Effects of Pressure-Rake Design Parameters on Static-Pressure Measurement for Rakes Used in Subsonic Free Jets
Abstract
A subsonic-free-jet investigation was conducted to determine the effect of pressure-rake design parameters on static-pressure measurement. The design parameters investigated include the location of the static orifices in relation to the tube nose and supporting strut, the proximity effects of adjacent tubes near the static orifices, and the effect of the ratio of support diameter to jet diameter. The investigation covered a Mach number range of 0.3 to 0.95. Results of the investigation revealed that the effect of variation in the distance from the leading edge of the static-pressure tube to the static orifices was small compared with the effect of variation of the distance from the static orifices to the supporting strut. The effect of variation in the ratio of support diameter to jet diameter became pronounced at high velocities. Proximity effects of adjacent tubes near static-pressure tubes may be alleviated by proper orientation of the leading edge of the adjacent tube in relation to the static orifices. Information and recommendations are provided for the design of pressure rakes to be used in subsonic free jets.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1951
- Accession Number
- ADA380523
Entities
People
- Lloyd N. Krause
Organizations
- National Aeronautics and Space Administration