Fluctuating temperature measurement by a fine-wire thermocouple probe: influences of physical properties and insulation coating on the frequency response

Autor:	K Kato, Kazuhide Kaifuku, Masato Tagawa
Rok vydání:	2007
Předmět:	Frequency response Materials science Water flow Turbulence Applied Mathematics Airflow Thermodynamics Mechanics Thermal conduction Temperature measurement Flow measurement Thermocouple Instrumentation Engineering (miscellaneous)
Zdroj:	Measurement Science and Technology. 18:779-789
ISSN:	1361-6501 0957-0233
DOI:	10.1088/0957-0233/18/3/030
Popis:	Theoretical analysis of the frequency response of a fine-wire thermocouple probe has been further developed to investigate influences of the difference in physical properties between the two wires composing a butt-welded fine-wire thermocouple. The solution obtained demonstrates complex behaviour of the frequency response of the copper–constantan (type-T) thermocouple whose physical properties differ greatly between the two constitutive wires. It was also shown that, in an air flow, the frequency response is almost uniform in the cross-section of the thermocouple wire, but, in a water flow, it becomes remarkably nonuniform. The present theoretical analysis provides useful information for improving the reliability of fluctuating temperature measurement in high-temperature turbulent flows.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bbf8176a522d13875e6cd57950cbb400 https://doi.org/10.1088/0957-0233/18/3/030 Zobrazit plný text záznamu