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Unit of study_

MECH5265: Combustion

This unit of study aims to teach the basic principles of combustion highlighting the role of chemical kinetics, fluid mechanics, and molecular transport in determining the structure of flames. Students will become familiar with laminar and turbulent combustion of gaseous and liquid fuels including the formation of pollutants. Students will also be briefly introduced to various applications such as internal combustion engines, gas turbines, and fires. This unit will cover equilibrium compositions, flammability limits, simple chemically reacting systems, detailed chemical kinetics, and the basic theory underlying laminar and turbulent combustion for both premixed and non-premixed cases. There will be an introduction to droplet and spray combustion, the concept of mixture fraction for non-premixed flames, combustion in engines and gas turbines as well as the formation of pollutants. New concepts for clean modern engines, with increasing reliance on renewable energy, are highlighted. Issues relating to buoyant fires and plumes, including fire suppression may also be covered.

Details

Academic unit Aerospace, Mechanical and Mechatronic
Unit code MECH5265
Unit name Combustion
Session, year
? 
Semester 2, 2021
Attendance mode Normal day
Location Remote
Credit points 6

Enrolment rules

Prohibitions
? 
MECH4265 OR MECH8265
Prerequisites
? 
(MECH3260 AND MECH3261) OR MECH9260 or MECH8260
Corequisites
? 
None
Assumed knowledge
? 

Students are expected to be familiar with the basic laws of thermodynamics, fluid mechanics and heat transfer.

Available to study abroad and exchange students

Yes

Teaching staff and contact details

Coordinator Assaad Masri, assaad.masri@sydney.edu.au
Lecturer(s) Mohamed Marei , mohamed.marei@sydney.edu.au
Type Description Weight Due Length
Tutorial quiz Quiz-1
In-class Quiz
10% Week 04
Due date: 01 Sep 2021
30 minutes
Outcomes assessed: LO1 LO2 LO3 LO4
Assignment Assignment-1
Take home assignment
5% Week 06
Due date: 17 Sep 2021
10 hours to complete over 6 weeks
Outcomes assessed: LO1 LO2 LO3 LO4
Tutorial quiz Quiz-2
In-class Quiz
10% Week 07
Due date: 22 Sep 2021
30 minutes
Outcomes assessed: LO1 LO2 LO3 LO4
Tutorial quiz Quiz-3
In-class Quiz
10% Week 09
Due date: 13 Oct 2021
30 minutes
Outcomes assessed: LO1 LO2 LO3 LO4
Presentation Seminar
Presentation-1 of work performed in major project.
5% Week 09
Due date: 15 Oct 2021
About 3 to 5 minutes per student
Outcomes assessed: LO1 LO5 LO4 LO3 LO2
Assignment Assignment-2
Take home assignment
5% Week 11
Due date: 29 Oct 2021
10 hours to complete over 5 weeks
Outcomes assessed: LO1 LO2 LO3 LO4
Tutorial quiz Quiz-4
In-class Quiz
10% Week 12
Due date: 03 Nov 2021
30 minutes
Outcomes assessed: LO1 LO2 LO3 LO4
Presentation Seminar
Presentation-2 of work performed in major project.
5% Week 13
Due date: 10 Nov 2021
About 3 to 5 minutes per student
Outcomes assessed: LO1 LO2 LO3 LO4 LO5
Assignment group assignment Project
Major project work in groups. Submit one report per group.
40% Week 13
Due date: 12 Nov 2021
30 hours to complete over 8 weeks
Outcomes assessed: LO1 LO2 LO3 LO4 LO5
group assignment = group assignment ?
  • Assignment: The assignments and/or quizzes will help students absorb the concepts and stay up to date with the pace of lectures.
  • Project: The project report and the seminar will test the ability of students to interact in a group environment, apply the concepts to a realistic problem, and relay them effectively in the form of a seminar and report. Group projects and seminars are aspects of training that are beneficial for engineers since this is common practice in fire and combustion engineering.
  • Final Exam: The final examination will help evaluate the overall understanding of the concepts covered in this unit and the student`s ability to analyze and solve related problems.

Detailed information for each assessment can be found on Canvas.

Assessment criteria

The University awards common result grades, set out in the Coursework Policy 2014 (Schedule 1).

As a general guide, a high distinction indicates work of an exceptional standard, a distinction a very high standard, a credit a good standard, and a pass an acceptable standard.

Result name

Mark range

Description

High distinction

85 - 100

 

Distinction

75 - 84

 

Credit

65 - 74

 

Pass

50 - 64

 

Fail

0 - 49

When you don’t meet the learning outcomes of the unit to a satisfactory standard.

For more information see sydney.edu.au/students/guide-to-grades.

Late submission

In accordance with University policy, these penalties apply when written work is submitted after 11:59pm on the due date:

  • Deduction of 5% of the maximum mark for each calendar day after the due date.
  • After ten calendar days late, a mark of zero will be awarded.

Special consideration

If you experience short-term circumstances beyond your control, such as illness, injury or misadventure or if you have essential commitments which impact your preparation or performance in an assessment, you may be eligible for special consideration or special arrangements.

Academic integrity

The Current Student website provides information on academic honesty, academic dishonesty, and the resources available to all students.

The University expects students and staff to act ethically and honestly and will treat all allegations of academic dishonesty or plagiarism seriously.

We use similarity detection software to detect potential instances of plagiarism or other forms of academic dishonesty. If such matches indicate evidence of plagiarism or other forms of dishonesty, your teacher is required to report your work for further investigation.

WK Topic Learning activity Learning outcomes
Week 01 Introduction and terminology Lecture and tutorial (3 hr) LO1
Revision of third year related material Independent study (6 hr) LO1
Week 02 Chemical equilibrium Lecture and tutorial (3 hr) LO1
Chemical Equilibrium Independent study (6 hr) LO1
Week 03 Flammability, ignition and extinction Lecture and tutorial (3 hr) LO1
Flammability, ignition and extinction Independent study (6 hr) LO1
Week 04 Chemical kinetics Lecture and tutorial (3 hr) LO1 LO2
Chemical Kinetics Independent study (8 hr) LO1 LO2
Week 05 1. Simple reacting systems; 2. Mixture fraction concept Lecture and tutorial (3 hr) LO1 LO2
Reacting systems and mixture fraction Independent study (8 hr) LO1 LO2
Week 06 Laminar diffusion flames Lecture and tutorial (3 hr) LO1 LO2 LO3
Laminar diffusion flames and Major Project Independent study (9 hr) LO1 LO2 LO3
Week 07 Laminar premixed flames Lecture and tutorial (3 hr) LO1 LO2 LO3
Laminar premixed flames and Major Project Independent study (9 hr) LO1 LO2 LO3
Week 08 Droplet evaporation and combustion. Spray flames Lecture and tutorial (3 hr) LO1 LO2 LO3
Sprays and Major Project Independent study (9 hr) LO1 LO2 LO3
Week 09 Turbulence and modelling of turbulent combustion. Lecture and tutorial (3 hr) LO1 LO2 LO3 LO4
Turbulent flows and Major Project Independent study (9 hr) LO1 LO2 LO3 LO4
Week 10 Turbulent premixed and diffusion flames. Lecture and tutorial (3 hr) LO1 LO2 LO3 LO4
Turnulent flames and Major Project Independent study (9 hr) LO1 LO2 LO3 LO4
Week 11 Fires (1-Hour), Next Generation Engines (1-Hour) Lecture and tutorial (3 hr) LO1 LO2 LO3 LO4 LO5
Fires, Engines and Major Project Independent study (9 hr) LO1 LO2 LO3 LO4 LO5
Week 12 Pollutants formation (1hr), Clean Fuels & the Future of Combustion (1hr) Lecture and tutorial (3 hr) LO1 LO2 LO3 LO4 LO5
Pollutants and Major Project Independent study (9 hr) LO1 LO2 LO3 LO4 LO5
Week 13 Student presentations Lecture and tutorial (3 hr) LO1 LO2 LO3 LO4 LO5
Project Report Independent study (9 hr) LO1 LO2 LO3 LO4 LO5

Study commitment

Typically, there is a minimum expectation of 1.5-2 hours of student effort per week per credit point for units of study offered over a full semester. For a 6 credit point unit, this equates to roughly 120-150 hours of student effort in total.

Required readings

All readings for this unit can be accessed through the Library eReserve, available on Canvas.

  • Stephen R. Turns – An Introduction to Combustion. McGraw Hill, 2000. 0-07-230096-5 (or later editions).
  • Additonal papers relevant to the project will be made available on Canvas

Learning outcomes are what students know, understand and are able to do on completion of a unit of study. They are aligned with the University’s graduate qualities and are assessed as part of the curriculum.

At the completion of this unit, you should be able to:

  • LO1. Understand combustion modes including laminar, turbulent, diffusion and premixed flames.
  • LO2. Analyse a simple chemically reaction system and calculate the equilibrium composition.
  • LO3. Compute the compositional structure of laminar flames including the formation of pollutants.
  • LO4. Awareness of environmental issues, the advent of renewable, green fuels and sustainable combustion
  • LO5. Appreciation of future trends in modern engines and turbines contributing to decarbonization through the use of clean fuels.

Graduate qualities

The graduate qualities are the qualities and skills that all University of Sydney graduates must demonstrate on successful completion of an award course. As a future Sydney graduate, the set of qualities have been designed to equip you for the contemporary world.

GQ1 Depth of disciplinary expertise

Deep disciplinary expertise is the ability to integrate and rigorously apply knowledge, understanding and skills of a recognised discipline defined by scholarly activity, as well as familiarity with evolving practice of the discipline.

GQ2 Critical thinking and problem solving

Critical thinking and problem solving are the questioning of ideas, evidence and assumptions in order to propose and evaluate hypotheses or alternative arguments before formulating a conclusion or a solution to an identified problem.

GQ3 Oral and written communication

Effective communication, in both oral and written form, is the clear exchange of meaning in a manner that is appropriate to audience and context.

GQ4 Information and digital literacy

Information and digital literacy is the ability to locate, interpret, evaluate, manage, adapt, integrate, create and convey information using appropriate resources, tools and strategies.

GQ5 Inventiveness

Generating novel ideas and solutions.

GQ6 Cultural competence

Cultural Competence is the ability to actively, ethically, respectfully, and successfully engage across and between cultures. In the Australian context, this includes and celebrates Aboriginal and Torres Strait Islander cultures, knowledge systems, and a mature understanding of contemporary issues.

GQ7 Interdisciplinary effectiveness

Interdisciplinary effectiveness is the integration and synthesis of multiple viewpoints and practices, working effectively across disciplinary boundaries.

GQ8 Integrated professional, ethical, and personal identity

An integrated professional, ethical and personal identity is understanding the interaction between one’s personal and professional selves in an ethical context.

GQ9 Influence

Engaging others in a process, idea or vision.

Outcome map

Learning outcomes Graduate qualities
GQ1 GQ2 GQ3 GQ4 GQ5 GQ6 GQ7 GQ8 GQ9
I would like to thank all students for their constructive comments. The concerns revolved around three main issues: (i) More practice question, (ii) Quizzes being too close to lectures (iii) More guidance on the project. Here are my responses: I. We have already provided more practice questions in 2020 but students want more so we can provide more in 2021- This is done. II. This is a valid point imposed by the timetable constraint. I will seek a timetabling change for 2021 so that the tutorial is held on Friday or Thursday after the lecture which is timetable for Wednesday. This is done. III. We have provided this year three additional tutorial hours conducted over lunch time. This was in response to a similar request last year. Students just leave it too late until they start serious work on the project and then they want all the help they can get. What I will introduce in 2021 is a more directed support to each group so that everyone gets equal share of the tutorial time. I have doubled the additional tutorial sessions to six hours.

Disclaimer

The University reserves the right to amend units of study or no longer offer certain units, including where there are low enrolment numbers.

To help you understand common terms that we use at the University, we offer an online glossary.