Articles

  1. INVESTIGATION ON EDM PROCESS PARAMETERS OF AUSTENITIC STEELDownload Article

    CH.Sravya, Vijayanand Pedamuthevi, P Sreenivasan, M. Sharanya Teja

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    Electrical Discharge Machining (EDM) is a controlled metal-removal process that is used to remove metal by means of electric spark erosion. In this process an electric spark is used as the cutting tool to cut (erode) the work piece to produce the finished part to the desired shape. The metal-removal process is performed by applying a pulsating (ON/OFF) electrical charge of high-frequency current through the electrode to the work piece. This removes (erodes) very tiny pieces of metal from the work piece at a controlled rate. Wire and vertical EDM machines are equipped with a servo control mechanism that automatically maintains a constant gap of about the thickness of a human hair between the electrode and the work piece. In EDM various techniques are applied to improve the material removal rate (MRR), surface roughness (SR) and tool wear rate (TWR) with different electrode combination. However, the machining parameters are also effective while machining. In this study, an experiment is performed to analyze the effect of machining parameters viz. discharge current (Ip), pulse on time (Ton), voltage (v) over the responses of MRR and SR. For this Tungsten carbide tool or electrode used while the work piece chosen as Austenitic stainless steel which is utilized for manufacturing of various products in our daily life. For the conduction of experiments L9 orthogonal array was used to complete the runs.

  2. EFFECT OF FUEL INJECTION PRESSURE ON COMBUSTION CHARACTERISTICS OF CI ENGINE USING ALTERNATIVE FUELSDownload Article

    Koppula Anusha, Vijayanand Pedamuthevi, M. Sharanya Teja

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    The depletion, increasing demand and price of the petroleum promoted extensive research worldwide on alternative energy resources for internal combustion engines. There were several studies which reveal the significance of research on biodiesel as a substitute fuel to a diesel fuel. It has proven that biodiesel is one of the promising renewable, alternative and environmentally friendly bio fuels that can be used in diesel engine with little or no modification in the engine. The stringent emission laws, depletion of fossil fuels and relation of fuels with government policies have forced the world to find alternatives to fossil fuels. Numerous vegetable oils suitability has been investigated for use in internal combustion engines. The effects of different fuels on the performance characteristics of engines have been extensively reported. The high viscosity and low volatility of these vegetables oils are the major problem for their use in the diesel engines. However use of different biodiesels in an engine results in variability in the engine performance and emission due to physical and chemical characteristics of fuel. The effect of these physio-chemical properties on fuel supply system such as fuel pump and fuel filter have already been reported. In this work an experiment is made to improve the combustion characteristics of the engine fueled with biodiesel (Palm Stearin Methyl Ester & Animal Tallow methyl Easter). Hence a detailed investigation is carried out on the underlying combustion and heat release characteristics. The experimental work is conducted on 4S, single cylinder, water cooled and DI stationary diesel engine. In this work Bsfc (Brake specific fuel consumption) and thermal efficiency are computed, for different in cylinder pressure and peak heat release rate.

  3. CHARACTERISATION OF NON-FERROUS METALS OVER MILD STEEL USING FRICTION SURFACE PROCESSDownload Article

    P Ramya, Vijayanand Pedamuthevi, Sardar Jaspal Singh

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    According to the present demand for surface engineering technique over the metals in the present industrial application we introduced friction surfacing process. In this process the coating over different metals will takes place by using friction between two metals. It has certain advantages like wear and corrosion resistance, working life times, friction energy losses etc… This process has been for obtaining various hard metal coatings, such as aluminum coatings on mild steel. Friction surfacing process is not only cheaper but also reliable and the properties of the base metal will remain constant after coating. The coating over the metal will take place at recrystalisation temperature of the parent metal only. So that the base metal will not melt as the structure and properties of the base metal will remain constant. The main concept of this project is to know the interface properties of the non-ferrous metals after coating over the ferrous metals by using this friction surfacing process. The effects of process parameters, interfacial bond characteristics and mechanical properties of coatings are studied. Metallurgical studies were made using optical microscopy; mechanical tests included bend tests and micro hardness tests.

  4. DESIGN AND ANALYSIS OF EFFICIENT HEAT RECOVERY SYSTEM BY REPLACING AIR CONDENSER WITH WATER CONDENSERDownload Article

    P. Sri Harsha Mitra, Vijayanand Pedamuthevi, P Sreenivasan

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    In the last three decades, the world has experienced enormous increases in energy and fuel consumption of a consequence of economic and population growth. Hence renewable energy and energy recovery are the best option. the present work deals about applying of water heat recovery to refrigeration cycles. This project is about to effective recovery of waste heat from the condenser in the refrigeration system by replacing the air condenser with water condenser. (I.e. replacing of condenser blower with hot water heat exchanger) and in this project condenser of air conditioning system will be placed in box which completely filled with water. when refrigerant(R134a) comes out from the compressor the temperature of refrigerant is high about to 51ºc when boiling point of refrigerant is low about to -29 ºc the high temperature refrigerant will passes through the hot water heat exchanger the heat will passes through the conduction processes and the water get heated . And water temperature increased from 30ºc to nearly 45 ºc. And they obtained hot water is utilized to domestic use and as well as control on industrial application such as RH controls and chemical processes and utilized for all hot water needs for industrial and as well as home applications. And also efficiency of condenser increases and hence efficiency of a refrigeration cycle increases it indicates efficiency of the air conditioning system increases.

  5. OPTIMIZATION OF PROCESS PARAMETERS IN WEDM BY GRA TECHNIQUE FOR MACHINING ALUMINIUM HE15WPDownload Article

    M.Murali Manohar, P Sreenivasan, M Sharanya Teja

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    In recent days as the demand of Super alloys are increasing, there is a need of machining these materials with optimum conditions, so that it can be used in industries. The present work includes selection of process parameters while machining aluminum HE15WP alloy in WEDM, understanding the parameter which influences more on output responses such as MRR, Surface roughness. Then the Optimum input parameters have been decided by GRA technique. First of all the range of input parameters are decided by the help of several trial experiments. Then the experiments are designed by the help of Taguchi’s orthogonal array technique which has suggested the number of experiments to be performed. After that, the experiments are carried out with the material mentioned. Then output responses (surface roughness, MRR, Hardness) for different experimental setups are measured. After getting these output responses ANOVA analysis is done by help of the design expert software to find out the influences of process parameters on the responses. Finally GRA analysis is applied to find out the optimum process parameters for machining ALUMINIUM HE15WP for getting better MRR, Surface finish, Hardness.

  6. FRICTION STIR WELDING ON DISSIMILAR MATERIAL BY DIFFERENT TOOL GEOMETRYDownload Article

    MD.Yakub Ali, P Sreenivasan, M Sharanya Teja

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    Friction stir welding (FSW), a solid-state joining technique, is being extensively used in similar as well as dissimilar joining of Al, Mg, Cu, Ti, and their alloys. In the present study. Dissimilar metal welding has been identified as a top priority in materials joining technologies recently such as welding magnesium to aluminium or steel to reduce weight. Friction stir welding for joining dissimilar metals. Magnesium to Aluminium FSW has been investigated frequently but has basic issue of now the position of Al and Mg with respect to the welding tool effect the joint strength is still not understand. The effect of welding parameters on mechanical poperties of aluminium alloy AA6061 and AA2014 H14 Friction stir welding joints were investigate in this experiment. Different welded specimen were produced by different tool and constant rotational speed and variable weld speed. In present work FSW of Aluminium alloys AA6061-AA2014 carrying at different tool, constant rotational speed and weld speed. After conducting the above experiment. I am going to conduct various test like micro structure analysis, mechanical properties.

  7. CALCULATE MRR AND SURFACE ROUGHNESS VALUES WITH DIFFERENT PARAMETERS BY TURNING PROCESS USING TAGUCHI METHODDownload Article

    J.Rakesh, P Sreenivasan, M Sharanya Teja

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    Turning process is one of the most fundamental machining processes used in the manufacturing industry. The process of turning is influenced by many factors such as cutting velocity, feed rate, depth of cut, geometry of cutting tool, and cutting conditions etc., to name a few. In machining operations, achieving the desired surface quality of the machined product is really a challenging job. This is due to the fact that quality is highly influenced by process parameters directly or indirectly. However, the extent of significant influence of the process parameters is different for different responses. In this work the effect of insert nose radius and machining parameters including cutting speed, feed rate and depth of cut on surface roughness and material removal rate (mrr) in a turning operation are investigated by using the Taguchi optimization method.3D modeling done by pro engineer parametric software. Analysis is done by Ansys.

  8. PERFORMANCE AND HEAT RATE ANALYSIS OF STEAM TURBINESDownload Article

    Gunduboina Saikishore, K.Sreenivasulu, G.Satish Kumar

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    The development of country depends on the amount of power production. Thermal power plant plays a major role in power production. In thermal power plant steam turbine is one of the essential components and it produces rotational work which is important for production. Limited primary energy resources and awareness of environmental pollution has led to ever increasing endeavor to develop new steam turbine power plants with the highest possible efficiencies. Even small step increase in efficiency can result in major saving for the customer. As overall cycle efficiency is strongly dependent on steam turbine performance the efforts are directed primarily towards improvement in reducing the losses.The main objective of our project is to calculate the heat rate and performance of steam turbine and analyse the effects of “radial clearance” and “reheat spray”.

  9. IoT – Research Issues and ChallengesDownload Article

    M.Beemajan Shaheen, M.Ramu

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    With the Internet of Things (IoT) being a new research area, the work that is going on worldwide in this field is disjoint. The picture is not clear on who is doing what and where, thus making it difficult not only for newcomers into this field to define their space and also engage with potential collaboration partners, but also for the relatively established researchers as well to gain the necessary support in their work. There is a massive increase in the amount of data that is generated globally. This data is traditionally generated by a number of different autonomous devices. There are many problems in security of Internet of Things (IOT) crying out for solutions, such as RFID tag security, wireless security, network transmission security, privacy protection, information processing security. This article is based on the existing researches of network security technology. In the future, hundreds of billions of smart sensors and devices will interact with one another without human intervention, on a Machine-to-Machine (M2M) basis. They will generate an enormous amount of data at an unprecedented scale and resolution, providing humans with information and control of events and objects even in remote physical environments. This paper will provide an overview of issues and challenges existing by this new exemplar.

  10. Operative Key Management in Vibrant Wireless Sensor Networks using AppATP - A SurveyDownload Article

    M.Ramu, M.Beemajan Shaheen

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    Wireless sensor networks (WSNs) have been deployed for a wide variety of applications, including patient status monitoring, traffic flow monitoring, and military sensing and tracking, where sensory devices often move between different locations. Securing data and communications requires suitable encryption key protocols. In this paper, we propose a certificate less-effective key management (CL-EKM) protocol for secure communication in vibrant WSNs characterized by node mobility. The CL-EKM supports efficient key updates when a node leaves or joins a cluster and ensures forward and backward key secrecy. We design and implement an application-layer transmission protocol, AppATP, which leverages cloud computing to manage data transmissions for mobile apps, transferring data to and from mobile devices in an energy efficient manner. Measurements show that significantly amount of energy is consumed by mobile devices during poor connectivity. AppATP adaptively seizes periods of good bandwidth condition to prefetch frequently used data with minimum energy consumption, while deferring delay-tolerant data during poor network connectivity. Using the stochastic control framework, AppATP only relies on the current network information and data queue sizes to make an online decision on transmission scheduling, and performs well under unpredictable wireless network conditions.

  11. FRAGMENTS SIGNATURE AND TRUST REGISTER TECHNIQUE FOR DETECTION OF JAMMERS IN WIRELESS SENSOR NETWORKSDownload Article

    S.Sathishkumar, Dr.C.Senthil Singh

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    Wireless networks, the dominant and successful networks of today, defined a flexible approach of providing service to the nodes anywhere and anytime. Either autonomous or client machines are distributed specially to perform its prescribed functions by the base station. The data collected from the environment, considered to be of sensitive importance, have to be ensured to reach the right end. When deciding a framework of the wireless networks, a number of concerns have to be concentrated. Traffic of the data packets, congestion control, and prevention from attacks of any kind, detection and tracing back of attackers will be the prioritized actions. Denial of Service attacks, an attempt to degrade the network's resources such as bandwidth and memory, target a single machine to prevent it from getting or sending the data to the base station. The paper introduces a novel approach to monitor, communicate and determine if there is any attack within the networks. The proposed protocol will be ensuring the confidentiality by enabling a three times check for the originality of data packets. When the system doubts a data packet, signatures are checked in three registers, one from the sender, intermediate and the destined node. Any packet without these signatures will be regarded as an attack packet. The advantage of this method is to counter a low profile DoS attacks, which has evolved into a new type of attack for minimal evidence of an attack. Keywords: Jamming, Detection, Signature, TRUST Register

  12. DETECTION OF DDoS ATTACKS BY SIGNATURE GENERATION WITH PATH AND PATTERN METRICSDownload Article

    Manojkumar K, Dr.C.Senthil Singh

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    Wireless networks, the dominant and successful networks of today, defined a flexible approach of providing service to the nodes anywhere and anytime. Either autonomous or client machines are distributed spatially to perform its prescribed functions by the base station. The data collected from the environment, considered to be of sensitive importance, have to be ensured to reach the right end. When deciding a framework of the wireless networks, a number of concerns have to be concentrated. Traffic of the data packets, congestion control, and prevention from attacks of any kind, detection and tracing back of attackers will be the prioritized actions. Denial of Service attacks, an attempt to degrade the network's resources such as bandwidth and memory, target a single machine to prevent it from getting or sending the data to the base station. The paper introduces a novel approach to monitor, communicate and determine if there is any attack within the networks. The proposed protocol will be ensuring the confidentiality by enabling a three times check for the originality of data packets. When the system doubts a data packet, signatures are checked in three registers, one from the sender, intermediate and the destined node. Any packet without these signatures will be regarded as an attack packet. The advantage of this method is to counter a low profile DoS attacks, which has evolved into a new type of attack for minimal evidence of an attack.

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