EXTENDING THE WORKING RANGE OF ACOUSTIC GAS THERMOMETRY

Result code in 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>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

EXTENDING THE WORKING RANGE OF ACOUSTIC GAS THERMOMETRY

Original language description

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.

Czech name

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Czech description

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Type

V_souhrn - Summary research report

CEP classification

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OECD FORD branch

20303 - Thermodynamics

Project

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

Continuities

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

Publication year

2021

Confidentiality

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

Number of pages

3

Place of publication

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Publisher/client name

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Version

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