1. First-Year Engineering Program Advanced Energy Vehicle System Analysis 3 Reference:  AEV Lab Manual  System Analysis 3 Grading Guidelines

2. First-Year Engineering Program AEV Project Objective (Problem Definition) INITIAL CONCEPTS (Brainstorming) EXPERIMENTAL RESEARCH ANALYZE DESIGN DECISION RESEARCH COMPARE FINAL DESIGN Present AEV Design PT 1 PT 2 PT 3 PT 4 (System Analysis)(Programming)

3. First-Year Engineering Program Lab Objectives  The objectives of this lab are: 1.Become familiar with propulsion system efficiency. 2.Become familiar with the wind tunnel and thrust stand equipment. 3.Conduct wind tunnel testing on electric motor and propeller. 4.Conduct analysis of wind tunnel testing results. 5.Update propulsion efficiency performance characteristics.

4. First-Year Engineering Program Equipment AEV User Manual – System Analysis 3 Power Supply (Motor Controller) Wind Tunnel Speed Controller Thrust Stand Data Acquisition (DAQ) System Thrust Stand

5. First-Year Engineering Program Lab Goal AEV User Manual – System Analysis 3  The goal is to determine how efficient the propulsion system is by 1.Setting the input power supplied to the motor, and 2.Measuring the power output generated by the electric motor and propeller

6. First-Year Engineering Program AEV Energy Analysis AEV User Manual – System Analysis 3  Recall that the propulsion efficiency of the AEV velocity and propeller RPM (or the non- dimensional propeller advance ratio parameter)  Therefore, we need to be able to control both AEV velocity and propeller RPM throughout a range in order to determine the efficiency characteristics of the propulsion system!  How can we do this!?!

7. First-Year Engineering Program AEV Energy Analysis AEV User Manual – System Analysis 3  Wind Tunnel!  We will use a wind tunnel to set the simulated AEV velocity and range the propeller RPM!

8. First-Year Engineering Program AEV Energy Analysis AEV User Manual – System Analysis 3  Make sure to follow the Lab Manual carefully to set up the proper configuration for your AEV  i.e. Puller (Tractor) or Pusher configuration  See next slides

9. First-Year Engineering Program Configuration Selection Puller (Tractor) ConfigurationPusher Configuration In the lab procedure, take careful notice to; propeller orientation on the electric motor motor power supply wiring

10. First-Year Engineering Program Proper Propeller Orientation For either Puller or Pusher Configuration - When looking at the propeller (i.e. AEV) from the front (strain gauge base): The propeller number designation should be visible The propeller should be rotating counter-clockwise Visual Confirmation of Propeller Orientation Propeller number designation Counter-clockwise rotation

11. First-Year Engineering Program AEV Energy Analysis AEV User Manual – System Analysis 3  You will be setting the power supplied (input) using the power supply and recording the voltage and current supplied to the motor.  Where V is the voltage

12. First-Year Engineering Program AEV Energy Analysis AEV User Manual – System Analysis 3  You will be using the thrust stand to measure the thrust of the propulsion system  And wind tunnel velocity to calculate Power Available (output) Strain Gauge + Thrust Direction Motor Mount Motor Set Screw

13. First-Year Engineering Program AEV Energy Analysis AEV User Manual – System Analysis 3  Once testing is complete and the power supplied and available is recorded and calculated, you can determine the propulsion system efficiency for your AEV motor and props

14. First-Year Engineering Program AEV Energy Analysis AEV User Manual – System Analysis 3  The efficiency can be related to the non- dimensional parameter from the known wind tunnel velocity set and the variable RPM  The RPM for the tunnel testing, as function of the supplied voltage, can be determined with the following trends:

15. First-Year Engineering Program System Analysis 3 Lab Lab Activity  Follow AEV Lab Manual and Lab Procedure Guidelines  Team:  Print hard copy of the Wind Tunnel Testing Results spreadsheet  Select propeller and motor configuration  Conduct wind tunnel tests through voltage range (2.5V – 6V)  Individual:  Record data into the Wind Tunnel Testing Results spreadsheet  Analyze results