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Visualization of Ambient Mass Spectrometry with the Use of Schlieren Photography
Published on: June 20, 2016
Temperature Measurement of Fluid Flows by Using a Focusing Schlieren Method
A Martínez-González1,2, D Moreno-Hernández3, J A Guerrero-Viramontes4
1Depto. de Ingeniería Robótica, Universidad Politécnica del Bicentenario, Carr. Silao-Romita Km 2, San Juan de los Duran, C.P. 36283 Silao, Guanajuato, Mexico. amartinezg@upbicentenario.edu.mx.
Abstract:
A method for measuring planar temperature fields of fluid flows is proposed. The focusing schlieren technique together with a calibration procedure to fulfill such a purpose is used. 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. The experimental values of temperature measurements are in agree with those measured using a thermocouple.
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