Ultrasonic techniques for aircraft ice accretion measurementUltrasonic pulse-echo measurements of ice growth on cylinders and airfoils exposed to both artificial (icing wind tunnel) and natural (flight) icing conditions are presented. An accuracy of + or - 0.5 mm is achieved with the present method. The ultrasonic signal characteristics associated with each of the two types of icing regimes identified, wet and dry ice growth, are discussed. Heat transfer coefficients are found to be higher in the wind tunnel environment than in flight. Results for ice growth on airfoils have also been obtained using an array of ultrasonic transducers. Icing profiles obtained during flight are compared with mechanical and stereo image measurements.
Document ID
19880064683
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hansman, R. John, Jr. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Kirby, Mark S. (MIT Cambridge, MA, United States)
Lichtenfelts, Fred (Simmonds Precision Products, Inc. Aircraft Systems Div., Vergennes, VT, United States)