A two-dimensional acoustic sediment flux profiler

A two-dimensional acoustic sediment flux profiler
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二维声学沉积物通量剖面仪

DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
U. Lemmin
U. Lemmin
中科院分区：
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文献类型：
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作者：
C. Shen;U. Lemmin

文献摘要

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瞬时沉积通量测量对于研究湍流的详细影响及其与沉积物质输运的关系非常重要。本文介绍了一种新型的声学沉积通量剖面仪，它能够直接测量瞬时沉积通量剖面。采用三个1MHz的超声换能器同时测量瞬时浓度分布和相应的二维速度分布。讨论了该系统的工作原理和实现方法。本文报道了明渠挟沙水流试验结果。
Instantaneous sediment flux measurement is important for the study of the detailed effects of turbulent currents and their relation to the transport of sedimentary materials. This paper presents a novel acoustic sediment flux profiler which is able to measure the instantaneous sediment flux profile directly. Three 1 MHz ultrasonic transducers are employed to measure the instantaneous concentration profile and the corresponding 2D velocity profile simultaneously. The principle of operation of the system and its realization are discussed. Experimental results obtained in an open-channel sediment-laden flow are reported.