NTRS - NASA Technical Reports Server

Back to Results
Passive infrared ice detection for helicopter applicationsA technique is proposed to remotely detect rotor icing on helicopters by using passive IR thermometry to detect the warming caused by latent heat release as supercooled water freezes. During icing, the ice accretion region will be warmer than the uniced trailing edge, resulting in a characteristic chordwise temperature profile. Preliminary tests were conducted on a static model in the NASA Icing Research Tunnel for a variety of wet (glaze) and dry (rime) ice conditions. The chordwise temperature profiles were confirmed by observation with an IR thermal video system and thermocouple observations. The IR observations were consistent with predictions of the LEWICE ice accretion code, which was used to extrapolate the observations to rotor icing conditions. Based on the static observations, the passive IR ice detection technique appears promising; however, further testing or rotating blades is required.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Dershowitz, Adam L.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Hansman, R. John, Jr.
(MIT Cambridge, MA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Subject Category
Air Transportation And Safety
Meeting Information
Meeting: AHS, Annual Forum
Location: Washington, DC
Country: United States
Start Date: May 21, 1990
End Date: May 23, 1990
Accession Number
Funding Number(s)
Distribution Limits

Available Downloads

There are no available downloads for this record.
No Preview Available