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

scholarly journals Device for calibration of low pressure gauges development

2002 ◽  
Vol 2 (4) ◽  
pp. 189-195
Author(s):  
Z.D. Nikitovic
Keyword(s):  
High Vacuum ◽  
Low Pressure ◽  
Calibration Procedure ◽  
Vacuum System ◽  
Molecular Collision ◽  
Gas Discharges ◽  
Dry Air ◽  
Vacuum Region ◽  
Set Up ◽  
Made In

Vacuum system set-up is presented and used for calibration of pressure gauges in the region of rough vacuum, from 103 mbar to 10-1 mbar, with dry air. The capacitance manometer is used for the calibration of piezoresistant manometer, oil, mercury and mercury micrometers U manometers. The applicability of the experimental set-up and obtained results for the low pressure gauges calibration in the medium and high vacuum region is approved. It was shown how calibration of some cheaper pressure gauges might be performed and reliable measurements of the pressure may be made in the region that is of interest for atomic and molecular collision physics and low-pressure gas discharges. It was also shown that mentioned calibration procedure could be used for calibration of different U manometer types in order to renormalize older atomic and molecular collision data.

Measurement of partial pressures in extremely high vacuum region using a modified residual gas analyzer

1999 ◽  
Vol 70 (3) ◽  
pp. 1880-1884 ◽  
Author(s):  
Shu Watanabe ◽  
Hitoshi Oyama ◽  
Shigeki Kato ◽  
Masakazu Aono
Keyword(s):  
High Vacuum ◽  
Gas Analyzer ◽  
Vacuum Region ◽  
Partial Pressures ◽  
Residual Gas

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
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