大气压下小型实验池气体核谱的人工控制方法研究

IF 2.4 Q2 ENGINEERING, MECHANICAL
Meicheng Yang, Lijia Yang, Daojiang Li, Zhiyong Jiang, Shuo Hou, Haichao Li
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引用次数: 0

摘要

随着实验装置和测量仪器精度的提高,跨介质车辆和螺旋桨等空化实验已经在小水池中进行。但由于实验室水质与工程应用水体不同,尤其是引起空化的气核浓度不同,导致实验结果与原型实验结果不同,出现尺度效应。为了减少尺度效应的影响,在实验正式实施之前,可以根据空化条件将气核与水混合。曝气行为会影响水中气核的大小和浓度(气核谱)。为了获得更好的实验结果,有必要弄清小规模实验池在曝气前后的气核谱变化,从而掌握曝气技术。通过研究发现,人工曝气方法可以有效地改变水中气核谱,提高气核浓度。利用水声测量方法,可以灵敏地捕捉到气体核谱的变化。曝气后水中气核谱与非人工干预下气核谱的数学模型吻合较好,说明人工曝气下水中气核分布与非人工干预下相似,有利于空化的发生。同时,实验与数值方法相结合可以降低测量状态,降低测量成本,提高测量效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Research on the artificial control method of the gas nuclei spectrum in the small-scale experimental pool under atmospheric pressure
Abstract With the improvement of the accuracy of experimental devices and measuring instruments, cavitation experiments such as cross-media vehicles and propellers have been carried out in small pools. However, the water quality in the laboratory and the engineering application waters differs, especially the concentration of the gas nuclei that cause cavitation, resulting in experimental results that differ from prototype experimental results, and the scale effect occurs. In order to reduce the influence of the scale effect, according to the conditions of cavitation, gas nuclei can be mixed with water before the experiment is formally implemented. Aeration behavior will affect the size and concentration of gas nuclei (gas nuclei spectrum) in water. In order to obtain better experimental results, it is necessary to clarify the variation of the gas nuclei spectrum in small-scale experimental pools before and after aeration, so as to master aeration technology. Through research, it is found that the artificial aeration method can effectively change the gas nuclei spectrum in water and increase the concentration of gas nuclei. By using the underwater acoustic measurement method, the change in the gas nuclei spectrum can be captured sensitively. The gas nuclei spectrum in water after aeration is in good agreement with the mathematical model of gas nuclei spectrum under non-artificial intervention, which shows that the distribution of gas nuclei in water under artificial aeration is similar to that under non-artificial intervention, which is conducive to the occurrence of cavitation. At the same time, it shows that the combination of experiment and numerical method can reduce the measuring state and the measurement cost and improve the measurement efficiency.
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来源期刊
CiteScore
6.20
自引率
3.60%
发文量
49
审稿时长
44 weeks
期刊介绍: The Journal of Nonlinear Engineering aims to be a platform for sharing original research results in theoretical, experimental, practical, and applied nonlinear phenomena within engineering. It serves as a forum to exchange ideas and applications of nonlinear problems across various engineering disciplines. Articles are considered for publication if they explore nonlinearities in engineering systems, offering realistic mathematical modeling, utilizing nonlinearity for new designs, stabilizing systems, understanding system behavior through nonlinearity, optimizing systems based on nonlinear interactions, and developing algorithms to harness and leverage nonlinear elements.
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