Master of Engineering

                 (Mechanical)

Assessment Instructions:

1. Please familiarise yourself with the EIT Academic Honesty and Misconduct Policy, in order to understand your requirements and responsibilities as a student of EIT.

1. Please refer to our Assessment, Moderation and Student Progress Procedure for information relating to extensions. Extension requests should be submitted to your LSO at least 3 days prior to the due date.

1. Assessments submitted via email will not be accepted.

1. Assessments must be submitted through Turn-it-in (unless otherwise stated). Your submission must:

1. Be a single document (Word or PDF only)

1. Include at least 20 words of machine-readable text, and

1. Not exceed 10MB.

1. You must use the provided assessment cover page available on your Moodle student homepage. Submissions without a cover page will not be accepted.

1. You must correctly title your document/s. For example:

UNIT#_ASSESSMENT#_YOURNAME_DATE

E.g. ME501_Assessment2_SteveMackay_01Aug2019

1. You must reference all content used from other sources including course materials, slides, diagrams, etc. Do not directly copy and paste from course materials or any other resources. Refer to the referencing section of the EIT eLibrary on Moodle for referencing guides.

1. It is your responsibility to check that you have submitted the correct file, as revised submissions are not permitted after the due date and time.

Important note: Failure to adhere to the above may result in academic penalties. Please refer to the unit outline or EIT Policies and Procedures for further information.
 

Please complete your answers on the assessment cover page document available on Moodle.

Clearly label your question numbers (there is no need to copy the full question over). Include all working out.

Final Project: (80 marks)

Aerofoil design plays a pivotal role in the wing and control surface performance in aerospace engineering. Whilst wind-tunnel testing can be rather time-consuming and expensive, CFD provides an attractive alternative. Modelling of flow over an aerofoil is an important CFD problem. Amongst the many aerofoil design features, the flap (shown in figure below) that when deployed increases the camber of the wing to give increased lift (and drag). This phenomenon is being utilized during take-off and landing in most aircraft as lift (and drag)-enhancing devices.

Figure 1: Illustration for the use of flaps to shift the lift curve. Source: J. Tu, Computational Fluid Dynamics - A Practical Approach, 3rd Edition, Butterworth- Heinemann, 2008
 

The project will focus on the aerodynamic characteristics of a two-dimensional NACA 23012 aerofoil with a 20% scaled NACA 23012 plain flap. The aerofoil will be modelled at 0-degree angle of attack with flap settings of 0, 10, 20, 30, and 40 degrees. The Reynolds number of 1,400,000 helps to study the turbulent characteristics of the combo. The lift and drag coefficient and flow separation will be determined using the standard RNG k–ε. Results will be validated against benchmark experimental data of Carl Wenzinger (Carl J. Wenzinger, 1937, Pressure distribution over an NACA 23012 Airfoil with an NACA 23012 external-airfoil flap. NACA Report No. 614).

Present the above in the form of a report, including:

1. Introduction (5 marks): A brief introduction about computational fluid dynamics as an engineering and research tool, and how it would be used in this project to study the effect of flaps on an aerofoil.

1. Problem statement (5 marks): A short declaration of the project requirements and how to achieve them is to be outlined in this section, with studied cases clearly stated along with any other constraints. Calculation of inlet speed should be clearly mentioned along with the used air properties (density and viscosity).

1. Numerical study (30 marks): In this section, details about the numerical solution method should be discussed in detail, starting with the outline of the governing equations, and passing through the computational domain, mesh, boundary conditions, solution method and convergence monitoring criteria.

1. Parameterisation (10 marks): Parameterise the project for doing a mesh independence study and explain the methodology allowing to easily reproduce the geometry from a set of points.

1. Results (20 marks): Proper illustration of the results must be carried out by the student, including velocity and pressure contour plots for all five cases, as well as a table containing achieved values of lift and drag coefficients from the numerical solution. Values for lift coefficient attained from experimental data must also be presented using data from the reference provided.
    

1. Conclusion (10 marks): Student should discuss whether the obtained results are like the experimental data or not, and if the margin of error is high, he should state why he thinks this happened. Possible solutions should be presented for future work.

Figure 2: NACA 23012 geometry with flap.

Source: Carl J. Wenzinger, 1937, Pressure distribution over an NACA 23012 Airfoil with an NACA 23012 external-airfoil flap. NACA Report No. 614

Deliver a 5-minute presentation (10 marks)

Important: This presentation is one of the mandatory requirements and if you don’t submit this

video, your assessment marks will be zero.

The requirements are as follows:

• Select key sections (solutions, calculations, screenshots of circuits) from the previous tasks of this assessment and prepare PowerPoint slides.
• Maximum 8 slides:
  • Slide 1: Add Title/Question + Unit Number & Name + Your Name and ID + Your Lecturer Name.
  • Slide 2: Objectives/Contents
  • Slides 3-7: Insert your answers: Solutions, Calculations, Simulation screenshots etc
  • Slide 8: References here in IEEE format.
• Record your 5-minutes presentation directly on PowerPoint or using Loom Video Recorder
• Introduce yourself and explain the Title/Question and Objectives briefly (1 minute)
• Start explaining your Answer/Solutions/Simulations (4 minutes)
• Paste the link of your recording within your assessment report.

Presentation Grading Rubric:
 

Self-reflection Questions: (10 marks)

1. What was my overall reflection on this project/task, and what insights or lessons did I gain that will help me grow as an engineer/engineering technician/engineering technologist?

1. What technical knowledge and skills have I gained during this project or assignment? How have I applied this knowledge to solve engineering problems and make decisions?

END OF ASSESSMENT