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Fluid Mechanics Lab Wind Turbine Project

This is a presentation for Spring 2010 for efficeincy of wind turbines by means of experimentation on miniture hand made wind turbines
by

Jessica Hunnicutt

on 3 May 2010

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Transcript of Fluid Mechanics Lab Wind Turbine Project

Wind Turbine ME/CE 319 - Fluid Mechanics Lab Created By:
Brett Conrad
Christopher Gerardot
Jessica Hunnicutt
James Stoller
Devin Webster Objective Design, build, test & improve the performance of a miniature wind turbine Compressed Air from Classroom
Pressure Regulator
Air Hose
Clamp
Angle Iron Start with building kit
Make improvements
Preform various experiments
Find efficiencies and inefficiencies
Compare to theoretical Test Kit Improvements
Sturdier support system
Sturdier blades
Bigger blades
Improved voltage measurements
Air source with more speeds Rubber band attached to ruler

Voltmeter takes measurement

Blades cunstructed of bent paperclips

Cardboard blades
Fan or hairdryer for air source Voltmeter
Data Aquistion System (DAQ) LabView DAQ Front Panel and Block Diagram With activity kit method,
One reading at a time
One type of measurement (voltage or resistance)

Measurement Devices - OR - DAQ
Takes hundreds of measurements in short amount of time
Takes voltage and resitance simultaneous
Designs James's Wind Turbine (JAWT) Four blade wind turbine
Blades constructed of 10" x 3" posterboard
Erector set for rotor assembly
Half of an Easter egg for aerodynamics Erector Set Stand
Vibrated
Rotor assembly no parallel with air flow Wood post
Wood plank for rotor extension
Classroom stool for elevation
Orginally Solution Jessica's Wind Turbine (JEWT) Rutter Fin
Carboard nacelle
Pre-made 3-blade propellor
Ball bearing for rotating nacelle
Modeled after modern wind turbine design Materials
1-1/4" PVC pipe tower
PVC fitting
Metal flange
Scrap laminate flooring
4- Bolts
2- Binding posts
18" of doorbell wire
Small cardboard core of duct tape
DC craft motor
Originally Solution Pre-made propellor
No variation of pitch (or angle of attack)
Ball bearing
Tremendous shaking of nacelle in high wind
Glued nacelle directly to tower
Created new rotor
Cork as main hub
Model helicopter blades
Small metal shaft for each blade attachment
Glue in angled positons
Previous & Mechnical
Experience Acknowledge teacher's set-up works
Takes up valueable time
Done previously by group members

Skipping this step would:

Increase available time toward improvements section
More time for efficiency studies Air Source Improving Performance Vary Pitch
Wind Speed
Solidity
Geometry Power Angle of Attack (or Pitch) 45 to 70 degrees in 5 degree increments Wind Speed ~ ~ ~ ~ Measure with anemometer
Units of meters per second
Measured in front of turbine Brett with JEWT James with JAWT Solidity JAWT is the only turbine for this variation
Reduce surface area of blades 1.) Create template
2.) Cut holes
3.) Test Pattern Silhouette SD Craft Cutter Compass Cutter Geometry - Comparing blade shape - Helicopter Airfoil

vs

Flat Paddle Results Theory Actuator disk in control volume
Wind speed before entering turbine 'V'
Decelerates to 'V(1-a)'just before turbine
Decelerates to 'V(1-2a)' after leaving turbine
'a' is the interference factor Efficiency Range of Various Turbines Calculations Conclusion Recommendation Energy from the Wind Any Questions? JAWT and JEWT have low efficiencies Could be due to lack of even distribution of air flow on blades In hindsight, more effective to find average velocity Size difference Blades Use JEWT at
65 degree angle of attack





Use JAWT at
70 Degree angle of attack - When air speed is less than 3.5 m/s
- When air speed is higher than 3.5m/s
switch to 70 angle of attack - During all wind speeds
- No angle adjustment needed
- Full solidity (100%)
Full transcript