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Title: De-icing using lasers
Authors: United States. Army Materiel Command
Lane, J. W. (Jean W.)
Marshall, S. J. (Stephen J.)
Keywords: Control
Deicing systems
Reaction kinetics
Test methods
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: CRREL report ; 76-10.
Description: CRREL Report
Abstract: The feasibility of employing a laser to de-ice remote surfaces was investigated. A Nd:Glass laser, wavelength 1.06 of micrometers, and a Ruby laser, wavelength 6943 A~, were used to irradiate ice grown upon six types of substrates - asphalt, brass, concrete, aluminum, steel, and stone. It was found that a single pulse, delivered to the interface between the ice and its substrate at a power density of 10(8) to 10(9) watts/cm(2), produced fractures 0.1 to 2 cm in diameter for all substrates. If the initial fracture could be propagated by suitable scanning of the optical beanvover the interface, the ice could be disrupted and thus removed from the substrate. The technique could also be a useful adjunct to de-icing methods that depend upon the existence of an initial crack. The process of producing the initial fracture was found to be limited by the thickness of the ice, the bubble content of the ice, and the focusing system. Note: The symbol ~ indicates the presence of a missing scientific or mathematical symbol. The downloaded file will contain the missing symbols. Any numerals within brackets ( ) in this abstract are exponents.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:CRREL Report

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