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Thermofluid and Mechanical Systems 3

  • Module code: ME6011
  • Year: 2018/9
  • Level: 6
  • Credits: 30
  • Pre-requisites: ME5011
  • Co-requisites: None

Summary

This core module is designed to extend your knowledge of the analytical techniques of fracture mechanics, stress analysis and thermofluid to analyse and design engineering structures and systems.

This module builds on the knowledge gained in the second year Thermofluids & Mechanical Systems 2 module to extend your knowledge and skills in structural analysis based on fracture mechanics and fatigue. Simulation will be used to give a practical introduction to the finite element analysis (FEA) method for structural analysis. Thermofluids mechanics aspects involving conversion and transfer of energy such as turbomachines (pumps, turbines...) and heat exchangers will be discussed. The module also provides a further understanding of numerical methods employed in fluid flow and heat transfer analysis using computational fluid dynamics (CFD).

The module is primarily delivered through lectures supported by tutorials. Course materials are available via Canvas where appropriate.

Aims

  • To introduce students to design of structures based on fracture mechanics.
  • To extend the students' knowledge of the analytical techniques of stress analysis and to introduce the students to modern computer-based solutions of stress and structural problems by finite element analysis (FEA) and familiarity with FEA commercial software.
  • To extend students' knowledge and skills of thermofluid mechanics and supporting materials to the design and specification of energy conversion, distribution, transfer and utilisation systems.

Learning outcomes

On successful completion of the module, students will be able to:

  • Apply linear elastic fracture mechanics (LEFM) in structural fracture analysis.
  • Apply the fracture mechanics principles for the analysis of structural fatigue failure.
  • Use FEA to solve one- and two-dimensional structural problems both theoretically and with commercial software. Use CFD commercial software to solve fluids flow in engineering problems.
  • Describe the pressure and velocity distribution in compressible flow systems, and describe the causes and methods of evasion of fluid transients in pipe systems.
  • Identify a range of rotodynamic machines, sketch their performance characteristics and derive the laws of various machines.
  • Describe and analyse heat transfer systems. Apply this knowledge to the design and specification of thermal equipment, e.g., heat exchangers.

Curriculum content

  • Introduction to finite element theory and applications.
  • Three dimensional Hooke's law for stress and strain, stress concentration at discontinuity.
  • Fracture mechanics theory and experimental methods. Crack opening displacement methods.
  • Fatigue crack initiation and propagation. Low and high cycle fatigue. Surface condition and microstructure. Life prediction, statistical methods.
  • Thin and thick-walled cylinders with internal pressure loading. Interference fits.  Plastic failure. Rotating cylinders.
  • Creep and stress relaxation. Advanced composites. Adhesives and coatings.
  • Subsonic and supersonic flows with application to flow in nozzles and ducts. Determination of flows, areas and thrusts.
  • Water hammer and surge, methods of analysis. Application of numerical, graphical and computer methods.
  • Skin friction in laminar and turbulent boundary layers. Applications to forces on surfaces
  • Performance characteristics, isolated blade and cascades, cavitations. Applications to forces on surfaces.
  • Performance characteristics, isolated blade and cascades, cavitations. Application to series and parallel operation, selection and system machine.
  • General heat conduction equation, numerical solutions, fin theory, transient heat transfer. Applications. Convection, natural, mixed and forced. Heat transfer coefficients, heat exchanger design. Radiation and furnace design.
  • Gas and vapour mixtures, hygrometry. Application to plant systems vapour and gas power cycles.
  • Introduction to the fundamental concepts and techniques used in Computational Fluid Dynamics (CFD) with practical application using commercial software.

Teaching and learning strategy

The module is delivered through a variety of lectures, tutorials, computing workshops and presentation of a researched topic. Lecture material, tutorials and support material will be made available on Canvas. Use of LRC electronic resources such as iCAT and ebooks and resources available on internet are introduced and students are encouraged to use them. Lectures and tutorials are designed to introduce the students to the concepts necessary to understand the engineering problems associated with advanced thremofulids and structural analysis. Students will be expected to research contemporary issues around structural integrity including fracture and fatigue, failure analysis and current developments in thermofluids. The lectures and tutorial sessions will provide an opportunity to develop the students' deeper understanding of the application of theoretical concepts into real world engineering problems. Opportunities to provide detailed and overview feedback and feedforward will be available during the tutorial and practical sessions.

Breakdown of Teaching and Learning Hours

Definitive UNISTATS Category Indicative Description Hours
Scheduled learning and teaching 22 formal lectures of 2 hours 11 tutorials of 2 hours each 13 practical 2 hours FEA/CFD computing laboratory 2 sessions of peer to peer project presentations seminar 44 22 26 4
Guided independent study 204
Total (number of credits x 10) 300

Assessment strategy

The module will be assessed as 50% coursework and 50% end of module unseen written examination.

The computing workshops and tutorial classes will provide formative assessment opportunities in the early stages of the modules, enabling feedback and feed forward to the summative events. The evaluation of a students' progress throughout the module will be assessed by two written coursework. One coursework includes failure analysis of a structure, hand calculation and using FEA commercial software to solve a structural problem and CFD analysis to solve a flow problem with commercial software. This coursework carries 30% of the total marks. The second coursework will focus on the application of thermofluids in rotodynamic machines and heat transfer. Students are expected to apply thermofluids theories to solve a range of the flow problems with a view to enabling the students to develop their critical analysis skills. This coursework carries 20% of the total marks.

Mapping of Learning Outcomes to Assessment Strategy (Indicative)

Learning Outcome Assessment Strategy
1) Apply liner elastic fracture mechanics (LEFM) in fracture analysis of structures. Coursework: FEA/CFD and Failure Analysis Final written exam
2) Apply the fracture mechanics principles for the analysis of structural fatigue failure. Coursework: FEA and Failure Analysis Final long answer examination
3) Use FEA to solve one- and two-dimensional structural problems both theoretically and with commercial software. Use CFD commercial software to solve fluids flow in engineering problems. Coursework: FEA/CFD and Failure Analysis Final written exam
4) Describe the pressure and velocity distribution in compressible flow systems, and describe the causes and methods of evasion of fluid transients in pipe systems. Coursework: Rotodynamic machine and heat transfer Final written exam
5) Identify a range of rotodynamic machines, sketch their performance characteristics and derive the laws of various machines. Final written exam
6) Describe and analyse heat transfer systems. Apply this knowledge to the design and specification of thermal equipment, eg., heat exchangers. Coursework: Rotodynamic machine and heat transfer Final written exam

Elements of Assessment

Description of Assessment Definitive UNISTATS Categories Percentage
Written exam Written exam 50%
Portfolio of failure analysis/FEA/CFD reports Coursework 30%
Problem assignment Coursework 20%
Total (to equal 100%) 100%

Achieving a pass

It IS NOT a requirement that any element of assessment is passed separately in order to achieve an overall pass for the module

Bibliography core texts

[1] Anderson T. L., Fracture Mechanics: Fundamentals and Applications, 4th edition, 2017.

[2] Becker A A, An Introductory Guide to Finite Element Analysis, Professional Engineering Publishing, 2004, ISBN 1 86058 410 1

[3] Claus Borgnakke, Richard E. Sonntag , Fundamentals of Thermodynamics, 8th  edition, John Wiley & Sons, 2013.

[4] Kurt M. Marshek Robert C. Juvinall, Machine Component Design, 5th edition, 2012.

[5] Versteeg H. and Malalasekera W., An introduction to computational fluid dynamics: the finite volume method, 2nd Ed., Prentice Hall, 2007. ISBN-13:  9780131274983.

Bibliography recommended reading

Fracture and Fatigue

[1] Shukla A, "Practical Fracture Mechanics in Design, Second Edition, CRC, 2004, ISBN: 0824758854.

[2] Kanninen M. F., Advanced Fracture Mechanics, Oxford University Press, 1985, ISBN: 0195035321.

[3] Saxena A., Nonlinear Fracture Mechanics for Engineers, CRC Press, 1998, ISBN: 0849394961

[4] Stephens Ralph I., Metal Fatigue in Engineering, Wiley-Interscience; 2nd edition, 2000, ISBN: 0471510599

[5] Bannantine Julie A., Fundamentals of Metal Fatigue Analysis, Prentice Hall; 1st edition, 1989, ISBN: 013340191X.

[6] Broek D., The Practical Use of Fracture Mechanics, Springer; 1st edition, 1989, ISBN: 0792302230.

[7] Broek D., Elementary Engineering Fracture Mechanics, Springer; 2nd edition, 1989. ISBN: 9024726565.

Composites

[1] Barbero Ever J., Introduction to Composite Materials Design, 2nd edition, CRC Press, 2010.

[2] George Z. Voyiadjis, Peter Kattan, "Mechanics of Composite Materials with MATLAB", Springer; 1st edition 2005, ISBN: 3540243534

Finite Elements Analysis and Computational Fluid Dynamics

[1] Bryan J Mac Donald, Practical Stress Analysis with Finite Elements, 2nd Edition, 2011.

[2] Andreas Öchsner and Markus Merkel, One-Dimensional Finite Elements: An Introduction to the FE Method, Publisher: Springer, 2nd ed. 2018. [4] Jiyuan Tu, Guan Heng Yeoh, Chaoqun Liu, Computational Fluid Dynamics, Second Edition: A Practical Approach 2nd Edition, Butterworth-Heinemann; 2 edition, 2012, ISBN-10: 0080982433

Thermofluids

[1] Claus Borgnakke, Richard E. Sonntag , Fundamentals of Thermodynamics, 8th  edition, John Wiley & Sons, 2013.

[2] Thermodynamics: An Engineering Approach with Student Resource DVD by Yunus A. Cengel and Michael A. Boles, 2010.

[3] Rogers and Mayhew, Engineering Thermodynamics: Work and Heat Transfer, Longman, 1992

[4] J. F. Douglas, John Gasiorek, John Swaffield and Lynne Jack, Fluid Mechanics, 6th edition, 2011.

[5] Frank M. White, Fluid Mechanics (SI units), 7th edition, 2011

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