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Record 1 of 44
Real-time measurement of ice growth during simulated and natural icing conditions using ultrasonic pulse-echo techniques
Author and Affiliation:
Hansman, R. J., Jr.(Massachusetts Inst. of Tech., Cambridge, MA, United States)
Kirby, M. S.(MIT, Cambridge, MA, United States)
Abstract: Results 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.
Publication Date: Jan 01, 1986
Document ID:
19860035122
(Acquired Nov 28, 1995)
Accession Number: 86A19860
Subject Category: AIR TRANSPORTATION AND SAFETY
Report/Patent Number: AIAA PAPER 86-0410
Document Type: Preprint
Publisher Information: United States
Contract/Grant/Task Num: NGL-22-009-640
Financial Sponsor: NASA; United States
Organization Source: Massachusetts Inst. of Tech.; Cambridge, MA, United States
Description: 9p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: FLIGHT SAFETY; ICE FORMATION; ULTRASONIC WAVE TRANSDUCERS; ECHOES; FLIGHT TESTS; REAL TIME OPERATION; SURFACE ROUGHNESS; WIND TUNNEL TESTS
Imprint And Other Notes: AIAA, Aerospace Sciences Meeting, 24th, Reno, NV, Jan. 6-9, 1986. 9 p. FAA-supported research.
Availability Source: Other Sources
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