3-D Modeling and Rapid Prototyping of a Cryogenic Liquefier

Bishoyee, N (2010) 3-D Modeling and Rapid Prototyping of a Cryogenic Liquefier. BTech thesis.

PDF 1356Kb

Abstract

Our country is still dependent on imports for most of its needs in cryogenic refrigerators and liquefiers. These products are proprietary in nature which makes it very expensive for its cost and maintenance. With support from the Department of Atomic Energy, our institute has initiated a program on development and study of a nitrogen liquefier of intermediate capacity in the range of 10-50 liters/hr by using technologies already developed in our country. The process is based on a suitable modified Claude cycle which minimizes the number of heat exchangers and also takes care to accommodate the in house developed turbo expander. The thermodynamic parameters (temperature, pressure, pinch point temperature) and rate of mass flow are evaluated to obtain the required designing specifications for each component. The main objective of this report is to model all the components that are to be placed inside the vessel using CAD software and make an assembly so that all the components are placed properly inside the vessel and then connect pipes between components according to the design specifications.

Item Type:	Thesis (BTech)
Uncontrolled Keywords:	rapid prototyping,liquefier,modeling
Subjects:	Engineering and Technology > Mechanical Engineering > Cryogenics
Divisions:	Engineering and Technology > Department of Mechanical Engineering
ID Code:	1736
Deposited By:	Nikhilesh Bishoyee
Deposited On:	14 May 2010 12:41
Last Modified:	14 May 2010 12:41
Related URLs:	Dspace
Supervisor(s):	Sarangi, S K

Axisymmetric Stress Analysis of Internally Pressurized Rotating Cylinder using Finite Element Method

Bhagat, Meghraj Vitthal (2010) Axisymmetric Stress Analysis of Internally Pressurized Rotating Cylinder using Finite Element Method. BTech thesis.

PDF 939Kb

Abstract

The present paper is devoted to stress analysis of a homogenous, orthotropic, internally pressurized rotating cylinder. Assuming the cylinder in plain strain condition and that the volume remains constant, finite element method is used to find out the stresses and displacement at each node of isoparametric elements (Bilinear and Quadratic). FEM results are then compared with the exact values, comparison is also done between different element numbers ( for same element type ) and between different element types ( for same element number).
The reason for doing the comparison is to find out by how much the FEM results vary from the exact solution and to see how the FEM results converge to exact values by increasing the element number. Comparison also gives the brief idea about the two elements i.e which of the two elements gives better results for the same element number.

Item Type:	Thesis (BTech)
Uncontrolled Keywords:	Axisymmetric, thick cylinder, FEM, isoparametric, bilinear element, quadratic element, matlab.
Subjects:	Engineering and Technology > Mechanical Engineering > Finite Element Analysis Engineering and Technology > Mechanical Engineering > Structural Analysis
Divisions:	Engineering and Technology > Department of Mechanical Engineering
ID Code:	1822
Deposited By:	Mr. Meghraj Bhagat
Deposited On:	18 May 2010 16:53
Last Modified:	18 May 2010 16:53
Related URLs:	Dspace
Supervisor(s):	Kavi, N

Vibration Analysis of a Beam using Neural Network Technique

Behera, P S (2010) Vibration Analysis of a Beam using Neural Network Technique. BTech thesis.

PDF 1025Kb

Abstract

Using changes in global dynamic characteristics for detection of cracks has been a hot research topic now a days and is a source of attraction for civil, aerospace, and mechanical engineering communities in recent years. Crack in vibrating components causes a change in physical properties of a structure which in turn affects dynamic response characteristics. Therefore we have to study the dynamic response characteristics in order to avoid any catastrophic failures and to follow structural integrity and performance for which the parameters considered are crack depth and its location.
In the present study, vibration analysis is carried out on a cantilever beam with two open transverse cracks, to study the response characteristics. Its natural frequency and mode shapes are determined by applying suitable boundary conditions. The results obtained numerically are compared with the results obtained from the simulation. The simulations have done with the help of ALGOR software.
Then by using Feed-forward, back propagation neural network the relationship between the location and the depth of the crack as input and the structural eigenfrequencies as output are studied.
At the end by performing both the simulation and computational analysis it is proved that the presence of cracks affects the natural frequency and the mode shapes of the structure. The results indicate that the current approach can identify both the location and the extent of damages in the beam.

Item Type:	Thesis (BTech)
Uncontrolled Keywords:	Crack,beam,vibration,algor,neural network,eigen frequencies,feed-forward, back propagation neural network
Subjects:	Engineering and Technology > Mechanical Engineering > Finite Element Analysis Engineering and Technology > Mechanical Engineering > Machine Design Engineering and Technology > Mechanical Engineering > Structural Analysis
Divisions:	Engineering and Technology > Department of Mechanical Engineering
ID Code:	1967
Deposited By:	Parthasarathi Behera
Deposited On:	24 May 2010 12:26
Last Modified:	15 Jun 2012 09:44
Related URLs:	Dspace
Supervisor(s):	Behera , R K

Study on Mechanical Behavior of Polymer based Composites with and without Wood Dust Filler

Behera, S (2010) Study on Mechanical Behavior of Polymer based Composites with and without Wood Dust Filler. BTech thesis.

PDF 4Mb

Abstract

Particulate fillers are of considerable interest, not only from an economic viewpoint, but as modifiers especially the physical properties of the polymer. A notable advance in the polymer industry has been the use of fiber and particulate fillers as reinforcements in polymer matrix. Over the last few decades, the considerable attention has been devoted towards wood dust filled polymer composites due to its many advantages. These include mainly the improved nvironmental performance, due to the use of biodegradable materials and the reduction in the use of non-renewable (oil based) resources throughout the whole life cycle of the composite; the low cost of wood flour; the lower specific weight of these fillers, in comparison to the traditional mineral-inorganic ones; the improvement in safety for the production employees and the special aesthetic properties of the composites. Although there are several reports in the literature which discuss the mechanical behavior of wood/polymer composites, however, very limited work has been done on effect of wood dust fillers on mechanical behavior glass fiber based polymer composites. Against this background, the present research work has been undertaken, with an objective to explore the potential utilization of wood dust filler as a reinforcing material in polymer composites and to investigate its effect on the mechanical behaviour of the resulting composites. Finally, the SEM analysis has been made on fractured surfaces of composites after different tests.

Item Type:	Thesis (BTech)
Uncontrolled Keywords:	polymer based composites, wood dust filler
Subjects:	Engineering and Technology > Mechanical Engineering Engineering and Technology > Mechanical Engineering > Production Engineering
Divisions:	Engineering and Technology > Department of Mechanical Engineering
ID Code:	1796
Deposited By:	SANJAYA KUMAR BEHERA
Deposited On:	14 May 2010 15:30
Last Modified:	14 May 2010 15:30
Related URLs:	Dspace
Supervisor(s):	Biswas, S

Design and Fabrication of a Gear Box Motor Current Analysis System

Baruah, Madhurya and Rakshin, H A (2010) Design and Fabrication of a Gear Box Motor Current Analysis System. BTech thesis.

PDF 3398Kb

Abstract

To achieve reliable and cost effective diagnosis, Motor current signature analysis is used to investigate the use of an induction motor as a transducer to indicate the faults in multistage gearbox via analyzing supply parameters such as phase current and instantaneous power.
In gearboxes, load fluctuations on the gearbox and gear defects are two major sources of vibration. Further at times, measurement of vibration in the gearbox is not easy because of the inaccessibility in mounting the vibration transducers. This analysis system can be used for measuring the characteristics for a perfectly working gearbox and use the data as a standard for measuring faults and defects in other gearboxes. The objective of this paper is to design and fabricate a gearbox motor current analysis system at different gear operations for a constant load. Steady load conditions on the gearbox are tested for current signatures during different gear operations.
The motor current analysis system can be used further to specify mainly faults in the gear, misalignment of meshed gears, and loss of contact of the gears.

Item Type:	Thesis (BTech)
Uncontrolled Keywords:	Motor current signature analysis (MCSA), Vibration,gearbox, variable frequency drive (VFD)
Subjects:	Engineering and Technology > Mechanical Engineering > Automobile Engineering Engineering and Technology > Mechanical Engineering > Machine Design
Divisions:	Engineering and Technology > Department of Mechanical Engineering
ID Code:	1884
Deposited By:	Mr Madhurya Baruah madhurya
Deposited On:	19 May 2010 12:03
Last Modified:	19 May 2010 12:03
Related URLs:	Dspace
Supervisor(s):	Mohanty, S C

Study on the performance and Emission characteristics using castor and mustard seed oil mixture and diesel blend in C.I Engine

Behera, Debiprasad (2010) Study on the performance and Emission characteristics using castor and mustard seed oil mixture and diesel blend in C.I Engine. BTech thesis.

PDF 474Kb

Abstract

Bio-diesel is one of the most promising alternatives for diesel needs..The present work has focused on the performance of castor non-edible vegetable oil and Mustard oil edible vegetable oil and its blend with diesel on a double cylinder, 4 stroke, naturally aspirated, direct injection, water cooled, eddy current dynamometer Kirloskar Diesel Engine at 1500 rpm for variable loads. Initially, castor eat oil and their blends were chosen. The physical and chemical properties of Castor oil, Mustard oil and its blend were determined. In general, viscosity of neat vegetable oil is high, which can be reduced through blending with diesel and heating them. The performance and emission characteristics of engine are determined using Castor and Mustard oil and their blends with diesel. These results are compared to those of pure diesel. Byanalyzing the graphs, it was observed that the performance characteristics are reduced and emission characteristics are increased at the rated load compared to those of diesel. This is mainly due to lower calorific value, high viscosity and delayed combustion process. From the critical analysis of graphs, it can be observed that 10% of Castor oil and Mustard oil mixture mixed with 90% of diesel is the best suited blend for Diesel engine without eating and without any engine modifications. It is concluded that castor and Mustard oil can be used as an alternate to diesel.

Item Type:	Thesis (BTech)
Uncontrolled Keywords:	Brake Power, Thermal Efficiency, Exhaust Gas temperature
Subjects:	Engineering and Technology > Mechanical Engineering > Automobile Engineering
Divisions:	Engineering and Technology > Department of Mechanical Engineering
ID Code:	1861
Deposited By:	Mr. Debiprasad Behera
Deposited On:	19 May 2010 10:59
Last Modified:	19 May 2010 10:59
Related URLs:	Dspace
Supervisor(s):	Murugan, S

Economic Design of Control Chart

Anand Amrit , Raj (2010) Economic Design of Control Chart. BTech thesis.

PDF 242Kb

Abstract

Control chart are widely used to establish and maintain statistical control of a process.In other words it is a tool used to monitor processes and to assure that they remain "In Control" or stable The vital function of control chart is to find out the occurrence of assignable causes so that the necessary corrective action can be taken before a huge amount of defective product is produced. The X-bar control chart is preferred most in comparison to any other control chart technique if quality is measured on a regular
scale. In the present project, we here develop the economic design of the X-bar control chart using Genetic Algorithm to determine the values of the sample size, sampling interval, width of control limits such that the expected total cost per hour is minimized. The genetic algorithms (GA) are applied to search for the optimal values of the three test parameters of the X-bar chart. In genetic algorithm we use mutation and cross-over technique to get the optimal solution. Finally, a sensitivity analysis will be carried out to investigate the effect of model parameters on the solution of the economic design

Item Type:	Thesis (BTech)
Uncontrolled Keywords:	Control chart,GeneticAlgorithm,CYCLE OF EVOLUTION
Subjects:	Engineering and Technology > Mechanical Engineering > Production Engineering
Divisions:	Engineering and Technology > Department of Mechanical Engineering
ID Code:	1924
Deposited By:	ANAND AMRIT RAJ
Deposited On:	19 May 2010 17:08
Last Modified:	19 May 2010 17:08
Related URLs:	Dspace
Supervisor(s):	Patel, S K

Joining of Dissimilar Materials using:Yag Laser Welding

Barik, A K (2010) Joining of Dissimilar Materials using:Yag Laser Welding. BTech thesis.

PDF 12Mb

Abstract

The combination of mild steel and stainless steel as a welded joint has very important applications in industry. In this project, laser welding of mild steel to stainless steel was studied at different values of beam energy and welding speed, keeping beam diameter constant. A 9 kW ALPHALASER AL200 Nd:YAG laser was used to weld 1.5 mm thick mild steel and stainless steel plates. The photographs of the welded seams were observed and tensile testing of specimens was done to evaluate the mechanical properties of the welded joint. The peak load at which each specimen broke was found out. Results indicated that with an increase in values of both welding speed as well as beam energy, the peak load first increased gradually, attained a maximum, and then decreased. Equations were found out to depict the relation between (i) peak load and beam energy and (ii) peak load and welding speed.

Item Type:	Thesis (BTech)
Uncontrolled Keywords:	laser, welding, Nd:YAG, dissimilar
Subjects:	Engineering and Technology > Mechanical Engineering > Production Engineering
Divisions:	Engineering and Technology > Department of Mechanical Engineering
ID Code:	1799
Deposited By:	Amit Kumar Barik
Deposited On:	14 May 2010 16:51
Last Modified:	14 May 2010 16:51
Related URLs:	Dspace
Supervisor(s):	Sahoo, S K

CFD Modelling of a flat plate

AD, Thirumuruga and Das, Paramita (2010) CFD Modelling of a flat plate. BTech thesis.

PDF 2107Kb

Abstract

Performance of an aircraft wing depends on the smoothness of the air flow over it. Any accumulation of frost, snow or ice on the wings or other horizontal surfaces will substantially alter the lifting characteristics of the airfoil and also changes the values of aerodynamic forces exerted on the airfoil. So any small change in flow parameters could affect its performance in a larger scale. This can sometimes be disastrous too. The wings of the airplane are also susceptible to corrosion also due to the excess humidity level. When it comes to large airfoils like aircraft wings, these parameters have to be maintained perfect so that the probability of failure is minimized. The basic test surface for investigating the effects of various parameters to the underlying boundary layer is the universal flat plate. Therefore a flat plate is used for this study.
The present paper concentrates on analyzing various flow parameters of cold air while it flows over a flat plate. Modeling and analysis of the flow were performed using FLUENT, version 6.3. The results obtained are purely the simulation software based calculations.

Item Type:	Thesis (BTech)
Uncontrolled Keywords:	CFD modelling, Flat plate
Subjects:	Engineering and Technology > Mechanical Engineering > Computational Fluid Dynamics
Divisions:	Engineering and Technology > Department of Mechanical Engineering
ID Code:	1901
Deposited By:	THIRUMURUGA AD
Deposited On:	19 May 2010 16:11
Last Modified:	18 Jul 2012 16:27
Related URLs:	Dspace
Supervisor(s):	Murugan, S

Optimization of Process Parameters of Micro Wire EDM

Agarwal, Ricky (2010) Optimization of Process Parameters of Micro Wire EDM. BTech thesis.

PDF 731Kb

Abstract

Wire electrical discharge machining process is a highly complex , time varying & stochastic process. The process output is affected by large no of input variables. Therefore a suitable selection of input variables for the wire electrical discharge machining (WEDM) process relies heavily on the operator‟s technology & experience because of their numerous & diverse range. WEDM is extensively used in machining of conductive materials when precision is of prime importance. Rough cutting operation in wire EDM is treated as challenging one because improvement of more than one performance measures viz. Metal removal rate(MRR), surface finish & cutting width (kerf) are sought to obtain precision work. In this paper an approach to determine parameters setting is proposed. Using taguchi‟s parameter design , significant machining parameters affecting the performance measures are identified as pulse peak current , pulse on time, and duty factor . The effect of each control factor on the performance measure is studied individually using the plots of signal to noise ratio. The study demonstrates that the WEDM process parameters can be adjusted so as to achieve better metal removal rate, surface finish, electrode wear rate.

Item Type:	Thesis (BTech)
Uncontrolled Keywords:	Micro Wire Edm, Taguchi Method
Subjects:	Engineering and Technology > Mechanical Engineering > Production Engineering
Divisions:	Engineering and Technology > Department of Mechanical Engineering
ID Code:	1937
Deposited By:	agarwal ricky
Deposited On:	19 May 2010 17:34
Last Modified:	19 May 2010 17:34
Related URLs:	Dspace
Supervisor(s):	Maity, K P

Evaluation of Chip Breaker

Tirkey, Nelson (2009) Evaluation of Chip Breaker. BTech thesis.

PDF 779Kb

Abstract

Optimization of machining operations is one of the key requirements of today’s automatic machines. In case of turning, unbroken chips pose a major hindrance during operation and hence appropriate control of the chip shape becomes a very important task for maintaining reliable machining process. The continuous chip generated during turning operation deteriorates the workpiece precision and causes safety hazards for the operator. In particular, effective chip control is necessary for a CNC machine or automatic production system because any failure in chip control can cause the lowering in productivity and the worsening in operation due to frequent stop. Chip control in turning is difficult in the case of mild steel because chips are continuous. Thus the development of a chip breaker for mild steel is an important subject for the automation of turning operations. In this study, the role of different parameters like speed, feed and depth of cut and chip breaker height and width are studied.
Response surface methodology was used to analyze the relationship between several explanatory variables and one or more response variables. The chips obtained were found to have greater thickness at low feed and depth of cut, and gradually decreased as feed and depth of cut increases. From the analysis of chip reduction coefficient ξ, lead to the conclusion that cutting speed and depth of cut are most significant factors along with their higher order terms.

Item Type:	Thesis (BTech)
Uncontrolled Keywords:	Chip breaker, Response surface Methodology,Chip thickness,Chip reduction coefficient
Subjects:	Engineering and Technology > Mechanical Engineering > Production Engineering
Divisions:	Engineering and Technology > Department of Mechanical Engineering
ID Code:	324
Deposited By:	nelson
Deposited On:	13 May 2009 14:42
Last Modified:	13 May 2009 14:42
Related URLs:	Dspace
Supervisor(s):	Biswas, C K

Processing and Characterization of Natural Fiber Reinforced Polymer Composites

Tudu, Prakash (2009) Processing and Characterization of Natural Fiber Reinforced Polymer Composites. BTech thesis.

PDF 649Kb

Abstract

Polymeric materials reinforced with synthetic fibres such as glass, carbon, and aramid provide advantages of high stiffness and strength to weight ratio as compared to
conventional construction materials, i.e. wood, concrete, and steel. Despite these advantages, the widespread use of synthetic fibre-reinforced polymer composite has a
tendency to decline because of their high-initial costs, their use in non-efficient structural forms and most importantly their adverse environmental impact. On the other hand, the increase interest in using natural .bres as reinforcement in plastics to substitute conventional synthetic fibres in some structural applications has become one of the main concerns to study the potential of using natural fibres as reinforcement for polymers. In the light of this, researchers have focused their attention on natural fibre composite (i.e. bio-composites) which are composed of natural or synthetic resins, reinforced with natural fibres. Accordingly, manufacturing of high-performance engineering materials from renewable resources has been pursued by researchers across the world owning to renewable raw materials are environmentally sound and do not cause health problem. The present work includes the processing, characterization of coconut fiber reinforced epoxy composites. . It further outlines a methodology based on Taguchi’s experimental design approach to make a parametric analysis of erosion wear behaviour. The systematic experimentation leads to determination of significant process parameters and material variables that predominantly influence the wear rate.

Item Type:	Thesis (BTech)
Uncontrolled Keywords:	Natural fiber
Subjects:	Engineering and Technology > Metallurgical and Materials Science > Composites > Polymer
Divisions:	Engineering and Technology > Department of Mechanical Engineering
ID Code:	1008
Deposited By:	Prakash Tudu
Deposited On:	15 May 2009 10:58
Last Modified:	13 Jun 2012 17:07
Related URLs:	Dspace
Supervisor(s):	Biswas, S