Exercise 4 - Practical Experiments
- Location: Engineering Learning Center, Cushing Hall
- First Lab Week (T:11/18 & W:11/19): The student will receive instruction on how to use the wind tunnel and its equipment. The student also will receive instruction on using a portable measurement system to determine the flow characteristics of a high-speed jet hand dryer.
- Second and Third Lab Weeks (11/24 ...): The student will use the portable measurement system (available for check-out from the Engineering Learning Center) to run hand dryer experiments on campus.*Note* The Learning Center will be closed from 5pm on Tuesday (11/24) to Monday (11/30) at 8am.
- Assignment: Technical Report due by 4pm, Friday, December 11.
Handouts, Procedures, and Guidelines
Technical Laboratory Exercise Handout
This is the handout that describes the laboratory exercise. Please review the handout before coming to lab the week of 11/17.
Week 1 Lab Procedure
This is the handout that describes the week 1 laboratory procedure. Directions for the LabView program used in the Learning Center are found here. Please review the handout before coming to lab the week of 11/17.
LaFortune hand dryer guidelines.
Please read over the guidelines for proper use of the Xcelerator hand dryers and bathroom facilities in LaFortune. Please print this document and take with you when gathering your hand dryer data.
Spec. Sheets
Pressure transducer that provides the pressure standard
Review this spec. sheet to learn about the pressure transducer that you will be using to calibrate the portable Setra PT . The spec. sheet is also handy for computing the error associated with the transducer.
Portable Setra PT
Review this spec. sheet to learn more about the Setra PT and the error associated with its use.
The Xcelerator!
Review this spec. sheet to learn more about the Xcelerator high speed hand dryer. For instance, what is its flow rate (given here in LFM)? How do your measurements compare to the manufacture's claims?
K-Type Thermocouple
Review and determine the accuracy of the k-type thermocouple.
Thermocouple module
Look over this spec. sheet to determine the error associated with the op-amp found in the thermocouple's temperature compensation module.
Additional Information
3D Polar plot for MATLAB
If you gathered your data for the hand dryer on a circular grid, you might want to click the above link. The link contains a .m file, documentation, and an example input that will help you see how to format your data. The example input is set up to represent data taken at different radii of a circle, that is, one point at five different radii, that represent that velocity from 0-360Deg. Once the .m file is in your working direct, type ''load V;polar3D(V,0,.4,0,2*pi,1) Read the .pdf to learn how it works. More programs are on Matlab Central (google Matlab central)
Bernoulli Equation Review
You may or may not have taken fluid mechanics at this point in your academic carreer, so, here is a helpful guide on the derivation of Bernoulli's equation. You will need Bernoulli's equation to convert your Pressure readings to Velocities.
2-D Numerical Integration
Two possible algorithms are described for computing the numerical approximation of a surface integral. This information will be helpful when determining the volumetric flow rate, Q. Other approaches are acceptable.
"Response of Pitot probes in turbulent streams"
Journal of Fluid Mechanics article about corrections to pitot probe measurements.
LEX-4 FAQ (Last modified 12/10/09)
Have a question about the lab, check here first! This is our answer to every "good" question that might be able to help another student down the line. We will try to update the FAQ whenever we receive a relevant question that might help everyone.
TA: Patrick Bowles
Office: B021 Hessert Lab
T:574-631-9397
C:610-751-6683
Email: pbowles@nd.edu
Office hours : Thurs : 3-5pm
Additional office hours can be made by appointment (just send me an email).
TA: Katie Thorne
Office: B026 Hessert Lab
T:574-631-8408
C:307-299-8370
Email: kthorne@nd.edu
Office hours : Thurs : 3-5pm
Additional office hours can be made by appointment (just send me an email).
Learning Center Hours
(when you may check out the lab equipment)
Monday - Thursday: 8am - 12am
Friday: 8am - 5pm
Sunday: 12pm - 12am
A lab monitor should be in the learning center at these hours.
If a monitor is not in the learning center when you arrive, please wait a few minutes for them to return.
If they do not show, send an email to Dr. Go, the TA's, and John Ott immediately.