ISPRS-Archives The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ISPRS-Archives Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci. 2194-9034 Copernicus Publications Göttingen, Germany 10.5194/isprs-archives-XLIII-B2-2021-527-2021 3D RECONSTRUCTION OF ICE SHAPE USING VISIBLE AND THERMAL RANGE IMAGING FOR AIRCRAFT ICING STUDY Knyaz V. A. 1 2 Ippolitov E. V. 3 Novikov M. M. 3 State Research Institute of Aviation System (GosNIIAS), 125319 Moscow, Russia Moscow Institute of Physics and Technology (MIPT), Dolgoprudny, Russia Institute on Laser and Information Technologies of RAS – branch Research Centre Crystallography and Photonics RAS, Shatura, Russia 28 06 2021 XLIII-B2-2021 527 532 Copyright: © 2021 V. A. Knyaz et al. 2021 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://isprs-archives.copernicus.org/articles/XLIII-B2-2021/527/2021/isprs-archives-XLIII-B2-2021-527-2021.html The full text article is available as a PDF file from https://isprs-archives.copernicus.org/articles/XLIII-B2-2021/527/2021/isprs-archives-XLIII-B2-2021-527-2021.pdf

<p>Aircraft icing is one of the main factors decreasing the flight safety. Qualitative and quantitative understanding of the icing process is crucially needed for developing anti-icing measures and safety recommendations. Changes in aerodynamic characteristics of aircraft caused by changes in shape of aircraft surfaces due to the ice accretion can lead to significant aerodynamic performance degradation. So the reliable and accurate information of how the shape of the ice accretion influences on aerodynamic characteristics is a key point for predicting the changes in aerodynamic performance.</p><p>The study addresses to a problem of accurate shape measuring of ice accretion for further experimental study of iced-aircraft aerodynamic in a hydrodynamic tunnel. For this purpose the evaluation of various techniques of ice 3D measurements is performed that include as visible so thermal imaging of ice accretion. The results of evaluation serves for the decision of preferable technique to be used in experimental study. Also the framework is developed for creating physical models of iced aircraft based on result of real ice accretion shape measurement. It allows to produce stereolithography (SLA) copies of of an aircraft under icing condition for different levels of icing. These SLA-models of an aircraft under icing condition are then used for flow behaviour study in order to identify critical flying condition.</p>