Calibration of the Reference Velocity in the Test Section of the Low Speed Wind Tunnel at the Aeronautical and Maritime Research Laboratory
Abstract
The measurement of wind velocity in the test section of the Low Speed Wind Tunnel is obtained from the measurement of dynamic pressure using two piezometer rings located at the entrance and exit of the tunnel contraction. Following the recent installation of a new contraction, a calibration of the dynamic pressure measurement system was performed to determine a new wind tunnel calibration' factor. This factor is applied as a correction to the pressure measurements obtained from the two piezometer rings to represent accurately the correct dynamic pressure and consequently, velocity, at the centre of the test section midway between the centres of the turntables in the floor and ceiling. A substandard pitot-static probe was used to acquire pressure data at various positions within the wind tunnel test section for a range of velocities. The new tunnel calibration factor, representative of all wind speeds, was determined to be 1.079, an increase of 3.3% over the factor of 1.045 for the previous contraction. This report contains all of the test data and a detailed account of the procedure and equipment used to derive this new calibration factor.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 2000
- Accession Number
- ADA377313
Entities
People
- Craig D. Edwards
Organizations
- Defence Science and Technology Group