Refine your search
Collections
Co-Authors
Journals
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Durga Prasad, B.
- Cyclic Variations of Liquid Fuel–Air Mixing in a DISI IC–Engine
Abstract Views :196 |
PDF Views:3
Authors
Affiliations
1 Jawaharlal Nehru Technological University, Anatapur, IN
2 Birla Institute of Technology, Ranchi, IN
3 Department of Mechanical Engineering, JNTUA, Anantapur, IN
1 Jawaharlal Nehru Technological University, Anatapur, IN
2 Birla Institute of Technology, Ranchi, IN
3 Department of Mechanical Engineering, JNTUA, Anantapur, IN
Source
Automation and Autonomous Systems, Vol 4, No 7 (2012), Pagination: 261-266Abstract
Direct injection spark ignition (DISI) engines have a large potential to reduce emissions and specific fuel consumption. One of the most important problems in the design of DISI engines is the cycle-to-cycle variations of theflow, mixing and combustion processes. The Large Eddy Simulation (LES) based analysis is used to characterize the cycle-to-cycle fluctuations of the flow field as well as the mixture preparation in a realistic four-stroke internal combustion engine with variable charge motion system. Based on the analysis of cycle-to-cycle velocity fluctuations of in-cylinder flow, the impact of various fuel spray boundary conditions on injection processes and mixture preparation is pointed out. The joint effect of both cycle-to-cycle velocity fluctuations and variable spray boundary conditions is discussed in terms of mean and standard deviation of relative air–fuel ratio, velocity and mass fraction. Finally a qualitative analysis of the intensity of cyclic fluctuations below the spark plug is provided.Keywords
Large Eddy Simulation (LES), Cyclic Variations, Direct Injection Spark Ignition (DISI), Internal Combustion Engine, Air–Fuel Mixing, Fuel Spray Injection.
- Fabrication and Evaluating the Performance of Small Size Wind Turbine Blades with R21 and R22 Profiles
Abstract Views :227 |
PDF Views:3
Authors
Affiliations
1 Department of Mechanical Engineering, Intell Engineering College, Anantapur, Andhra Pradesh, IN
2 Department of Mechanical Engineering, JNT University College of Engineering, Anantapur, AP, IN
1 Department of Mechanical Engineering, Intell Engineering College, Anantapur, Andhra Pradesh, IN
2 Department of Mechanical Engineering, JNT University College of Engineering, Anantapur, AP, IN
Source
Automation and Autonomous Systems, Vol 3, No 7 (2011), Pagination: 327-330Abstract
Wind energy is a non polluting cost effective renewable energy source. Cost of generating power from wind has come down and at the same time, the demand for small size wind turbines is greatly increasing. In this paper the fabrication and testing the blades for stiffness, blade deflections are analyzed. Wind turbine blades are developed in R21 and R22 profiles using three variations in material compositions like fiber glass polyester resin, fiberglass polyester resin sandwiched with central beam made of UV hard foam and fiberglass with epoxy resin sandwiched with a central beam made of UV hard foam. Experimental results can be compared with FEA results for better blade model identification exclusively for small wind turbine system.Keywords
Small Size Wind Turbine Blades, Material Compositions, Blade Profile.- Preparation and Performance Study of Cottonseed Biodiesel Fuelled in Greaves 4-Stroke Single Cylinder Diesel Engine
Abstract Views :198 |
PDF Views:3
Authors
Affiliations
1 Sri Sai Ram Engineering College, Chennai-44, IN
2 Vel Tech. Dr.RR & Dr.SR Technical University, Chennai-62, IN
3 JNTU College of Engineering, Anantapur, IN
1 Sri Sai Ram Engineering College, Chennai-44, IN
2 Vel Tech. Dr.RR & Dr.SR Technical University, Chennai-62, IN
3 JNTU College of Engineering, Anantapur, IN
Source
Automation and Autonomous Systems, Vol 3, No 3 (2011), Pagination: 139-146Abstract
Three major crisis faced by the world are depletion of fossil fuels, environmental degradation and unavailability of electricity. Thus depleting fossil fuels made the world to think about the alternate fuels. Biodiesel is an alternative fuel for diesel engines that is receiving great attention worldwide. In this investigation, cottonseed oil has been considered as a potential alternate fuel for diesel engines and has been chosen to find out its suitability for use as fuel. Hence, we developed cottonseed oil as an alternate fuel by formulating its properties closer to the conventional diesel oil so that it can be used in the diesel engine without any hardwired modification. The main objective of the present study was to decrease the viscosity of cottonseed oil by trans-esterification process, in the fabricated esterification plant and then blend it with diesel, to evaluate the fuel properties of the trans-esterterified oil (or processed oil) and to study the engine performance of processed oil. The fuel consumption and efficiency was estimated for B5, B10, B15, B20, B40, B100 blends of cottonseed oil and compared with diesel. Trans-esterified cottonseed oil methyl esters behaves like diesel and also works well if B100 is pre-heated and maintained for about 600˚C using a heating element with controller in the fuel tank . The smoke levels of B100 are also considerably lesser than that of diesel.Keywords
Cottonseed Biodeisel, Fuel Properties, Performance and Emission Analysis and Transesterification.- Performance and Emission Study on Methanol Fuelled DI Diesel Engine with Catalytic Coatings
Abstract Views :161 |
PDF Views:3
Authors
Affiliations
1 Mechanical Engineering Department, Sathyabama University, Tamilnadu, IN
2 JNTUA College of Engineering, Anantapur, Andhra Pradesh, IN
3 Udaya School of Engineering, Vellamodi, K.K Dist., Tamilnadu, IN
1 Mechanical Engineering Department, Sathyabama University, Tamilnadu, IN
2 JNTUA College of Engineering, Anantapur, Andhra Pradesh, IN
3 Udaya School of Engineering, Vellamodi, K.K Dist., Tamilnadu, IN
Source
Artificial Intelligent Systems and Machine Learning, Vol 4, No 9 (2012), Pagination: 523-527Abstract
A comprehensive study on the methanol with three coatings has been carried out. A four stroke single cylinder diesel engine was adopted for the experiment. The present study aims to evaluate performance and emission level of methanol fuel with three types of ceramic coatings. In this study, the diesel engine was tested using methanol coated with three types of coatings namely copper, aluminium oxide, chromium oxide respectively. The performance of the engine coated is compared to the performance of engine with methanol fuel. The coating that produced the lowest exhaust temperature was at methanol fuel. The exhaust temperature for copper coating was higher compared to aluminium oxide coating and chromium oxide coating. The brake thermal efficiency for the three coating was not varying significantly but the highest was for copper coated. It was noticed that brake thermal efficiency was thus improved in almost all operation conditions with the methanol fuels. The HC and CO emissions are higher at methanol fuelled with copper coatings. NOx and smoke emission are lower for chromium oxide coating compared to Copper coating and Aluminium oxide coating. Among all coatings, copper coating exhibits better efficiency and lower emission compared to other coatings.Keywords
Di Engine, Methanol, Ceramic Coatings.- Performance Evaluation of Compression Ignition Direct Injection Diesel Engine on Dual Fuel Mode with Mango Oil Methyl Ester Biofuel
Abstract Views :241 |
PDF Views:125
Authors
Affiliations
1 Dept. of Mechanical Engg., Sri Venkateswara College of Engineering, Chennai, IN
2 Dept. of Mechanical Engg., JNTU College of Engineering, Anantapur, Andhra Pradesh, IN
1 Dept. of Mechanical Engg., Sri Venkateswara College of Engineering, Chennai, IN
2 Dept. of Mechanical Engg., JNTU College of Engineering, Anantapur, Andhra Pradesh, IN
Source
International Journal of Vehicle Structures and Systems, Vol 7, No 4 (2015), Pagination: 145-148Abstract
In this study, Mango seed Oil Methyl Esters (MOME) that is produced by base catalyzed transesterification method has been chosen as a bio-fuel. Experiments were conducted with fuels of known cetane number at various loads on a single cylinder, constant speed, air-cooled, four stroke, and direct injection vertical diesel engine with rated power of 4.4 kW. All experiments were conducted at injection pressures 200 bar. For the same engine, the performance, combustion and emission analysis was carried out for various blends(20% and 100%) of MOME, diesel with grain alcohol(ethanol 0.1 pre-mixed ratio) on dual fuel mode. When the engine was operated with 20% of MOME and 0.1 pre-mixed ratio, the brake thermal efficiency was found to be very much closer to the BTE obtained with neat diesel due to more calorific value and more heat release rate during combustion. It is also observed that at this blend, Hydrocarbons (HC), Carbon monoxide (CO) and smoke density emissions were found to be less than that of diesel whereas NOx emissions were slightly more than that of diesel.Keywords
Dual Fuel Engine, Grain Alcohol, Mango Seed Oil Methyl Esters, Compression Ignition Direct Injection Engine.Full Text
- Investigation on the Effect of Diethyl Ether Additive on the Performance of Variable Compression Ratio Diesel Engine
Abstract Views :127 |
PDF Views:0
Authors
Affiliations
1 Department of Mechanical Engineering, N.B.K.R.I.S.T., Vidyanagar, Nellore (Dist), A.P, IN
2 Department of Mechanical Engineering, JNTUA College of Engineering, Anantapur, IN
1 Department of Mechanical Engineering, N.B.K.R.I.S.T., Vidyanagar, Nellore (Dist), A.P, IN
2 Department of Mechanical Engineering, JNTUA College of Engineering, Anantapur, IN
Source
International Journal of Engineering Research, Vol 3, No SP 1 (2014), Pagination: 11-15Abstract
The performance of the diesel engine is increased with the addition of oxygenates to the fuel prior to the combustion. This paper presents the effect of blending of Diethyl ether (DEE) with diesel at various proportions (5%,7.5% and 10%)on the performance of diesel engine. The experimental results indicated that with the increase in the concentration of DEE to diesel increases the brake thermal efficiency, mechanical efficiency and decreases the specific fuel consumption. The performance of diesel engine at different compression ratios (18, 16 and 14) for diesel with 5% DEE blend was also evaluated in this work. The data obtained from experimentation is presented analyzed in this paper.Keywords
Variable Compression, Diethyl Ether, Blends, Diesel.Full Text