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Real-time measurement of ice growth during simulated and natural icing conditions using ultrasonic pulse-echo techniquesResults of tests to measure ice accretion in real-time using ultrasonic pulse-echo techniques are presented. Tests conducted on a 10.2 cm diameter cylinder exposed to simulated icing conditions in the NASA Lewis Icing Research Tunnel and on an 11.4 cm diameter cylinder exposed to natural icing conditions in flight are described. An accuracy of + or - 0.5 mm is achieved for real-time ice thickness measurements. Ice accretion rate is determined by differentiating ice thickness with respect to time. Icing rates measured during simulated and natural icing conditions are compared and related to icing cloud parameters. The ultrasonic signal characteristics are used to detect the presence of surface water on the accreting ice shape and thus to distinguish between dry ice growth and wet growth. The surface roughness of the accreted ice is shown to be related to the width of the echo signal received from the ice surface.
Document ID
19860035122
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hansman, R. J., Jr.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Kirby, M. S.
(MIT Cambridge, MA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1986
Subject Category
Air Transportation And Safety
Report/Patent Number
AIAA PAPER 86-0410
Accession Number
86A19860
Funding Number(s)
CONTRACT_GRANT: NGL-22-009-640
Distribution Limits
Public
Copyright
Other

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