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Ice-Crystal Icing Accretion Studies at the NASA Propulsion Systems Laboratory
Technical Paper
2019-01-1921
ISSN: 0148-7191, e-ISSN: 2688-3627
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Abstract
This paper describes an ice-crystal icing experiment conducted at the NASA Propulsion System Laboratory during June 2018. This test produced ice shape data on an airfoil for different test conditions similar to those inside the compressor region of a turbo-fan jet engine. Mixed-phase icing conditions were generated by partially freezing out a water spray using the relative humidity of flow as the primary parameter to control freeze-out. The paper presents the ice shape data and associated conditions which include pressure, velocity, temperature, humidity, total water content, melt ratio, and particle size distribution. The test featured a new instrument traversing system which allowed surveys of the flow and cloud. The purpose of this work was to provide experimental ice shape data and associated conditions to help develop and validate ice-crystal icing accretion models. The results support previous experimental observations of a minimum melt-ratio threshold for accretion to occur as well as the existence of a plateau region where the icing severity is high for a range of melt ratios. However, a maximum limit for melt ratio, which is suggested in the ice crystal icing literature, was not observed perhaps complicated by the potential for some supercooling of the water at these conditions.
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Struk, P., Agui, J., Ratvasky, T., King, M. et al., "Ice-Crystal Icing Accretion Studies at the NASA Propulsion Systems Laboratory," SAE Technical Paper 2019-01-1921, 2019, https://doi.org/10.4271/2019-01-1921.Data Sets - Support Documents
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