Wednesday, October 16, 2013

Fuel efficiency in AWD - System

Fuel efficiency in AWD - System

Abstract :

This degree project has been made in cooperation with engineers working for GM Engineering/Saab Automobile AB in Trollhättan. The given name by Saab for the project is “Fuel efficiency improvements in All Wheel Drive(AWD)-system”. The main tasks of this thesis work were to investigate the size of the power losses in different parts on the propeller shaft, to design a computer program that calculates coordinates and angles on a propeller shaft and to investigate the possibilities to put together a simplified formula that calculates the natural frequencies on a propeller shaft.

The main parts of this report are a compilation of the theory about AWD and mostly about the parts on the propeller shaft, and also a description of the developed computer program called Propeller Shaft Calculator. This report doesn’t concern power losses in the different joints because there were no such general equations to be found. The most common way to calculate the power losses inside a joint is to do tests were the power loss is measured at different angles, torque and speed and then use that data to put together an approximated equation.
Most of the work on this project has been on theory studies and on programming.

Simulation Of Thermal Stresses In a Disc Brake


Simulation Of Thermal Stresses In a Disc Brake

Abstract :

The heat flux produced from the friction between a disc and pad system leads to a high temperature which causes thermal stresses in the disc and after a number of repeated braking cycles, cracks might be initiated. The finite element analysis (FEA) is performed to determine the temperatures profile in the disc and to analyze the stresses for the repeated braking, which could be used to calculate the fatigue life of a disc.

Sequentially coupled approach is used for thermo-mechanical problem and the problem is divided into two parts, heat analysis and thermal stress analysis. The heat analysis is obtained by including frictional heat and adopting an Eulerian approach. The heat analysis is conducted by using Abaqus and the toolbox developed by Niclas Strömberg. The thermal stress analysis, which is the main focus of this thesis, is followed using Abaqus. The plasticity theory as background for stress analysis is discussed in detail. The rate independent elasto-plastic plasticity is used in the stress analysis. Temperature independent material properties are considered throughout the thesis work.

Isotropic, kinematic and combined hardening models are analyzed for simple 2D academic models for different types of cyclic loads. A benchmark disc and pad model, which is less complicated than the real disc-pad model, is also studied. The linear kinematic hardening model with rate independent elastic-plastic plasticity is used for benchmark and real disc-pad model. The results of the benchmark model and the real model are observed to be similar in terms of plasticity theory.

Automatic Design Of Wiring Pattern For Car Seat Heaters


Automatic Design Of Wiring Pattern For Car Seat Heaters

Abstract :

This projects aims to develop design automation in product development. Design automation
causes increase in producibility and decrease in product cost and manufacturing lead time.

The study at hand is proposed to provide a new method and to introduce procedure to the design of wiring pattern for a car seat heater for Kongsberg Automotive, KA. KA is a Norwegian company and a global provider of engineering, design, and manufacture for seat comfort, driver and motion control systems, fluid assemblies, and industrial driver interface products. The method that currently is used in the company to create a wiring pattern is neither sufficient enough nor automated.
In order to design the wiring pattern, at first procedure is handled by the designer. Secondly, car
seat heater 2D layout is imported and then, the dimensions of the elements are defined as
constraints. Then VBA codes are opened and the program is run. The result will be a wiring
pattern in different 2D layouts. To make the design process easier, we have modeled five different layouts; wiring pattern of one element, two elements, three elements, five elements (with two back sides) and one element trapezoidal 2D layout.

The algorithm written in VBA (Visual basic for application) creates the pattern according to the
dimensions of the elements which are used as inputs to define constrained parameters. The created macros are simple to use and easy to modify, independent from the programming knowledge. The user is only responsible with parameter input and running the program. The solution gives wiring pattern for a car seat heater.

CFD Measurements of the Cooling Air in a DC-Motor


Latest Mechanical Engineering Seminar Topic on CFD Measurements of the Cooling Air in a DC-Motor

 Abstract :

The cooling system of a DC-motor is examined in this thesis. A change of direction of the
cooling air is desired to prevent the generated coal dust from entering into the windings of the
machine. Ultimately this will have a negative effect on the cooling in the machine and the loss
of cooling needs to be compensated through other ways. The purpose of this thesis is to work
for an improved operational safety and performance of the DC-motor and to make it more
competitive in the market. By modelling the interior geometry of the machine and defining
the boundaries in the software programs Gambit and FLUENT respectively, the motion and
the heat transfer of the airflow could be simulated. The simulation results would give us an
understanding of the flow pattern which later could be used to develop design modifications
on the cooling system of a DC-motor. In this thesis the main focus lies on creating a
simulation model with a sufficiently fine mesh size.




Summary :

The cooling system in a certain rotating machine of the type direct current (DC-) motor is
examined in this thesis. In a DC-motor there is coal dust generated at the connecting surfaces
between a stationary part where the electric current is inserted to the rotor (the Brushes) and
the adjoining rotating surface (the Commutator). This dust is sucked in through the windings
of the machine when the airflow is going from the non-drive side of the machine, which is the
most common nowadays, and this dust is causing a lot of damage. The idea investigated in
this thesis is to drive the airflow through the machine from the opposite side, the drive side,
and by doing so also avoid getting the dust into the machine. From a thermodynamic point of
view though this is less efficient and the deterioration of the cooling should be counteracted
by improving the cooling in other ways. The purpose is to work for an improvement of the
operational safety and the performance of the DC-motor and to make it more competitive in
the market.

The first and main goal with this thesis work was to create a simplified model of the DCmotor
that simulates the flow and heat transfer of the cooling air through the system. This
model could then be used to analyze the airflow through the machine. By examining different
properties of the cooling air it would eventually lead to a better understanding of the general
motion and heat-transfer pattern of the air in the system. The final objective would have been
to use the simulation model and the knowledge of the patterns in the fluid to develop design
modifications in the machine that would improve the cooling. Unfortunately this goal was
never reached because of the complexity of the task and time limitation of the thesis.
For the building up and the simulation of the created models the software programs Gambit
and FLUENT were used. First of all a simple 2D model version was made to give us an
overview of what kind of problems that could occur during modelling and simulation. A cross
section segment of the Commutator was modelled and simulation results of the velocity and
temperature in the airflow were generated from it. From those results it was noted that there
was a short cutting airflow along the outer wall where cold air went directly from the inlet to
the outlet passage, and another flow closer to the Commutator wall that was circulating in a
vortex formation distributing the heat from the surface to a larger area.

The main modelling work was put on a 3D-model of the DC-motor with sizes of geometry
and mesh parametrisized. Since the modelling was rather complex it was delimited to include
just the Commutator part of the machine. Further it was necessary to systemize the geometry
building to get a higher level of control and this was accomplished by defining the whole
geometry in Python script which would generate a Gambit journal file when compiled. In the
Python script the geometry was divided into three separate sections, each projected onto a
general radial plane, and there after extruded stepwise in the axial direction. The formed
volumes could then be activated or deactivated from its mesh according to the conditions in
the machine which is reproduced. Because of the structure in the axial direction it is possible
to use prism-shaped mesh cells in each section and thereby decrease the number of mesh cells needed. All the volumes containing air were meshed and simulated as well as one solid
volume, the copper layer on the Commutator surface where axial heat conduction occurs.
Further the turbulence model used here was the k-omega model. It was chosen because it was
more convenient since you are able to use both a near wall function and a function for the
wall roughness for the same surface.


Wednesday, October 9, 2013

Aeronautical Engineering Seminar Topics

Latest Seminar Topics For Aeronautical Engineering 2014 Collection of latest seminar topics for Aeronautical engineering 2013. Download full latest seminar topics for Aeronautical engineering 2013

List of Aeronautical Engineering Seminar and Project reports. It will very help full to the student of Aeronautical Engineers.


Aeronautical Engineering Seminar Topic list
Aeronautical Engineering



Advanced flight technology,
Aeronautical satellite communications,
Max launch abort systems,
Improvement and Implementation of Aerospace testing technology,
Gas-generator cycle (rocket)
Re-Entry Of Space Vehicle
Ramjet, Scramjet Engines
Aircraft navigation Systems
Space Shuttles And Its Advancements
Advances in Rocket Propulsion
Quasi Turbine Engines
Low Cost Spacecraft Simulator
Clearance of Space Debris
Materials used in Space Re-entry Vehicles
Fuel Cells on Aerospace
Advanced flight technology
Magnetoplasmadynamic thruster

Environmental Engineering Science

Latest Seminar Topics For Environmental Engineering 2014 Collection of latest seminar topics for Environmental engineering 2013. Download full latest seminar topics for Environmental engineering 2013 

Environmental Engineering Science is the integration of Science and engineering principles to improve the natural environment, to provide healthy water, air, and land for human habitation and for other organisms, and to re-mediate pollution sites.


Environmental Engineering
Environmental Engineering Science
  1. Carbon Abatement Technologies[CATs]
  2. Co-firing with a CO2-neutral biomass
  3. Supercritical and IGCC coal-fired power plant
  4. Saline aquifers
  5. Global Environmental Facility
  6. Environmental impact assessment and mitigation
  7. Water supply and treatmentElectrostatic precipitators
  8. Catalytic converters
  9. Volatile organic compounds (VOC)
  10. Reactive organic gases (ROG)
  11. Recycled container housing
  12. Organic production of high-value products from seaweed
  13. Floating, ecological, multi-power source desalination plant
  14. Hyper-sound water-purifying system
  15. Green IT concept
  16. Treadmills that convert the rotation of the belt into electricity
  17. Designer shopping Cloth bags
  18. Reusing instead of recycling packaging
  19. Environmental policy and regulation development
  20. Contaminated land management and site remediation
  21. Hazardous waste management
  22. Solid waste management
Enjoy Environmental Engineering Seminar Topics List.

Wednesday, October 2, 2013

List of Engineering Branches in India

Engineering Seminar Topics and Reports: List of Engineering Branches

List of Top Engineering Branches |  Engineering Streams | Engineering Fields in India

A

  1. Aeronautical Engineering
  2. Aerospace Engineering
  3. Agricultural and Food Engineering 
  4. Agricultural and Irrigation Engineering
  5. Agricultural Engineering
  6. Aircraft Manufacturing and Maintenance Engineering
  7. Applied Electronics and Instrumentation Engineering 
  8. Architecture Engineering  
  9. Automation and Robotics
  10. Automobile Engineering 
  11. Automotive Engineering.

B

  1. Bio Engineering 
  2. Bio-Medical and Instrumentation Engineering
  3. Biochemical Engineering
  4. Biological Sciences and Bioengineering
  5. Biomedical Engineering
  6. Biotechnology and Biochemical Engineering
  7. Biotechnology Engineering
  8. Building and Construction Engineering

C

  1. Carpet and Textile Technology
  2. Ceramic Engineering 
  3. Ceramics and Cement Engineering
  4. Chemical and Polymer Engineering
  5. Chemical Ceramic Technology
  6. Chemical Engineering 
  7. Civil and Structural Engineering 
  8. Civil Engineering  
  9. Civil Environmental Engineering
  10. Computer Science Engineering
  11. Construction Technology 
  12. Construction Technology and Management

D

  1. Dairy Technology 

 E

  1. Economics
  2. Electrical and Communications Engineering
  3. Electrical and Electronics Engineering 
  4. Electrical and Instrumentation Engineering
  5. Electrical Engineering 
  6. Electronics and Biomedical Engineering
  7. Electronics and Communication Engineering
  8. Electronics and Computer Engineering
  9. Electronics and Electrical Communication
  10. Electronics and Instrumentation Engineering
  11. Electronics and Media Technology
  12. Electronics and Power Engineering  
  13. Electronics and Telecommunication Engineering 
  14. Electronics Control Systems Engineering 
  15. Electronics Engineering  
  16. Electronics Engineering - Design and Manufacturing  
  17. Electronics Product Design Technology 
  18. Engineering Chemistry 
  19. Engineering Physics 
  20. Environmental Engineering.

 

  1. Fashion and Apparel Engineering
  2. Fashion Technology
  3. Food and Biochemical Engineering  
  4. Food Processing and Technology
  5. Food Technology 

  1. General Science  
  2. Genetic Engineering
  3. Geo informatics
  4. Geosciences and Remote Sensing
  5. Geo-technical Engineering

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z







Related Posts Plugin for WordPress, Blogger...