Rotating disc gauge for absolute total pressure measurement in high vacuum

1992 ◽  
Vol 10 (4) ◽  
pp. 2655-2660 ◽  
Author(s):  
A. Chambers ◽  
A. D. Chew ◽  
A. P. Troup
Keyword(s):  
Pressure Measurement ◽  
Total Pressure ◽  
High Vacuum ◽  
Rotating Disc

scholarly journals Total pressure measurement in extremely high vacuum region.

Shinku ◽  
1987 ◽  
Vol 30 (12) ◽  
pp. 968-973
Author(s):  
Toru KANAJI ◽  
Toshio URANO
Keyword(s):  
Pressure Measurement ◽  
Total Pressure ◽  
High Vacuum ◽  
Vacuum Region

Total Pressure Correction of a Sub-Miniature Five-Hole Probe in Areas of Pressure Gradients

2012 ◽  
Author(s):  
J. Town ◽  
A. Akturk ◽  
C. Camcı
Keyword(s):  
Pressure Measurement ◽  
Measurement Errors ◽  
Total Pressure ◽  
Pressure Gradients ◽  
Pressure Data ◽  
Flow Conditions ◽  
Complex Flow ◽  
Ducted Fan ◽  
The Difference ◽  
Best Fit

Five-hole probes, being a dependable and accurate aerodynamic tools, are excellent choices for measuring complex flow fields. However, total pressure gradients can induce measurement errors. The combined effect of the different flow conditions on the ports causes the measured total pressure to be prone to a greater error. This paper proposes a way to correct the total pressure measurement. The correction is based on the difference between the measured total pressure data of a Kiel probe and a sub-miniature prism-type five-hole probe. By comparing them in a ducted fan related flow field, a line of best fit was constructed. The line of best fit is dependent on the slope of the line in a total pressure versus span and difference in total pressure between the probes at the same location. A computer program, performs the comparison and creates the correction equation. The equation is subsequently applied to the five-hole probe total pressure measurement, and the other dependent values are adjusted. The validity of the correction is then tested by placing the Kiel probe and the five-hole probe in ducted fans with a variety of different tip clearances.

scholarly journals Determination of Vapor-Liquid Equilibrium from Total Pressure Measurement

1971 ◽  
Vol 14 (4) ◽  
pp. 252-256 ◽  
Author(s):  
Kunio Nagahama ◽  
Seijiro Suda ◽  
Toshikatsu Hakuta ◽  
Mitsuho Hirata
Keyword(s):  
Pressure Measurement ◽  
Total Pressure ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Vapor Liquid

Measurements of Entrainment on a Rotating Disc

1967 ◽  
Vol 71 (680) ◽  
pp. 587-587
Author(s):  
T. S. Cham ◽  
M. R. Head
Keyword(s):  
Boundary Layer ◽  
Velocity Distribution ◽  
Total Pressure ◽  
Rotating Disc ◽  
Free Air ◽  
Direct Measurements

In an earlier note Case reported direct measurements of entrainment on a rotating disc. More comprehensive measurements, made subsequently to those of Case and using essentially the same technique, are reported here. Two different sizes of drum were used in the present investigation, the flow within the drum in each case being smoothed by the use of a honeycomb and screens as well as a baffle at entry (see Fig. 1).The entrainment was also deduced from yawmeter and total pressure traverses through the boundary layer on the disc in free air, the integrated crossflow component of the velocity distribution through the layer evidently representing the entrainment up to the radius at which the traverses were performed. A typical measured crossflow profile is shown in Fig. 2.

Optimized MEMS Pirani sensor with increased pressure measurement sensitivity in the fine and high vacuum regime

2013 ◽  
Vol 31 (6) ◽  
pp. 061604 ◽  
Author(s):  
Friedemann Völklein ◽  
Mario Grau ◽  
Andreas Meier ◽  
Grit Hemer ◽  
Lars Breuer ◽  
...  
Keyword(s):  
Pressure Measurement ◽  
High Vacuum ◽  
Measurement Sensitivity ◽  
Increased Pressure

scholarly journals Extremely-high vacuum system for the pressure measurement using the laser-ionization method.

Shinku ◽  
1991 ◽  
Vol 34 (1) ◽  
pp. 14-16 ◽  
Author(s):  
Kiyohide KOKUBUN ◽  
Hazime SHIMIZU ◽  
Shingo ICHIMURA ◽  
Humio KAWAHARA ◽  
Minoru KONDO
Keyword(s):  
Pressure Measurement ◽  
High Vacuum ◽  
Vacuum System ◽  
Laser Ionization ◽  
Ionization Method
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