Call number:
ZSP-201-79/4
In:
CRREL Report, 79-4
Description / Table of Contents:
A computer model is described to compute the amount of ice accretion on an object under a variety of initial conditions. Numerical techniques are best applied to these problems because of time dependent effects governing the amount of ice collected and also the variety of initial conditions that can lead to ice accumulation. The helicopter rotor icing problem adds an additional complexity since the velocity along the rotor blade varies over a wide range strongly affecting the amounts of ice collected at different blade positions. The physics of ice accretion is reviewed and the accounting for time-dependence in the computer model is described. Some model results are presented and indicate the dependence of ice accretion on velocity, droplet sizes, cloud liquid water content, and temperature for a cylindrical object of constant size.
Type of Medium:
Series available for loan
Pages:
iii, 39 Seiten
,
Illustrationen
Series Statement:
CRREL Report 79-4
URL:
https://hdl.handle.net/11681/9019
Language:
English
Note:
CONTENT
Abstract
Preface
Introduction
Ice accretion parameters
Physics of ice accretion
Interaction between water droplets and flow field
Time dependence in droplet trajectories
Thermodynamic processes at the surface of the object
Time dependence in the thermodynamics
Time dependence of lesser order
Numerical ice accretion model
Major subroutines
Options for droplet size variations
Option for the helicopter rotor case
Results
Conclusions and future studies
Literature cited
Appendix A: Computer program
Location:
AWI Archive
Branch Library:
AWI Library
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