SUBSONIC TESTS IN FREE MOLECULE FLOW ON IMPACT TUBE PRESSURE PROBES HAVING A WIDE RANGE OF TUBE LENGTHS AT ANGLES OF ATTACK UP TO 90 DEGREES.
Abstract
Subsonic tests were performed in the UTIAS low density wind tunnel to obtain data on the free molecule properties of impact tube pressure probes at subsonic speeds over a wide range of tube lengths. The data substantiated recent theoretical calculations. For non-zero angles of attack it was found that the probe pressure ratio can be approximated by assuming that the probe is at zero angle of attack to the axial component of the speed ratio. This approximation will yield a value which is too high and will be more in error as either the speed ratio or the impact tube length/diameter ratio is increased. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1965
- Accession Number
- AD0475736
Entities
People
- P. C. Hughes
Organizations
- University of Toronto