ENME404-19S2 (C) Semester Two 2019

Aerodynamics and Ground Vehicle Dynamics

15 points

Details:
Start Date: Monday, 15 July 2019
End Date: Sunday, 10 November 2019
Withdrawal Dates
Last Day to withdraw from this course:
  • Without financial penalty (full fee refund): Friday, 26 July 2019
  • Without academic penalty (including no fee refund): Friday, 27 September 2019

Description

Aerofoil theory; Flat plate lift and drag; Aerofoil lift and drag; Predicting aerofoil data with Xfoil; Boundary layer theory; Aircraft performance; Stability and control in flight; Wind tunnel testing; Glider design, build and test; Propeller design; BEMT method; High speed (compressibility) effects; Wheeled ground vehicles: load transfer, tyre design, traction and rolling resistance, aerodynamics, suspension and steering

This course teaches the fundamental understanding and some of the design skills required for aerodynamic design in the aviation and automotive industries, with relevance also to the wind and hydroelectric power industries. The course strengthens skills required for almost any industrial application with moving fluids.

Theoretical knowledge in the topics above will be taught by lectures and self-paced study with online materials. Practical exercises include modelling aerofoils with Xfoil, measuring aerofoil properties in a wind tunnel, designing and building a hand-launched glider from supplied materials, and modelling wheeled vehicle dynamics in MATLAB.

Aerofoil properties:
• Flat plate lift and drag
• Aerofoil lift, drag and pitching moments
• Pressure and shear stress distributions on aerofoils, and their integration to lift and drag
• Polar data
• Tip vortices and other finite wing effects

Aircraft performance:
• Equations of motion for flight vehicles
• Glide ratio
• Thrust required
• Power required
• Range and endurance
• Takeoff and landing
• High lift devices
• Turning performance

Stability and control of flying vehicles:
• Control surfaces for fixed-wing craft
• Actuators
• Longitudinal stability (trim) treated quantitatively
• Lateral, directional and roll stability treated qualitatively

Potential flow analysis methods:
• Definition of flow potential and streamline functions
• Representing simple 2D inviscid flows with potential and streamline methods
• Representing superpositions of simple 2D inviscid flows

Propeller systems:
• Propeller design considerations
• Blade element momentum theory (BEMT) design method

High speed effects:
• Transonic control
• Supersonic control and drag
• Supersonic propulsion

Compressible flow:
• Speed of sound and Mach number
• Thermo-fluid dynamics of compressible flow
• Adiabatic nozzle flow and applications in flow rate control and propulsion
• Normal shocks

Wheeled ground vehicle dynamics:
• Load transfer in cornering
• Tyre design, traction and rolling resistance
• Ground vehicle aerodynamics
• Suspension types
• Steering geometry

Learning Outcomes

  • Learning Outcomes and National Qualifications Framework (NQF)

    Knowledge outcomes:
  • Solid grasp of the fluid dynamics underlying aerodynamics and methods for computing the pressure distributions and total lift, drag and moments
  • Knowing where to find and how to manipulate empirical data to estimate drag and lift on simple bodies
  • Knowing how to represent simple 2D inviscid flows with simple potential and streamline methods
  • Knowing what determines the performance of systems with compressible flow at Mach numbers greater than 0.3
  • Knowledge of the relationship between flying vehicle configuration, control surface layout and stability

    Fundamental knowledge of the forces governing ground vehicle performance and comfort and their relationship to steering, suspension and tyres.

    Skills outcomes:
  • Ability to choose an appropriate airfoil for a specific application
  • Ability to design a body enclosing a given envelope for low aerodynamic or hydrodynamic drag
  • Ability to estimate thrust, power, range, endurance and speed in flight
  • Ability to design and construct simple lightweight gliders
  • Ability to quickly represent common flow patterns with streamline and potential methods
  • Ability to choose appropriate tyres and tyre pressures for a ground vehicle and calculate power requirements for given speeds.

    Personal attributes developed:
  • Communicating complex concepts to peers
  • Designing and constructing optimal systems with limited resources

Prerequisites

ENME304 or ENME314

Course Coordinator / Lecturer

Mark Jermy

Assessment

Assessment Due Date Percentage  Description
Final Exam 60%
Flight tests 5% Glider Performance Results
Assignment 1 05 Aug 2019 10% Wing planform exercise
Lab Report 23 Aug 2019 10% Aerofoil Lab Report
Assignment 2 20 Sep 2019 10% Glider Design Report
MATLAB Exercise 07 Oct 2019 5%

Textbooks / Resources

Recommended Reading

Anderson, J D; Fundamentals of Aerodynamics ; McCraw-Hill, 2010 (Choose one of the recommended textbooks).

Anderson, J D; Introduction to Flight ; McGraw-Hill, 2005 (Choose one of the recommended textbooks).

MIT; The Simple Science of Flight ; 2009 (General Interest).

Indicative Fees

Domestic fee $1,080.00

International fee $5,250.00

* All fees are inclusive of NZ GST or any equivalent overseas tax, and do not include any programme level discount or additional course-related expenses.

For further information see Mechanical Engineering .

All ENME404 Occurrences

  • ENME404-19S2 (C) Semester Two 2019