Preprint Article Version 1 This version is not peer-reviewed

Temperature Measurement of Fluids Flow by Using a Focusing Schlieren Method

Version 1 : Received: 17 November 2018 / Approved: 19 November 2018 / Online: 19 November 2018 (10:58:10 CET)

A peer-reviewed article of this Preprint also exists.

Martínez-González, A.; Moreno-Hernández, D.; Guerrero-Viramontes, J.A.; León-Rodríguez, M.; Zamarripa-Ramírez, J.C.I.; Carrillo-Delgado, C. Temperature Measurement of Fluid Flows by Using a Focusing Schlieren Method. Sensors 2019, 19, 12. Martínez-González, A.; Moreno-Hernández, D.; Guerrero-Viramontes, J.A.; León-Rodríguez, M.; Zamarripa-Ramírez, J.C.I.; Carrillo-Delgado, C. Temperature Measurement of Fluid Flows by Using a Focusing Schlieren Method. Sensors 2019, 19, 12.

Journal reference: Sensors 2018, 19, 12
DOI: 10.3390/s19010012

Abstract

In this work, we propose a method to measure planar temperature fields of fluids flow. We used a focusing schlieren technique together with a calibration procedure to fulfill such purpose. The focusing schlieren technique uses an off-axis circular illumination to reduce the depth of focus of the optical system. The calibration procedure is based on the relation of the intensity level of each pixel of a focused schlieren image to the corresponding cutoff grid position measured at the exit focal plane of the schlieren lens.  The method is applied to measure planar temperature fields of the hot air issuing from a 10 mm diameter nozzle of a commercial Hot Air Gun Soldering Station Welding. Our tests are carried out at different temperature values and different planes along the radial position of the nozzle of the Hot Air Gun Soldering Station Welding. The temperature values obtained experimentally are in agreed with those obtained with a thermocouple.

Subject Areas

focusing schlieren; temperature; measurements

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