The Development of Multi-element Temperature Sensors for a Compressible Fluid Flow Velocity Measurement

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The Development of Multi-element Temperature Sensors for a Compressible Fluid Flow Velocity Measurement

Popis výsledku v původním jazyce

When measuring the temperature of a stream of compressible fluid using a temperature sensor, experimenters must address the problem of the effect of the compressibility of the locally decelerated fluid in the near neighborhood of the sensor on the rendered temperature. Generally said, the temperature rendered by a temperature probe positioned within an airflow depends on the external flow velocity, the specific heat of the fluid, the thermodynamic temperature, and the recovery factor of the probe. A method of measuring the velocity of a flowing compressible fluid that takes advantage of these properties is called Recovery Temperature Anemometry (RTA). This, unfortunately, means there are two unknown properties in real-time measurements – the velocity and the thermodynamic temperature of the fluid. This article is focused on a possible solution to the mentioned problem and the development of appropriate probes. By using two probes with different recovery factors, the need for knowing the thermodynamic temperature is eliminated so that a combination of two temperature probes with different recovery factors can be used for the velocity measurement. As described in this paper, by using multiple temperature sensors with different recovery factors, the temperature of the flowing fluid can be eliminated, leaving only one unknown quantity in the entire problem, which is the velocity of the flowing fluid. The article describes the theoretical basis of the problem, the purpose of multi-element probe, the verification multi-element temperature probe behavior, the measurement technique, and the results.

Název v anglickém jazyce

The Development of Multi-element Temperature Sensors for a Compressible Fluid Flow Velocity Measurement

Popis výsledku anglicky

When measuring the temperature of a stream of compressible fluid using a temperature sensor, experimenters must address the problem of the effect of the compressibility of the locally decelerated fluid in the near neighborhood of the sensor on the rendered temperature. Generally said, the temperature rendered by a temperature probe positioned within an airflow depends on the external flow velocity, the specific heat of the fluid, the thermodynamic temperature, and the recovery factor of the probe. A method of measuring the velocity of a flowing compressible fluid that takes advantage of these properties is called Recovery Temperature Anemometry (RTA). This, unfortunately, means there are two unknown properties in real-time measurements – the velocity and the thermodynamic temperature of the fluid. This article is focused on a possible solution to the mentioned problem and the development of appropriate probes. By using two probes with different recovery factors, the need for knowing the thermodynamic temperature is eliminated so that a combination of two temperature probes with different recovery factors can be used for the velocity measurement. As described in this paper, by using multiple temperature sensors with different recovery factors, the temperature of the flowing fluid can be eliminated, leaving only one unknown quantity in the entire problem, which is the velocity of the flowing fluid. The article describes the theoretical basis of the problem, the purpose of multi-element probe, the verification multi-element temperature probe behavior, the measurement technique, and the results.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20303 - Thermodynamics

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of Abstracts 39th Meeting of Departments of Fluid Mechanics and Thermodynamic

ISBN

978-80-248-4557-9

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

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Název nakladatele

VŠB - Technical University of Ostrava

Místo vydání

Ostrava

Místo konání akce

Hotel Duo, Horní Bečva

Datum konání akce

13. 10. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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