论文部分内容阅读
对不同厚度液体进行光强测量,深入探索空化气泡的运动,研究发光机理很有意义。用超声激励法在磷酸液体中实现多泡声致发光,研究不同共振频率下发光的特点。利用光电倍增管多次测量发光强度相互比较,结果是在液体厚度10 cm、驱动频率f=21.061 kHz和f=20.316 kHz时,周期性较好为50μs,液体通过漩涡集中气泡可以使更多气泡发光;在液体厚度3 mm、驱动频率f=17.91 kHz和f=19 kHz时,周期性很好为25μs;且光信号都较强。结论是磷酸中声致发光强度、周期与液体厚度、驱动频率密切相关。本文以磷酸液多泡声致发光实验研究为基础,从内部和外部原理来出发,详细介绍了光电倍增管在多泡声致发光光强测量中的实用,为今后研究者提供了一些经验。根据实验过程中遇到的一些实际问题提出了建议和改善意见。
It is very meaningful to study the light intensity measurement of liquids with different thickness and explore the movement of cavitation bubbles deeply. Acousto-electroluminescence in polyphosphoric acid liquid by ultrasonic excitation was studied, and the characteristics of luminescence at different resonance frequencies were studied. The results of multiple measurements of luminous intensity with photomultiplier tube are compared with each other at a liquid thickness of 10 cm with a periodicity of 50 μs at a driving frequency of f = 21.061 kHz and f = 20.316 kHz. Liquid bubbles concentrate through the vortex to allow more bubbles Luminescence; with a thickness of 3 mm, a good periodicity of 25 μs at a driving frequency of f = 17.91 kHz and f = 19 kHz; and a strong optical signal. The conclusion is that the phosphoric acid in the acoustic emission intensity, the cycle and the thickness of the liquid, the driving frequency is closely related. Based on the experiment of phosonic electroluminescence of phosphoric acid multi-bubble, this paper introduces the practicality of photomultiplier tube in the measurement of multi-bubble acoustic emission intensity based on internal and external principles, and provides some experiences for researchers in the future. According to some practical problems encountered in the experiment made recommendations and suggestions for improvement.