scholarly journals Study of Piston Thermo-Elastic Behaviour under Thermomechanical Solicitations

2019 ◽  
Vol 16 (4) ◽  
pp. 7287-7298 ◽  
Author(s):  
M. Mechalikh ◽  
A. Benhamou ◽  
I. Zidane ◽  
A. Bettahar
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engines ◽  
Direct Injection ◽  
Research Work ◽  
Elastic Behaviour ◽  
Gas Combustion ◽  
Thermomechanical Stress ◽  
Metal Metal ◽  
Long Time ◽  
Material Choice

The piston material choice is a major factor in the design stages of internal combustion engines for its importance to improving the durability and the operation reliability during the piston life cycle. Indeed, even as many researches have been conducted for a long time to improve the piston performances in the diesel engine, considerable numbers of piston damages still significantly occur. This research work is an assessment by the finite element method (FEM) of a set of piston materials for the purpose of being used in a direct injection diesel engine. The main objective is to predict stresses concentrations and the clearance between the piston and the cylinder (to avoid metal-metal adhesion) from thermomechanical solicitations. The stresses and deformations are evaluated in a 3D piston model by using ABAQUS software. A first assessment step is performed in heat convection/conduction modes to determine the temperature distribution. Then, this last one is coupled to the pressure field resulting from the gas combustion in order to compute stresses and the magnitude displacement. The obtained results show that the austenitic steel AS12UNG with fibre-reinforced possess low thermomechanical stress values compared to other material types. This material allows a minimum failure risk and therefore contributes to the enhancement of the piston design.

scholarly journals Performance and Emission Parameters with Blending of Jatropha Biodiesel in Diesel Engine

2020 ◽  
Vol 8 (5) ◽  
pp. 4004-4009
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engines ◽  
Work Performance ◽  
Direct Injection ◽  
Research Work ◽  
Renewable Resource ◽  
Petroleum Products ◽  
Performance And Emission ◽  
Emission Parameter ◽  
Ci Engines

In the current situation limited resources of petroleum products and their higher consumption rate and pollution increase research work for an alternative option for internal combustion engines. The emissions draws from these fuels also pollute the environment more day by day. Jatropha oil from jatropha seed is one sources of biodiesel which is a less polluting, locally available and reliable renewable resource. In this research work, performance and analysis doing on 5 HP single cylinder of vertical arrangement and direct injection CI engines with rope brake dynamometer with a blending of jatropha biodiesel. The performance and emission parameter of the diesel engine were found with different proportions of biodiesel in a existing diesel fuel. The result shows that by using up to 20 % biodiesel in diesel, compatible performance parameters with reduced emissions can be achieved.

scholarly journals On the possibility to decrease the fuel consumption for a heavy-duty truck Diesel engine using the Turbo-compound method: a case study

2019 ◽  
Vol 290 ◽  
pp. 06008
Author(s):  
Bogdan Radu ◽  
Alexandru Racovitza
Keyword(s):  
Diesel Engine ◽  
Heat Release ◽  
Internal Combustion Engines ◽  
Direct Injection ◽  
Large Data ◽  
Gas Emissions ◽  
Main Research ◽  
Injection Methods ◽  
Calculation System ◽  
Release Characteristic

The reduction of Diesel internal combustion engines emissions is one of the major concerns of the engines manufacturers. Despite the fact that the efficiency of the gas post-treatment systems has been significantly improved, decreasing the smoke and the soot from the cylinder inside remains a main research goal. This work is proposing a theoretical study on these pollutants formation for different kinds of direct injection methods. By dividing the in-cylinder injection the heat release characteristic could be modified, leading to different temperature and pressure levels. Using exhaust gas recirculation (EGR) the reduction of the gas temperatures might also be decreased, limiting NOx formation. To evaluate the level of the cylinder gas emissions formation a two-step procedure could be followed. First, by using a numerical calculation system the heat release characteristic can be highlighted concerning a Diesel engine with stratified injection; then, using an experimental relationship applying a large data base, the amount of the gas emissions can be subsequently provided. The authors propose some combinations between injection characteristics and EGR used fractions which could generate successfully results speaking in terms of NOx, soot and smoke formation.

Biofuel (Cooking Oil) Blends Contribution in DI Diesel Engine – Performance & Emission Study

2014 ◽  
Vol 984-985 ◽  
pp. 839-844
Author(s):  
Natesan Kanthavelkumaran ◽  
P. Seenikannan
Keyword(s):  
Diesel Engine ◽  
Rice Bran ◽  
Diesel Fuel ◽  
Rice Bran Oil ◽  
Direct Injection ◽  
Research Work ◽  
Engine Performance ◽  
Performance And Emission ◽  
Emission Study ◽  
Ci Engines

In present scenario researchers focusing the alternate sources of petroleum products. Based on this, current research work focused the emission study of its characteristics and potential as a substitute for Diesel fuel in CI engines. Current research biodiesel is produced by base catalyzed transesterification of rice bran oil is known as Rice Bran Oil Methyl Ester (Biofuel). In this research various proportions of Biofuel and Diesel are prepared on volume basis. It is used as fuels in a four stroke single cylinder direct injection Diesel engine to study the performance and emission characteristics of these fuels. Varieties of results obtained, that shows around 50% reduction in smoke, 33% reduction in HC and 38% reduction in CO emissions. In result discussion a different blends of the brake power and BTE are reduced nearly 2 to 3% and 3 to 4% respectively around 5% increase in the SFC. Therefore it is accomplished from the this experimental work that the blends of Biofuel and Diesel fuel can successfully be used in Diesel engines as an alternative fuel without any modification in the engine. It is also environment friendly blended fuel by the various emission standards.

Experimental Studies on the Performance of C.I Engine with Fish Oil Methyl Ester as Fuel for Various Blends of Diesel and LPG

2015 ◽  
Vol 787 ◽  
pp. 687-691
Author(s):  
Tarigonda Hari Prasad ◽  
R. Meenakshi Reddy ◽  
P. Mallikarjuna Rao
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Alternative Fuels ◽  
Internal Combustion Engines ◽  
Fossil Fuels ◽  
Research Work ◽  
Experimental Studies ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Inlet Manifold

Fossil fuels are exhausting quickly because of incremental utilization rate due to increase population and essential comforts on par with civilization. In this connection, the conventional fuels especially petrol and diesel for internal combustion engines, are getting exhausted at an alarming rate. In order to plan for survival of technology in future it is necessary to plan for alternate fuels. Further, these fossil fuels cause serious environmental problems as they release toxic gases into the atmosphere at high temperatures and concentrations. The predicted global energy consumption is increasing at faster rate. In view of this and many other related issues, these fuels will have to be replaced completely or partially by less harmful alternative, eco-friendly and renewable source fuels for the internal combustion engines. Hence, throughout the world, lot of research work is in progress pertaining to suitability and feasibility of alternative fuels. Biodiesel is one of the promising sources of energy to mitigate both the serious problems of the society viz., depletion of fossil fuels and environmental pollution. In the present work, experiments are carried out on a Single cylinder diesel engine which is commonly used in agricultural sector. Experiments are conducted by fuelling the diesel engine with bio-diesel with LPG through inlet manifold. The engine is properly modified to operate under dual fuel operation using LPG through inlet manifold as fuel along FME as ignition source. The brake thermal efficiency of FME with LPG (2LPM) blend is increased at an average of 5% when compared to the pure diesel fuel. HC emissions of FME with LPG (2LPM) blend are reduced by about at an average of 21% when compared to the pure diesel fuel. CO emissions of FME with LPG (2LPM) blends are reduced at an average of 33.6% when compared to the pure diesel fuel. NOx emissions of FME with LPG (2LPM) blend are reduced at an average of 4.4% when compared to the pure diesel fuel. Smoke opacity of FME with LPG (2LPM) blend is reduced at an average of 10% when compared to the pure diesel fuel.

scholarly journals Experimental investigation and performance evaluation of DI diesel engine fueled by waste oil-diesel mixture in emulsion with water

2009 ◽  
Vol 13 (3) ◽  
pp. 83-89 ◽  
Author(s):  
Kasianantham Nanthagopal ◽  
Rayapati Subbarao
Keyword(s):  
Diesel Engine ◽  
Water Content ◽  
Internal Combustion Engines ◽  
Direct Injection ◽  
Waste Cooking Oil ◽  
Petroleum Products ◽  
Partial Substitution ◽  
Performance And Emission ◽  
Pollution Levels ◽  
Cooking Oil

Exploitation of the natural reserves of petroleum products has put a tremendous onus on the automotive industry. Increasing pollution levels and the depletion of the petroleum reserves have lead to the search for alternate fuel sources for internal combustion engines. Usage of vegetable oils poses some challenges like poor spray penetration, valve sticking and clogging of injector nozzles. Most of these problems may be solved by partial substitution of diesel with vegetable oil. In this work, the performance and emission characteristics of a direct injection diesel engine fueled by waste cooking oil-diesel emulsion with different water contents are evaluated. The use of waste cooking oil-diesel emulsion lowers the peak temperature, which reduces the formation of NOx. Moreover the phenomenon of micro explosion that results during the combustion of an emulsified fuel finely atomizes the fuel droplets and thus enhances combustion. Experiments show that CO concentration is reduced as the water content is increased and it is seen that 20% water content gives optimum results. Also, there is a significant reduction in NOx emissions.

Engine Performance and Emission Products of Pure Diesel and Multi-Feedstock Blended Biodiesel

2014 ◽  
Author(s):  
Kosgei Belion ◽  
Patrick F. Mensah ◽  
Stephen Akwaboa ◽  
Eyassu Woldesenbet ◽  
Michael Stubblefield ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engines ◽  
Renewable Energy Sources ◽  
Direct Injection ◽  
Engine Performance ◽  
Combustion Products ◽  
Performance And Emission ◽  
Engine Efficiency ◽  
Petroleum Resources ◽  
Carbon Dioxide Co2

Due to the ever-reducing conventional petroleum resources, considerable research on renewable energy sources such as biodiesel as a possible “greener” substitute fuel for internal combustion engines is needed. This study aims to compare the engine performance and emission results of various blends of pure diesel and a multi-feedstock (MFS) biodiesel when used in a naturally aspirated air-cooled, single-cylinder direct injection diesel engine. The engine was coupled to a dynamometer for torque measurement and output data transmitted to a PC for post-processing and displayed using customized programs in the computer. Engine combustion products — Nitrogen Oxide emissions (NOx), Hydrocarbons (HCs), Carbon monoxide (CO) and Carbon dioxide (CO2) — were measured and are presented alongside performance properties including brake-specific fuel consumption (BSFC), engine efficiency, torque and power. The experimental results show that, relative to diesel, biodiesel had approximately 3–24% decrease in torque, 4–11% decrease in power, 11–32% increase in BSFC and 8–29% general reduction in engine efficiency. However, biodiesel reduced the emissions of CO (1.5–6%), CO2 (13–34%) and unburned HCs (3–25%), while NOx emissions were increased significantly (12–48%). These results indicate that smaller percentages of biodiesel (20% or less) could be blended with pure diesel and used in a diesel engine, without any engine modifications, as an alternative and environmentally friendly fuel and without significantly compromising engine performance.

scholarly journals Acetylene an Potential Alternative Fuel for Stationary Diesel Engine

2019 ◽  
Vol 8 (2) ◽  
pp. 5013-5016
Keyword(s):  
Diesel Engine ◽  
Alternative Fuels ◽  
Internal Combustion Engines ◽  
Direct Injection ◽  
Load Condition ◽  
Maximum Load ◽  
Constant Speed ◽  
Dual Fuel ◽  
Auto Ignition ◽  
Di Diesel Engine

The present study focuses on incorporation of alternative fuels along with existing internal combustion engines (ICE) without making major modifications. Acetylene has good combustion qualities with auto ignition temperature of 3050C. To increase the use of acetylene as non-petroleum gas in ICE, we carried experimentation on a single cylinder constant speed diesel engine. In this study, direct injection (DI) and constant speed compression ignition (CI) engine tested with pure diesel and diesel-acetylene dual fuel mode. We conducted experiments to study the performance characteristics of DI diesel engine in dual fuel mode by aspirating acetylene gas in the inlet manifold with a flow rate of 2 liters/minute (lpm) of acetylene. Observation recorded that, during idling condition to get the same power output when aspirated with the 2 lpm acetylene, 3.5% less amount of diesel required. For maximum load 9% less amount of diesel required. And 12% less amount of diesel required during partial loading condition. Also, the performance shows increased trend in indicated power and brake power by 1-2%. It was also observed that use of acetylene gas has more influence on emission of CO2. Emission results showed that without a catalytic convertor, 8% decreased amount of CO2 released during idling condition. Similar emission results of engine found during full load condition when acetylene used along with diesel, supporting the health of environment for reduction of global warming.

Improvement Of Engine Performance Using Diethylene Glycol Dimethyl Ether (DGM) As Additive

2012 ◽  
Author(s):  
Md. Nurun Nabi ◽  
Md. Wahid Chowdhury
Keyword(s):  
Diesel Engine ◽  
Oxygen Content ◽  
Diesel Fuel ◽  
Direct Injection ◽  
Research Work ◽  
Specific Energy Consumption ◽  
Load Condition ◽  
Engine Performance ◽  
Exhaust Emissions ◽  
Diesel Emissions

This research work investigates diesel combustion and exhaust emissions with additives addition to conventional diesel fuel in a four-stroke naturally aspirated direct injection (DI) diesel engine. The additives include DGM, and liquid cerium. The results show that with the addition of DGM to diesel fuel, brake specific energy consumption (BSEC) and all diesel emissions are significantly reduced. The volumetric blending ratios of additives to diesel fuel are 0, 25, 50, 75 and 100%. All emissions including smoke emissions decrease with the increase in oxygen content in the fuel and it is noted that smoke emission completely disappeared at an oxygen content of 36 wt–%. The reason for improvement in BSEC with the addition of additives to base diesel fuel is the improvement of degree of constant volume combustion, and the reduction of the cooling loss. Engine noise and odor concentrations are remarkably reduced with diesel-additive blends. Significant improvement in BSEC and exhaust emissions is not only found at medium load condition but also at high load condition. Key words: Diesel engine, DGM, emissions, BSEC, and cooling loss

scholarly journals EFFECT OF OPERATING CONDITIONS ON PERFORMANCE AND EMISSIONS OF A DIESEL ENGINE OPERATED WITH DIESEL-HYDROGEN BLEND

2019 ◽  
Vol 19 (4) ◽  
pp. 337-357
Author(s):  
Haroun A.K. Shahad ◽  
Emad D. Abood
Keyword(s):  
Diesel Engine ◽  
Air Temperature ◽  
Internal Combustion Engines ◽  
Direct Injection ◽  
Heating System ◽  
Operating Conditions ◽  
Pollutant Emissions ◽  
Injection Timing ◽  
Engine Operation ◽  
Performance And Emissions

Hydrogen is a clean fuel for internal combustion engines since it produces only water vapor and nitrogen oxides when it burns. In this research, hydrogen is used as a blending fuel with diesel to reduce pollutants emission and to improve performance. It is inducted in the inlet manifold, of a single cylinder, four stroke, direct injection, water cold diesel engine, type (Kirloskar). Hydrogen blending is done on energy replacement basis. A special electronic unit is designed and fabricated to control hydrogen blending ratio. The maximum achieved ratio is 30% of input energy and beyond that engine operation becomes unsatisfactory when the air temperature is 20 oC and injection timing of -35o CA which represent the first part of this work. Inlet air heating system is built and added in the experimental work. The heating system allows to increase the air temperature up to 100 oC. A heating of air to 60 oC with injection timing of -30o CA and 55% of hydrogen blending is executed in the second part of this study. Tests are done with 17.5 compression ratio and 1500 rpm. The brake specific fuel consumption is reduced by 29% and 46%, the engine thermal efficiency is increased with 16% and 21% for the 1st and 2nd part respectively. The pollutant emissions of carbon oxides, UHC, and smoke opacity are dramatically decreased by 19.5%, 13%, and 45% respectively for the 1st part and 41%, 38% and 65.6% for the 2nd part while NOx emission is increased by 10% and 25% for the 1st and 2nd part respectively.

An Intake System Optimization of a Heavy Duty DI Diesel Engine Using CFD Analysis

2015 ◽  
Author(s):  
Kareem Emara ◽  
Ahmed Emara ◽  
Elsayed Abdel Razek
Keyword(s):  
Diesel Engine ◽  
Optimal Design ◽  
Internal Combustion Engines ◽  
Direct Injection ◽  
Engine Performance ◽  
System Optimization ◽  
Intake Manifold ◽  
Heavy Duty ◽  
Intake System ◽  
Di Diesel Engine

As the intake system design is significant for the optimal performance of internal combustion engines, this work aims to optimize the geometry of an intake system in a direct injection (DI) diesel engine. The study concerns the geometry effects of three different intake manifolds mounted consecutively on a fully instrumented, six cylinders, in line, water cooled, 19.1 liters displacement, DI heavy duty diesel engine. A 3D numerical simulation of the turbulent flow through these manifolds is applied. The model is based on solving Navier-Stokes and energy equations in conjunction with the standard K-ε turbulence model and hypothetical boundary conditions using ANSYS- CFX 15. Numerical results of this simulation are presented in the form of flow field velocity as well as pressure field. Optimal design of the intake system is performed and the modeling made it possible to provide a fine knowledge of in-flow structures, in order to examine the adequate manifold. Engine performance characteristics such as brake torque, brake power, thermal efficiency and specific fuel consumption are also carried out to evaluate the effects of the variation in the intake manifold geometry and to validate the optimal design. Simulation and experimental results confirmed the effectiveness of the optimized manifold geometry on the engine performances.

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