Pneumatic gauge steady-state modelling by theoretical and empirical methods

Bókov, Vladimir B.

doi:10.1016/j.measurement.2009.01.015

Cited by 13 publications

(14 citation statements)

References 15 publications

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“…On the other hand, most of the existing models do not stay in conformity with measurement data and should be corrected with data obtained from experiments [10]. It indicates the need of accurate and reliable experimental setup to check the proposed theoretical models.…”

Section: Introductionmentioning

confidence: 95%

Comparison of the Models of the Air Gauge Static Characteristics

Jermak

Piątkowski

Dereżyński

et al. 2017

Archive of Mechanical Engineering

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In the article, the authors analyze and discuss several models used to the calculation of air gauge characteristics. The model based on the actual mass flow (which is smaller than the theoretical one) was proposed, too. Calculations have been performed with a dedicated software with the second critical parameters included. The air gauge static characteristics calculated with 6 different models were compared with the experimental data. It appeared that the second critical parameters model (SCP) provided the characteristics close to the experimental ones, with an error of ca. 3% within the air gauge measuring range.

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Section: Introductionmentioning

confidence: 95%

Comparison of the Models of the Air Gauge Static Characteristics

Jermak

Piątkowski

Dereżyński

et al. 2017

Archive of Mechanical Engineering

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“…The simple constructions require high accuracy of the feeding pressure stabilization. The value of the backpressure in the measuring chamber depends on the actual slot width (Bokov, 2011)and the pre-set dimensions of the inlet nozzle and measuring nozzle .…”

Section: Air Gauging Principlementioning

confidence: 99%

Discussion on Flow-Through Phenomena in the Air Gauge Cascade

Jermak

2017

Acta Mechanica Et Automatica

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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.

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“…Numerous matematical models have been applied to calculate the static characteristics of air gauges [13]. Each of them is based on the formulas of flow through the inlet nozzle and in the flapper-nozzle area [10].…”

Section: Flow Through Air Gauge Elementsmentioning

confidence: 99%

Static Characteristics of Air Gauges Applied in the Roundness Assessment

Jermak¹,

Rucki²

2016

Metrology and Measurement Systems

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In the article, analysis of the work conditions and the metrological characteristics of the air gauges dedicated for the roundness assessment is described. To reach the required accuracy of the acquired data, the phenomena of gas dynamics had to be analyzed in the whole flow through elements of the air gauge. A model based on the second critical parameters was used, because it reflects the true processes of the air flow. As a result, fast and accurate simulations provided series of the characteristics to be considered. Nevertheless, the chosen air gauge configuration underwent the experimental verification of its metrological characteristics. Finally, the entire measurement system Geoform with the gauge head based on the chosen air gauges underwent the accuracy test in order to make sure of its overall measurement quality.

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Pneumatic gauge steady-state modelling by theoretical and empirical methods

Cited by 13 publications

References 15 publications

Comparison of the Models of the Air Gauge Static Characteristics

Comparison of the Models of the Air Gauge Static Characteristics

Discussion on Flow-Through Phenomena in the Air Gauge Cascade

Static Characteristics of Air Gauges Applied in the Roundness Assessment

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