Fall 2008
Laboratory #5: Unsteady Velocity Measurements in a Jet
Using a Laser Doppler Velocimeter
A formal report
is required for this laboratory. Please follow the instructions for formal
report formats carefully, and include the items listing in the Additional
Instructions.
Additional Instructions
After you are done acquiring axial velocity data, rotate the
transceiver by 90 degrees and attemp to acquire vertical velocity
component data (at least) somewhere in the shear layer of the jet.
Note, you will need to adjust the Bandpass Filter and Downmix settings
to account for the fact that: 1) the vertical velocities are less than
the axial velocities and 2) the vertical velocity can be both upward
and downward.
The "Error
Analysis" section should
include
a quantitative analysis of the measurement errors (systematic, random,
and combined) in as far as the
information available to you allows. You may assume that the
beam spacing uncertainty is +/- 0.25 mm and the lens focal length
uncertainty is +/- 1 mm.
Questions
Please include answers to the following questions in the appropriate
sections in your report:
- .