to the formation of soot particles, through the growth of their precursors. These species were characterized as carbonaceous nanometric structures and their sizes were evaluated by the Mie theory.

CFD Modelling of the Effects of Injection Timing on the Combustion Process and Emissions in an HSDI Diesel Engine

2012 ◽  
Author(s):  
Raouf Mobasheri ◽  
Zhijun Peng
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
Cfd Simulation ◽  
Direct Injection ◽  
Combustion Process ◽  
Injection Timing ◽  
Cfd Modelling ◽  
Combustion Modeling ◽  
Pressure Trace ◽  
Hsdi Diesel Engine

High-Speed Direct Injection (HSDI) diesel engines are increasingly used in automotive applications due to superior fuel economy. An advanced CFD simulation has been carried out to analyze the effect of injection timing on combustion process and emission characteristics in a four valves 2.0L Ford diesel engine. The calculation was performed from intake valve closing (IVC) to exhaust valve opening (EVO) at constant speed of 1600 rpm. Since the work was concentrated on the spray injection, mixture formation and combustion process, only a 60° sector mesh was employed for the calculations. For combustion modeling, an improved version of the Coherent Flame Model (ECFM-3Z) has been applied accompanied with advanced models for emission modeling. The results of simulation were compared against experimental data. Good agreement of calculated and measured in-cylinder pressure trace and pollutant formation trends were observed for all investigated operating points. In addition, the results showed that the current CFD model can be applied as a beneficial tool for analyzing the parameters of the diesel combustion under HSDI operating condition.

Thermal Analysis of Plastic Contained Decorative Materials under Different Oxygen Concentration

2012 ◽  
Vol 550-553 ◽  
pp. 2786-2790
Author(s):  
Zhen Zhao ◽  
Feng Liu ◽  
Qiang Zhang ◽  
Lei Wang
Keyword(s):  
Thermal Analysis ◽  
Weight Loss ◽  
Oxygen Concentration ◽  
Integral Method ◽  
Combustion Process ◽  
Order Reaction ◽  
Maximum Weight ◽  
Ignition Point ◽  
First Order ◽  
Maximum Weight Loss

The combustion characteristics of decorative materials were studied by thermal analysis. The experiments were performed in three kind of oxygen concentration (7%, 14%, 21%), the heating rate were 15°C/min and 30°C/min respectively. The ignition point and maximum weight loss rated were analyzed. Based on the Coats-Redfern integral method, the results show that the combustion process were first order reaction.

Sign in / Sign up

Export Citation Format

Share Document