Acoustical measurements of bubble production by spilling breakers
Acoustical measurements of bubble production by spilling breakers
复制标题
溢出破碎机产生气泡的声学测量
DOI：
10.1121/1.399917
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发表时间：
1990
影响因子：
2.4
通讯作者：
A. Daniel
中科院分区：
文献类型：
--
作者：
H. Medwin;A. Daniel
在实验室装置中，测量了在溢流破碎机下新产生气泡的表面气泡谱密度。这已经通过被动地识别数百个单独气泡的半径，位置和创建时间来实现，因为它们的冲击激发脉动辐射阻尼球面声波。测得的气泡光谱范围为半径50 μm至7.4 mm，峰值为每平方米6个气泡，半径增量为1 μs，半径为150 μs。气泡产生的速率随时间呈指数下降，97%的气泡是在破碎机通过后的前500 ms内产生的。这些结果补充了最近的低海况海洋数据。
The surface bubble spectral density of newly created bubbles has been measured under spilling breakers in a laboratory facility. This has been accomplished acoustically by passively identifying the radius, position, and time of creation of several hundred individual bubbles as their shock‐excited pulsations radiate damped spherical waves of sound. The measured bubble spectrum ranges from radius 50 μm to 7.4 mm with a peak of 6 bubbles per square meter in a 1‐μs‐radius increment at radius 150 μs. The rate of bubble production has an exponential fall‐off with time and 97% of the bubbles are produced in the first 500 ms after the breaker passes. The results supplement recent ocean data for low sea states.