Ice crystal icing is considered a severe aviation hazard responsible for aerodynamic deterioration, flight safety and controllability issues. Existing radar technology and 3D numerical tools falter in estimating the icing severity and timely detection of icing events. To address this challenge and improve the predictive capability of numerical tools, a series of advanced experimental investigations were carried out to provide complimentary experimental data for development, calibration and validation of numerical icing models. The core focus of this thesis is to further the understanding of ice crystal icing physics on heatable substrates and provide comprehensive experimental datasets that can be exploited for development of accurate predictive tools. To that end, each sub-process of ice crystal icing is individually investigated and the chain of events responsible for ice crystal accretion growth and shedding are analyzed in detail. Foremost, ice crystal accretion origins and inception on a dedicated heatable test article was investigated by means of high speed imaging measurement technique. The findings shed interesting insights into the ice accretion initiation phase, in particular, the different sub-stages leading up to the accretion of a fully developed ice layer on a heated substrate. The identification of semi-frozen particles with mixed phase composition at the interface lead to development of a numerical model which was more accurate and representative of ice crystal accretion process than its existing counterparts. To understand the heat transfer taking place between glaciated ice crystals and heated substrate, a well-equipped, highly detailed test article and novel experimental setup was designed to track the thermal evolution resulting from impact of icing cloud. This lead to improved understanding of heat transfer physics for wide range of experimental conditions in ice crystal icing conditions. For advancement of existing numerical models, quantified data on initiation time, evolution of ice ...


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    Titel :

    Experimental Investigation of Ice Crystal Icing Physics on Heated Substrates



    Erscheinungsdatum :

    2023-01-01



    Medientyp :

    Hochschulschrift


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :

    DDC:    6 / 62 / 629 / 690





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