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Issue:
Experimental Measurement of Air Flow Velocity Fluctuation of Wind-sand Flux
Author(s):
LI Zhenshan
,
NI Jinren
Pages:
352
-
360
Year:
2003
Issue:
4
Journal:
JOURNAL OF BASIC SCIENCE AND ENGINEERING
Keyword:
风沙流
;
风速脉动
;
垂线分布
;
风洞实验
;
Abstract:
在风洞中测量了四种风速条件下净风与挟沙风的速度脉动,发现沙粒运动削弱了平均流速而增加了脉动流速,并且不改变流速脉动的分布规律.挟沙风的脉动速度不再像净风那样随高度增加而单调减小,而是在床面附近变化不大,接着出现极大值,随后依高度增大又趋于减小;也不像净风那样随平均风速的增大而减小,而是先增大后减小,存在极大值.
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