<abstract xmlns="http://www.w3.org/1999/xhtml"><p>In the paper, the flow-through phenomena in the air gauge are under discussion form the thermodynamic and gasodynamic perspective. The main elements of the cascade are considered the inlet nozzle (restriction), measuring chamber and the measuring nozzle with the measuring slot (displacement between the nozzle head and measured surface). The purpose of the analysis was to point out the impact on the metrological characteristics of the air gauge. In particular, attention was paid to the airflow through the measuring slot. Here, the complex phenomena take place, among others the supersonic areas and a “bubble ring,” which cause discontinuity and hysteresis in the static characteristic. On the other hand, the air stream expansion after the restriction (inlet nozzle) is observed in the measuring chamber. The point of the above discussion was to work out some recommendation on the nozzles geometry and the localization of the back-pressure measuring point in the chamber.</p></abstract>

In the paper, the flow-through phenomena in the air gauge are under discussion form the thermodynamic and gasodynamic perspective. The main elements of the cascade are considered the inlet nozzle (restriction), measuring chamber and the measuring nozzle with the measuring slot (displacement between the nozzle head and measured surface). The purpose of the analysis was to point out the impact on the metrological characteristics of the air gauge. In particular, attention was paid to the airflow through the measuring slot. Here, the complex phenomena take place, among others the supersonic areas and a “bubble ring,” which cause discontinuity and hysteresis in the static characteristic. On the other hand, the air stream expansion after the restriction (inlet nozzle) is observed in the measuring chamber. The point of the above discussion was to work out some recommendation on the nozzles geometry and the localization of the back-pressure measuring point in the chamber.

Discussion on Flow-Through Phenomena in the Air Gauge Cascade

Division of Metrology and Measurement Systems, Faculty of Mechanical Engineering and Menagement, Poznan University of Technology, Piotrowo 3, 61-138 Poznań,

Acta Mechanica et Automatica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Discussion on Flow-Through Phenomena in the Air Gauge Cascade"}

In the paper, the flow-through phenomena in the air gauge are under discussion form the thermodynamic and gasodynamic perspective. The main elements of the...

Discussion on Flow-Through Phenomena in the Air Gauge Cascade

Published Online: Apr 04, 2017

Page range: 38 - 46

Received: Nov 03, 2015

Accepted: Mar 06, 2017

DOI: https://doi.org/10.1515/ama-2017-0006

Keywords
air gauges, static metrological properties, flow-through phenomena, pressure fluctuations

© 2017 Bialystok University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Discussion on Flow-Through Phenomena in the Air Gauge Cascade

Published Online: Apr 04, 2017

Page range: 38 - 46

Received: Nov 03, 2015

Accepted: Mar 06, 2017

DOI: https://doi.org/10.1515/ama-2017-0006

Keywordsair gauges, static metrological properties, flow-through phenomena, pressure fluctuations

© 2017 Bialystok University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
air gauges, static metrological properties, flow-through phenomena, pressure fluctuations