1 / 13

Advanced Energy Vehicle

Advanced Energy Vehicle. Lab 07: System Analysis 3 (Wind Tunnel Testing). Piaggio Avanti!.

keita
Download Presentation

Advanced Energy Vehicle

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Advanced Energy Vehicle Lab 07: System Analysis 3 (Wind Tunnel Testing)

  2. Piaggio Avanti! Fun Fact: The P.180 Piaggio Avanti’s wings, canard and propeller were designed and tested at The Ohio State University helping make this plane one of the world’s most efficiency propeller driven planes in the world! These tests were similar to the ones that will be conducted in today’s lab!

  3. FINAL DESIGN AEV Project Objective (Problem Definition) Initial Concepts (Brainstorming) experimental Research (Programming) (System Analysis) PT 1 PT 2 PT 3 PT 4 Present AEV Design

  4. Lab Objectives/Goals • The objectives of this lab are: • Become familiar with propulsion system efficiency • Become familiar with wind tunnel testing equipment • How to relate AEV to real-life objects • How to link wind tunnel testing to the AEV

  5. Propulsion Efficiency • Does input power supplied to the motors equal the output power generated by the electric motors and propeller? Input power = Power supplied to the vehicle’s propulsion system Output power = Power generated by the electric motors and propellers

  6. Power Input Power • Independent variable: Current Output Power (or Power Available) • Dependent variables: Propeller RPM and the AEV’s velocity

  7. Units • Output Power is a Mechanical System • Typical Units are: ??? • Hint: when you ask for a car’s power is it given in units of … ?? • Input Power is an Electrical System • Typical Units are: ??? • Hint: when you look up your light bulb’s power, it is given in units of … ?? Answer: Horsepower Answer: Watts • Watts does NOT equal horsepower so the need to convert horsepower to watts using the AEV Lab Manual

  8. Advance Ratio • Since Power Output (Available) is a function of two independent variables, a new non-dimensional parameter was created to related all the variables using Buckingham Pi Theorem • This non-dimensional parameter is called Advanced Ratio and is commonly used in Aerospace Engineering:

  9. How does this relate to AEV? • Looking at a plot of Propulsion Efficiency vs Advance Ratio Increasing Voltage • How does voltage affect the propulsion efficiency • RPM is directly proportional to voltage

  10. How does this relate to AEV? • Looking at a plot of Propulsion Efficiency vs Advance Ratio • Where is the 2 volts A or B? • 2 volts divided by a 7.4 volt battery is approximately equivalent to 27% MotorSpeed B A

  11. Configuration Selection Thrust Line Thrust Line Pusher Configuration Puller (Tractor) Configuration • Looking back at Piaggio Avanti back on the second slide, what is its configuration? Answer: Pusher! • Also look at the affect of the two sides of the propeller, there is a right and wrong way to put on a propeller!

  12. Questions to think about . . . • Things to think about during the Lab: • How do the values you obtain for power available of the AEV’s motors compare to a typical car? Are the values reasonable? • How do the values you obtain for input power of the AEV compare to a household light bulb? Are the values reasonable? • What is the advance ratio needed to obtain the highest efficiency and how does that relate to power needed? • Do all propellers have the same performance for all voltages/configurations?

  13. Questions?

More Related