Aeroelastic Renewable Energy System

1
Aeroelastic Renewable Energy System
David Chesnutt, Adam Cofield, Dylan Henderson,
Jocelyn Sielski, Brian Spears, Sharleen Teal,
Nick Thiessen
1
2
AerodynamicsPrevious Work

• Non-dimensional analysis completed
• Compared different mathematical approaches to
  model AED system
• Selected mathematical approach - Theodorsen
  Flutter Theory
• Program writing started
• Wind tunnel testing performed to qualitatively
  observe operational characteristics of AED and
  flutter frequency using triaxial load sensor

3
AerodynamicsCurrent Model
4
Aerodynamics Completed Testing

• Purpose
• Relationship between tension and flutter
  speed/frequency
• Inputs
• Nylon Fabric Belt (1x14)
• Tested at 3 tensions (4.9N, 9.8N, 19.6N)
• Outputs
• Flutter cut-in speeds
• Vibration frequency

Testing Assembly CAD Model
4
5
Aerodynamics Future Testing

• Purpose
• Obtain displacement functions
• Calculate stresses and fatigue
• Inputs
• Steel foil belt (1x14)
• Belt tension
• Magnet Placement
• Outputs
• Flutter cut-in speed
• Vibration frequency
• Quantitative tri-axial force measurements

Testing Assembly Mounted in Wind Tunnel
5
6
AerodynamicsWork This Semester

• Complete flutter program.
• Test AED in wind tunnel to match analytical and
  theoretical results.
• Incorporate magnetic forces into program.
• Re-test AED in wind tunnel.

7
Power Conditioning System

• Circuitry model follows forever flashlight

NightStar Physics Guide
http//www.foreverflashlights.com/micro_forever_fl
ashlights.htm
8
ElectromechanicsPrevious Work

• Faction Aerodynamic force on belt
• Freaction FbeltFcoil,1 Fcoil,2
• Use Newtons Second Law of Motion to establish
  link between Lorentz forces and aerodynamic
  forces

• Equation shows relationship between induced
  voltage and circuit current
• Current is needed to find Lorentz Forces

9
ElectromechanicsPrevious Work

• Developed magnetic circuit diagram to help
  determine flux through coils
• Not adequate for complex system
• Would require too many assumptions

10
ElectromechanicsPrevious Work

• Linked cores increases magnetic flux between
  coils
• Should increase change in flux through coils
• Greater flux change is proportional to induced
  voltage and power increases

11
Angular vs. Linear Magnet Model

• Small Displacement (4 deg, 3.75mm)

Note Difference in Analytical Models
12
Angular vs. Linear Magnet Model

• Medium Displacement (8 deg, 7.5mm)

Note Difference in Analytical Models
13
Angular vs. Linear Magnet Model

• Large Displacement (12 deg, 11.25mm)

Note Difference in Analytical Models
14
Angular vs. Linear Magnet Model

• Max Displacement (16 deg, 15mm)

Note Difference in Analytical Models
15
Parameters

• Belt Material Parameters
• Density, MOE
• Belt Configuration Parameters
• Length, Width, Thickness, Mag. Placement, Tension
• Power Generation Parameters
• Coil/Core Parameters, Gap, Magnet Parameters

16
Parameters Optimization and Selection

• Two or three parameters will be chosen for
  optimization
• All other parameters will be selected by
  mathematical method and/or available materials
• Final prototype design will also dictate
  selection to some extent

17
Parameters Likely Selections

• Most likely to be selected mathematically or due
  to availability
• Belt material
• Belt length
• Coil/core
• Magnet parameters

• Most likely to remain variable
• Belt width
• Thickness
• Tension
• Magnet placement
• Magnet gap

Goal Narrow parameters down just to belt width,
tension, and gap
18
Timeline Spring 2009
19
(No Transcript)