Temperature maps measurements on 3D surfaces with infrared thermography |
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Authors: | Email author" target="_blank">Gennaro?CardoneEmail author Andrea?Ianiro Gennaro?dello Ioio Andrea?Passaro |
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Institution: | (1) Department of Aerospace Engineering (DIAS), University of Naples Federico II, Via Claudio 21, 80125 Naples, Italy;(2) BP Institute for Multiphase Flow, University of Cambridge, Cambridge, England, CB3 0EZ, UK;(3) Alta SpA, 56014 Ospedaletto, PI, Italy |
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Abstract: | The use of the infrared camera as a temperature transducer in wind tunnel applications is convenient and widespread. Nevertheless,
the infrared data are available in the form of 2D images while the observed surfaces are often not planar and the reconstruction
of temperature maps over them is a critical task. In this work, after recalling the principles of IR thermography, a methodology
to rebuild temperature maps on the surfaces of 3D object is proposed. In particular, an optical calibration is applied to
the IR camera by means of a novel target plate with control points. The proposed procedure takes also into account the directional
emissivity by estimating the viewing angle. All the needed steps are described and analyzed. The advantages given by the proposed
method are shown with an experiment in a hypersonic wind tunnel. |
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Keywords: | |
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