EXTENDING THE WORKING RANGE OF ACOUSTIC GAS THERMOMETRY

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F21%3AN0000045" target="_blank" >RIV/00177016:_____/21:N0000045 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

EXTENDING THE WORKING RANGE OF ACOUSTIC GAS THERMOMETRY

Popis výsledku v původním jazyce

The RMG researcher initially received basic education into the theory of physical acoustics and the laboratory methods needed to conduct tests with an apparatus designed to implement acoustic gas thermometry (AGT) by measuring speed of sound in gases up to moderately high temperatures and pressures (700 K, 1 MPa). Following initial training, the RMG researcher collaborated to the assembly and test of several components of the experiment, including vacuum and pressure tests of the tightness of a furnace and a pressure vessel, and the performance of different types of acoustic transducers and waveguides. These preliminary tests used argon as the thermometric gas at temperatures up to 70 °C. The RMG researcher also set novel software tools used for the analysis and correction of acoustic data. A second experimental test with Ar was later conducted up to 550 K, intended to record acoustic data at several pressures along an isotherm between 100 kPa and 800 kPa. During this test, a major gas leak from the internal vessel to the furnace compromised the experimental run due to a short-circuit which caused damages to the microphonics and pressure measuring instrumentation. In spite of these issues, which compromised the full completion of the research initially scheduled in Task 2, the analysis of acoustic data at 550 K up to 230 kPa showed, by comparison of speed of sound data from three different radial modes, that the acoustic performance of the AGT was satisfactory. All things considered, the research activities in the course of the RMG met their target. A detailed account of these results and activities is being published as an INRiM Technical Report and will be reported at the next meeting of the parent JRP, Real-K, in March 2022.

Název v anglickém jazyce

EXTENDING THE WORKING RANGE OF ACOUSTIC GAS THERMOMETRY

Popis výsledku anglicky

The RMG researcher initially received basic education into the theory of physical acoustics and the laboratory methods needed to conduct tests with an apparatus designed to implement acoustic gas thermometry (AGT) by measuring speed of sound in gases up to moderately high temperatures and pressures (700 K, 1 MPa). Following initial training, the RMG researcher collaborated to the assembly and test of several components of the experiment, including vacuum and pressure tests of the tightness of a furnace and a pressure vessel, and the performance of different types of acoustic transducers and waveguides. These preliminary tests used argon as the thermometric gas at temperatures up to 70 °C. The RMG researcher also set novel software tools used for the analysis and correction of acoustic data. A second experimental test with Ar was later conducted up to 550 K, intended to record acoustic data at several pressures along an isotherm between 100 kPa and 800 kPa. During this test, a major gas leak from the internal vessel to the furnace compromised the experimental run due to a short-circuit which caused damages to the microphonics and pressure measuring instrumentation. In spite of these issues, which compromised the full completion of the research initially scheduled in Task 2, the analysis of acoustic data at 550 K up to 230 kPa showed, by comparison of speed of sound data from three different radial modes, that the acoustic performance of the AGT was satisfactory. All things considered, the research activities in the course of the RMG met their target. A detailed account of these results and activities is being published as an INRiM Technical Report and will be reported at the next meeting of the parent JRP, Real-K, in March 2022.

Druh

V_souhrn - Souhrnná výzkumná zpráva

CEP obor

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OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/8B19006" target="_blank" >8B19006: Realising the redefined kelvin</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Počet stran výsledku

3

Místo vydání

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Název nakladatele resp. objednatele

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Verze

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