Format:
vii, 45 Seiten
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Illustrationen
Series Statement:
CRREL Report 77-9
Content:
This report presents experimental results on the conditions of initiation of an ice jam by a simple surface obstruction, on the equilibrium thickness of an ice jam formed by accumulation and submergence of ice floes, and on the compression strength of floating, fragmented ice cover. In the study on ice jam initiation, it was found that the minimum concentration of floes in the opening of the obstruction at which a jam occurs is nearly independent of the ratio of width of constricted passage to channel width, and is proportional to a negative power of the ratio of floe length to width of constricted passage. From energy analysis of floe submergence, a relationship relating the thickness of a jam formed by accumulation and submergence of floes to the approach flow characteristics was derived and found to fit satisfactorily the experimental data. In experiments on compression strength of floating, fragmented ice cover it was found that the compressive strength is inversely proportional to compression velocity and independent of cover length.
Note:
MAB0014.001: ZSP-201-77/9
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CONTENTS
Abstract
Preface
List of symbols
Introduction
I. Initiation of ice jams by partial surface obstructions
A. Introductory remarks
B. Experimental apparatus and procedure
C. Dimensional analysis
D. Presentation of results and discussion
ΙΙ. Thickness of ice jams due to accumulation and transport of ice floes
A. Introductory remarks
B. Experimental apparatus and procedures
C. Presentation of results
E. Conclusion
III. Compressive strength of floating fragmented ice covers
A. Introductory remarks
B. Experimental setup and procedure
C. Presentation of results and discussion
D. Conclusions
Literature cited
Appendix A: Experimental results on ice jam initiation
Appendix B: Effect of surface tension on submergence velocity of ice floes
Appendix C: Experimental results for ice jam thickness study
Appendix D: Experimental results on compressive strength of fragmented ice cover
In:
CRREL Report, 77-9
Language:
English
Keywords:
Forschungsbericht
URL:
https://hdl.handle.net/11681/9482
