First-Year Engineering Program

Advanced Energy Vehicle

System Analysis 3

Reference: AEV Lab Manual System Analysis 3 Grading

Guidelines

First-Year Engineering ProgramAEV Project Objective(Problem Definition)

INITIAL CONCEPTS(Brainstorming)

EXPERIMENTAL RESEARCH

ANALYZE

DESIGN DECISION

RESEARCH

COMPARE

FINAL DESIGN

Present AEV Design

PT 1PT 2PT 3PT 4

(System Analysis)(Programming)

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.

First-Year Engineering Program

EquipmentAEV User Manual – System Analysis 3 Power Supply

(Motor Controller)

Wind TunnelSpeed Controller

Thrust Stand Data Acquisition (DAQ) System

Thrust Stand

First-Year Engineering Program

Lab GoalAEV 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

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!?!

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!

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

First-Year Engineering Program

Configuration Selection

Puller (Tractor) Configuration Pusher Configuration

In the lab procedure, take careful notice to;• propeller orientation on the electric motor• motor power supply wiring

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-clockwiserotation

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

IVPin

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 tunnelvelocity to calculate Power Available (output)

Strain Gauge

+ Thrust Direction

Motor Mount

Motor Set Screw

vTPout

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

%100in

outsys P

P

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:

29.923390

3.26498.1657

2

3

VRPM

VRPM

inch

inch

First-Year Engineering Program

System Analysis 3 LabLab 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