摘要
本文利用超声检测中的穿透法,用频率为0.5 MHz、 1MHz、 1.25MHz、 2MHz、 2.5MHz的声波,测量了气一水混相介质中的声速比值和声透射损失。结果表明:在气泡大小、分布一定的情况下,可能用声透射损失来确定混相介质中的含气量,但不宜用声速比值.
The ratio of acoustic velocities and the sound transmission loss were measured in air-water mixture at frequencies of 0.5MHz, 1MHz, 1.25MHz, 2MHz, 2.5MHz. The experimental results indicate that the concentration of entrained air might be dete rmined by using the sound transmission loss, but it can not be determined by using the ratio of acoustic velocities.
出处
《应用声学》
CSCD
北大核心
1999年第1期32-35,共4页
Journal of Applied Acoustics
关键词
声速比值
声透损失
含气量
气-水混相介质
Ratio of acoustic velocities, Sound transmission loss, Concentration of en- trained air