# FLUID MECHANICS & THERMODYNAMICS 2 - 2017/8

Module code: ENG2089

Module provider

Mechanical Engineering Sciences

Module Leader

CHEW J Prof (Mech Eng Sci)

Number of Credits

15

ECT Credits

7.5

Framework

FHEQ Level 5

JACs code

H141

Module cap (Maximum number of students)

N/A

Module Availability

Semester 1

Overall student workload

Independent Study Hours: 106

Lecture Hours: 36

Tutorial Hours: 11

Assessment pattern

Assessment type | Unit of assessment | Weighting |
---|---|---|

Examination | EXAMINATION (2 HOURS) | 80% |

School-timetabled exam/test | IN-SEMESTER TEST 1 | 10% |

School-timetabled exam/test | IN-SEMESTER TEST 2 | 10% |

Alternative Assessment

Coursework replaces class tests.

Prerequisites / Co-requisites

ENG1062 Fluid Mechanics & Thermodynamics 1

Module overview

The FHEQ Level 5 treatment of thermofluids builds on the material taught at FHEQ Level 4. It is presented in three linked sections: Thermodynamics, Heat Transfer and Fluid Mechanics.

The Thermodynamics section introduces the second law of thermodynamics, entropy and associated concepts. These are used in understanding cycles and processes, and consideration of common engine cycles.

The Heat Transfer section gives a solid grounding in aspects of heat transfer that are essential for engineers. It covers fundamental transfer mechanisms for steady state problems. Heat transfer coefficient evaluation and pipe flow problems are considered. Heat exchanger design and simple radiation exchange problems are introduced.

The Fluid Mechanics section considers incompressible, viscous, boundary layer flow and introduces compressible flow and potential flow. Boundary layer theory is related to external flow around immersed bodies, such as cars and aeroplanes, where viscous effects are important for surface drag and heat transfer. Compressible flow theory is related to aerospace and other applications where flow velocities are high and fluid density changes become significant. Potential flow theory provides a basis for calculating the flow around streamlined shapes.

Module aims

Illustrate the need for a thorough understanding of thermodynamics and heat transfer in overcoming problems associated with global warming and energy supply

Develop understanding of the second law of thermodynamics and its application to internal combustion gas power cycles

Familiarise students with the mechanisms of heat transfer and with the basic approach to solving steady state heat transfer problems and design calculation methods for a range of heat exchanger types.

Provide students with the ability to calculate the drag and heat transfer for flow over a flat plate

Introduce compressible flow behaviour in converging and diverging nozzles.

Introduce potential flow theory and its application to flow over simple two-dimensional bodies.

Learning outcomes

Attributes Developed | |
---|---|

Appreciate the need for improved energy efficiency and the use of new fuels and alternative energy sources in order to reduce CO2 emissions and conserve energy resources (EL4) | KCPT |

Demonstrate a comprehensive understanding of thermo-fluid principles applied to various engine cycles, heat exchangers and fluid flows and predict system thermal efficiency (SM1b/m, EA1b/m, EA2) | KC |

Analyse heat transfer systems, boundary layer flows and simple compressible flows using analytical and modelling techniques (SM2b/m, EA1b/m) | KC |

Attributes Developed

**C** - Cognitive/analytical

**K** - Subject knowledge

**T** - Transferable skills

**P** - Professional/Practical skills

Module content

Indicative content includes:

Fundamentals: Further treatment of Laws of Thermodynamics, principally the second law, and its corollaries. Irreversibility. Perfect gases and perfect gas processes.

Reciprocating Engine Cycles: Analysis of air standard cycles for reciprocating engines: Otto, Diesel, dual. Cycle efficiency.

Gas Turbine Cycles: Cycles of steady flow processes - gas turbine cycle, jet engine. Thermal efficiency, net specific work output and work ratio.

Heat Transfer: Introduction to heat transfer, temperature driving force, overall and film heat transfer coefficients, log mean temperature, and thermal resistance; double pipe and more complex heat exchangers; steady state heat conduction; convection mechanisms, dimensionless numbers and HTC correlations; radiation mechanisms, total enclosure, basic radiation exchange calculations.

Boundary layer flow over a flat plate (incompressible): reference to continuity and Navier-Stokes equations as exact equations; momentum integral equation for zero pressure gradient;polynomial forms for velocity distributions, boundary conditions; approximate analyses for boundary layer development;the thermal boundary layer and heat transfer from a flat plate.

Compressible inviscid flow: general description of sub and supersonic flow; Bernoulli's momentum equation, stagnation pressure, energy and stagnation temperature; isentropic flow in convergent and divergent ducts, and choking;qualitative description of over and under-expansion, and shock waves.

Potential flow: streamlines and the stream function; irrotational flow and the velocity potential; basic flows: the uniform stream, source/sink and potential vortex; superposition and the generation of more complex, two-dimensional flows.

Methods of Teaching / Learning

The learning and teaching strategy is designed to:

Introduce thermo-fluid principles through theory with worked examples. This is delivered through lectures and tutorial classes. Tutorial questions complement the lecture material with students expected to attempt the tutorial questions following the lecture and obtain help and feedback during the tutorial sessions.

Practical laboratory experiments in module ENG2093 “Numerical and Experimental Methods” are designed to complement and reinforce the material presented in this module.

The learning and teaching methods include:

3 hours lecture per week x 11 weeks

1 hour tutorial (in groups) x 11 weeks

3 hours revision lectures

Assessment Strategy

The assessment strategy is designed to provide students with the opportunity to demonstrate understanding of scientific principles, methodologies and mathematics methods as well as the ability to describe particular systems and processes. The unseen examination includes a range of questions testing the learning outcomes described above.

Thus, the summative assessment for this module consists of:

Examination Learning outcomes 1,2,3 (2 hours) {80%}

In-semester test 1 Learning outcomes 1,2 (40 mins) {10%}

In-semester test 2 Learning outcomes 3 (40 mins) {10%}

Formative assessment and feedback

Formative verbal feedback is given in tutorials.

Written feedback is given on the class tests.

Reading list

Reading list for FLUID MECHANICS & THERMODYNAMICS 2 : http://aspire.surrey.ac.uk/modules/eng2089

Please note that the information detailed within this record is accurate at the time of publishing and may be subject to change. This record contains information for the most up to date version of the programme / module for the 2017/8 academic year.