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Development of a high frequency response temperature sensor for turbulent flow based on a cold wire / Emmanuel Gillyns 

Public ISBD Titre : Development of a high frequency response temperature sensor for turbulent flow based on a cold wire Type de document : Travail de fin d'études Auteurs : Emmanuel Gillyns, Auteur ; Sophia Buckingham, ; Patrick Hovine, Editeur : ECAM Année de publication : 2019 Note générale : von KARMAN Institute for Fluid Dynamics Langues : Anglais (eng) Index. décimale : TFE - Electromécanique Résumé : The measurement in temperature is fundamentally essential in any fluid dynamics experiments involving heat transfer. Both mean and fluctuating quantities need to be measured with precision for most applications. Currently the most commonly used temperature measurement technique is a thermocouple, capable of identifying temperature fluctuations up to 75Hz. In a turbulent flow, thermal energy content can easily reach the order of a few kHz, requiring a new sensor with greater frequency response. The aim here is to create this sensor based on a resistive wire. The temperature being proportional to the resistance of the wire, by measuring it, the corresponding temperature can be calculated. The design of this sensor need to take into account multiple factors such as the mechanical and electrical properties, as well as the expected time resolution properties. For this sensor to be able to capture a frequency higher than the design proposed, a digital lead-lag compensation can be studied to get a higher frequency range. Development of a high frequency response temperature sensor for turbulent flow based on a cold wire [Travail de fin d'études] / Emmanuel Gillyns, Auteur ; Sophia Buckingham, ; Patrick Hovine,  . - ECAM, 2019. von KARMAN Institute for Fluid Dynamics Langues : Anglais (eng) Index. décimale : TFE - Electromécanique Résumé : The measurement in temperature is fundamentally essential in any fluid dynamics experiments involving heat transfer. Both mean and fluctuating quantities need to be measured with precision for most applications. Currently the most commonly used temperature measurement technique is a thermocouple, capable of identifying temperature fluctuations up to 75Hz. In a turbulent flow, thermal energy content can easily reach the order of a few kHz, requiring a new sensor with greater frequency response. The aim here is to create this sensor based on a resistive wire. The temperature being proportional to the resistance of the wire, by measuring it, the corresponding temperature can be calculated. The design of this sensor need to take into account multiple factors such as the mechanical and electrical properties, as well as the expected time resolution properties. For this sensor to be able to capture a frequency higher than the design proposed, a digital lead-lag compensation can be studied to get a higher frequency range.

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