Investigating the Effects of Turbulence Inducement on Diesel Engine Combustion and Emission Characteristics

2003 ◽  
Author(s):  
K. R. Senthilkumar ◽  
K. V. Gopalakrishnan ◽  
Pramod S. Mehta
Keyword(s):  
Diesel Engine ◽  
Fuel Economy ◽  
Direct Injection ◽  
Working Fluid ◽  
Emission Characteristics ◽  
Bluff Bodies ◽  
Thin Wire ◽  
Brake Thermal Efficiency ◽  
Piston Crown ◽  
Engine Combustion

In the present work, the effects of inducing in-cylinder turbulence through bluff bodies or internal jets are experimentally investigated on a direct injection diesel engine. The bluff bodies are placed horizontally across the piston cavity in the form of rods or rods wound with thin wire in different arrangements. The jet turbulence is introduced by holes on the piston crown, allowing a tangential entry of the working fluid into the piston cavity along the direction of swirl. The changes in performance, emission and combustion characteristics of the engine, due to these arrangements, are analyzed. In general, horizontal bluff bodies do not result in significant advantage in fuel economy and smoke levels, but some reduction in NOx concentration is observed. More importantly, it is observed that the internal jets introduced through the tangential holes showed improvement in the engine brake thermal efficiency and exhaust smoke level with a marginal increase in NOx concentration.

Experimental Investigation on the Performance and Emission Characteristics of Di-Diesel Engine Using Diesel-Ethanol Blends with Aqueous Cerium Oxide Nanofluid as Additive

2015 ◽  
Vol 787 ◽  
pp. 741-745 ◽  
Author(s):  
P. Ravichandra Ganesh ◽  
K. Hemachandra Reddy
Keyword(s):  
Experimental Investigation ◽  
Diesel Engine ◽  
Cerium Oxide ◽  
Direct Injection ◽  
Emission Characteristics ◽  
Brake Thermal Efficiency ◽  
Performance And Emission ◽  
Nano Fluid ◽  
Di Diesel Engine ◽  
Ethanol Blends

The paper presents an experimental investigation, to evaluate the performance and emission characteristics of a direct injection diesel engine using diesel-ethanol blends with aqueous cerium oxide nano fluid (ACN) as additive at different load conditions. The test fuel (D85E15ACN) prepared using ultrasonic sonicator, contains diesel 85%, ethanol 15% (D85+E15) by volume, with 1ml of aqueous cerium oxide nanofluid (ACN) added with the blend. The results show that, when the engine is run with D85E15ACN, there is an increase in brake thermal efficiency and reduction in hydrocarbon (HC), carbon monoxide (CO) and smoke emissions, compared to that of neat diesel.However, nitric oxide (NO) emission are more for D85E15ACN.

Effects of Fuel Supply Advance Angles on Performance of Engine Fueled with Butanol Diesel

2014 ◽  
Vol 496-500 ◽  
pp. 724-727
Author(s):  
Ming Wei Xiao ◽  
Jun Han Zhang ◽  
Jin Ge He
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Fuel Economy ◽  
Direct Injection ◽  
Emission Characteristics ◽  
Brake Specific Fuel Consumption ◽  
Performance And Emission ◽  
Fuel Supply ◽  
Hc Emissions ◽  
Load Conditions

The experiments of the fuel economy performance and emission characteristics of diesel engine fueled with butanol diesel were performed on a dual-cylinder direct injection diesel engine at different fuel supply advance angles. The results showed that whether the fuel supply advance angle is too large or too small, it will increase the fuel consumption. As the fuel supply advance angle is 20°CA, the brake specific fuel consumption is the best of the butanol diesel engine. When the supply advance angle becomes larger, the smoke and CO emissions can be reduced on the medium and high loads, but NOX emissions are significantly increased on a variety of load conditions. The engine will obtain the lowest HC emissions, as the fuel supply advance angle is 20°CA.

Performance Improvement on a Single Cylinder Diesel Engine Powered with Pongamia Biodiesel by Incorporating Swirling Grooves

2013 ◽  
Vol 768 ◽  
pp. 199-205 ◽  
Author(s):  
J. Isaac Joshua Ramesh Lalvani ◽  
M. Parthasarathy ◽  
A.V. Arunkumar ◽  
K. Annamalai
Keyword(s):  
Diesel Engine ◽  
Performance Improvement ◽  
Direct Injection ◽  
Constant Depth ◽  
Brake Thermal Efficiency ◽  
Direct Injection Diesel Engine ◽  
Piston Crown ◽  
Biodiesel Blend ◽  
Work Done ◽  
Test Fuel

The motive of the experimentation is to improve the combustion of the direct injection diesel engine powered with biodiesel blend. Initial experimentation was made with the diesel in a conventional unmodified diesel engine. By careful literature survey and technical reviews 20% blend of Pongamia biodiesel with 80% of diesel (B20) had been taken as a test fuel. The swirl motion inside combustion chamber is increased by means of providing the swirling grooves over the piston crown with constant depth 2 mm and variable width of 5.5mm, 6.5 mm and 7.5 mm, unless the previous work done by researches the care has been taken to maintain the compression ratio of the engine. Among the various configurations, the swirling grooves of depth 2mm and width 6.5 mm showed the increase in brake thermal efficiency up to 11 % and decreasing trends in hydrocarbon, carbon monoxide, and smoke emissions. Thus the findings of the present work showed the increase in performance and reduction in the emission of the direct injection diesel engine fuelled with Pongamia biodiesel blend.

scholarly journals EMISSION CHARACTERISTICS OF JATROPHA-ETHANOL AND JATROPHA- DIMETHYL ETHER FUEL BLENDS ON A DI DIESEL ENGINE

2013 ◽  
Vol 42 (1) ◽  
pp. 38-46 ◽  
Author(s):  
M. Loganathan ◽  
A. Anbarasu ◽  
A. Velmurugan
Keyword(s):  
Diesel Engine ◽  
Dimethyl Ether ◽  
Engine Speed ◽  
Engine Performance ◽  
Emission Characteristics ◽  
Brake Thermal Efficiency ◽  
Performance And Emission ◽  
Fuel Blends ◽  
Engine Combustion ◽  
Di Diesel Engine

In this study, Biodiesel -Dimethyl Ether (BDE) and Biodiesel Ethanol (BE) were tested in a 4-cylinderdirect-injection diesel engine to investigate the performance and emission characteristics of the engine underfive engine loads at the maximum torque. The engine speed was maintained at 1500 rpm. Here the jatropha oilis used as a non edible oil to produce the biodiesel. The ethanol and dimethyl ether is used as an additive toenhance the engine combustion. The BDE 5 (biodiesel 95% and dimethyl ether 5%) , BDE 10 (biodiesel 90%and dimethyl ether 10%) BDE 15(biodiesel 85% and dimethyl ether 15%) BE5 (biodiesel 95% and ethanol 5%),BE10 (biodiesel 90% and ethanol 10%) and BE15 (biodiesel 85% and ethanol 15%) were tested in the engine.The results indicate that when compared with neat jatropha, the engine performance increased and emissionlevel decreased with adding the ethanol and diethyl ether with methyl ester of jatropha oil. In comparison withneat jatropha, the BDE5 and BE15 blends have higher brake thermal efficiency (BTE) of 12% and 13%respectively. The experimental results showed that the CO, HC emission is decreased and NOx emission isincreased for higher blends of additives. The brakes specific fuel consumption (BSFC) decreased for BDE5 andBE5 compared to other combination of fuel.DOI: http://dx.doi.org/10.3329/jme.v42i1.15941 

Particulate Emission Characteristics from an Impingement Diffusion Direct Injection Diesel Engine

1994 ◽  
Author(s):  
Hideaki Tanabe ◽  
Masashi Takahashi ◽  
G. Takeshi Sato ◽  
Satoshi Kato ◽  
Shigeru Onishi
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Emission Characteristics ◽  
Particulate Emission ◽  
Direct Injection Diesel Engine

Engine Analysis of Single Cylinder DI Diesel Engine Fuelled With Sunflower Oil, Sunflower Oil Methyl Ester and Its Blends

2006 ◽  
Author(s):  
V. Anandram ◽  
S. Ramakrishnan ◽  
J. Karthick ◽  
S. Saravanan ◽  
G. LakshmiNarayanaRao
Keyword(s):  
Diesel Engine ◽  
Methyl Ester ◽  
Sunflower Oil ◽  
Direct Injection ◽  
Emission Characteristics ◽  
Single Cylinder ◽  
Performance And Emission ◽  
Di Diesel Engine ◽  
Engine Emission ◽  
Oil Sunflower

In the present work, the combustion, performance and emission characteristics of sunflower oil, sunflower methyl ester and its blends were studied and compared with diesel by employing them as fuel in a single cylinder, direct injection, 4.4 KW, air cooled diesel engine. Emission measurements were carried out using five-gas exhaust gas analyzer and smoke meter. The performance characteristics of Sunflower oil, Sunflower methyl ester and its blends were comparable with those of diesel. The components of exhaust such as HC, CO, NOx and soot concentration of the fuels were measured and presented as a function of load and it was observed that the blends had similar performance and emission characteristics as those of diesel. NOx emissions of sunflower oil methyl ester were slightly higher than that of diesel but that of sunflower oil was slightly lower than that of diesel. With respect to the combustion characteristics it was found that the biofuels have lower ignition delay than diesel. The heat release rate was very high for diesel than for the biofuel.

scholarly journals Influence of Chemical Composite Additive on Combustion and Emission Characteristics of a Diesel Engine using Waste Plastic Oil as Fuel and Modified Piston Bowl

2018 ◽  
Vol 34 (6) ◽  
pp. 2806-2813
Author(s):  
Pappula Bridjesh ◽  
Pitchaipillai Periyasamy ◽  
Narayanan Kannaiyan Geetha
Keyword(s):  
Experimental Investigation ◽  
Diesel Engine ◽  
Combustion Chamber ◽  
Emission Characteristics ◽  
Soy Lecithin ◽  
Physiochemical Properties ◽  
Waste Plastic ◽  
Piston Bowl ◽  
Waste Plastic Oil ◽  
Engine Combustion

This experimental investigation is an endeavour to substitute diesel with WPO as fuel on a diesel engine. Enhancing the physiochemical properties of WPO or with hardware modifications on the engine, the performance of engine could not be improved up to the mark. The physiochemical properties of WPO are enhanced by the use of composite additive, which is a mixture of soy lecithin and 2-ethylhexyl nitrate and to improve the in-cylinder air motion; subsequently to increase the swirl and turbulence, standard hemispherical combustion chamber is modified to toroidal spherical grooves combustion chamber. The results of combined effect of modifying the combustion chamber and addition of composite additive suggest that improvements in engine-out emissions can be obtained from current diesel engines by enhancing physiochemical properties of fuel and matching geometry of combustion chamber. Engine combustion and emission characteristics under various loads for various fuels under test are as well studied.

Sign in / Sign up

Export Citation Format

Share Document