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Experimental Measurement of Air Flow Velocity Fluctuation of Wind-sand Flux
Author(s): 
Pages: 352-360
Year: 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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