Measurement of the gas flow stagnation temperature by the method of two identical thermocouples in the short-duration aerodynamic facilities

Tsyryulnikov, I. S.; Komarov, V.I.; Маслов, А. А.

doi:10.1016/j.flowmeasinst.2020.101863

Cited by 7 publications

(1 citation statement)

References 13 publications

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“…The amount of heat transferred from the medium to the solid body will be determined by the convective heat transfer coefficient , which depends on the Reynolds criterion, the geometric parameters of the thermo transducer and the parameters of the gas flow. According to the results of many studies [2], [8] and according to the authors' research, at subsonic flow velocities in the range of Re change from 100 to 10,000, the following empirical dependencies characterizing the heat exchange between the thermo transducer and the gas flow can be recommended:  for round cylindrical thermo transducers that are transversely washed by the flow Nu = (0.44  0.06)Re 0.5 , (…”

Section: Methods Of Influence On the Error Component Due To Heat Exch...mentioning

confidence: 99%

Optimization of Thermal Subsystem of Thermo Transducers for Measuring the Temperature of Gas Flows

Fedynets¹,

Vasylkivskyi²

2022

Energy eng. control syst.

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The error of measuring the temperature of gas flows by contact methods consists of two main components: 1) the error that occurs in the process of measuring the physical quantity into which the temperature is converted (the error of the measuring means); 2) errors arising in the process of converting the temperature into a measured physical value using a thermo transducer. This component of the error is completely thermal in nature and is determined by the conditions of the thermal balance between the studied gas flow and the thermo transducer and has the greatest impact on the overall measurement error. It is determined by the combined action of the following factors: heat transfer due to radiation to or from the thermo transducer; heat removal from thermo transducer due to thermal conductivity; by converting part of the kinetic energy of the gas flow into thermal energy in the wall layer surrounding the thermo transducer; by convective transfer of heat from the wall layer to the sensitive element of the thermo transducer. Note also that if the temperature of the gas flow is non-stationary, then due to the thermo transducer's own heat capacity, it does not have time to register the time-varying temperature of the flow. Due to this, a dynamic component of the measurement error arises during the measurement of non-stationary temperatures. The article investigates the component error determined by the conditions of heat exchange between the gas flow and the thermo transducer.

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Section: Methods Of Influence On the Error Component Due To Heat Exch...mentioning

confidence: 99%

Optimization of Thermal Subsystem of Thermo Transducers for Measuring the Temperature of Gas Flows

Fedynets¹,

Vasylkivskyi²

2022

Energy eng. control syst.

View full text Add to dashboard Cite

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Methodology for the application of velocimetry by molecular tagging of hypersonic flows

Vialta

Matos²,

Barreta³

et al. 2022

Flow Measurement and Instrumentation

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Cryogenic to high temperature measurements in gas flows by femtosecond laser-induced CN luminescence

Han,

Gao,

et al. 2024

Measurement

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Measurement of the gas flow stagnation temperature by the method of two identical thermocouples in the short-duration aerodynamic facilities

Cited by 7 publications

References 13 publications

Optimization of Thermal Subsystem of Thermo Transducers for Measuring the Temperature of Gas Flows

Optimization of Thermal Subsystem of Thermo Transducers for Measuring the Temperature of Gas Flows

Methodology for the application of velocimetry by molecular tagging of hypersonic flows

Cryogenic to high temperature measurements in gas flows by femtosecond laser-induced CN luminescence

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