Mechanical Ice Release Processes. I. Self-Shedding from High-Speed Rotors

Ice accreted on high-speed rotors operating in supercooled fog can be thrown off by centrifugal force, creating severe unbalance and dangerous projectiles. A simple force balance analysis indicates that the strength of accreted ice and its adhesive strength can be obtained by measuring the thickness...

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Bibliographic Details
Main Author: Itagaki,K
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1983
Subjects:
Snow
Ice and Permafrost
*Rotors
*Ice
Ice formation
Propeller blades
Rotor blades(Rotary wings)
Accumulation
Thickness
Tensile strength
Shear strength
Adhesion
Release
Laboratory tests
PE61102A
AST24
WU002
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA135369
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA135369
Description
Summary:Ice accreted on high-speed rotors operating in supercooled fog can be thrown off by centrifugal force, creating severe unbalance and dangerous projectiles. A simple force balance analysis indicates that the strength of accreted ice and its adhesive strength can be obtained by measuring the thickness of the accretion, the location of the separation, the rotor speed, and the density. Such an analysis was applied to field and laboratory observations of self-shedding events. The results agree reasonably well with other observations. (Author)

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