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arXiv 2408.06009physics.flu-dyn
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面向气液两相流实验的下一代双尖端相位检测探针研发

Developing the next generation of dual-tip phase-detection probes for air-water flow experiments

Matthias Kramer

AI总结:

本研究针对传统双尖端相位检测电导探针的设计局限,研发了带印刷电路板电极和可拆卸传感头的下一代探针,经验证其精度高、易更换,有望提升气液流实验重复性与领域可及性。

摘要:

自掺气是一种常见于自然或人工环境中高弗劳德数流动的特殊现象。表征这类流动最常用的气液两相流测量仪器是侵入式双尖端相位检测针式探针,它通过电阻率变化(相位检测电导探针)或光折射(相位检测光纤探针)识别针尖周围的相变。相位检测电导探针通常为研究用途定制,当前设计可追溯至20世纪80年代。本研究研发了下一代双尖端电导探针,并与最先进的系统进行了对比验证。新型探针设计包含两大核心特征:(1)传感器电极采用印刷电路板结构;(2)传感器头为可拆卸式。这些特征相比传统针式设计具备诸多优势,例如电路板可高精度制造,传感器头在损坏或老化时可轻松更换。据此可以预期,这种成本较低且坚固耐用的设计将提升气液两相流实验的可重复性,同时为气液两相流研究领域提供更高的使用便捷性。

英文摘要:

Self-aeration is a fascinating phenomenon that commonly occurs in high Froude-number flows in natural or human made environments. The most common air-water flow measurement instrument to characterize such flows is the intrusive dual-tip phase-detection needle probe, which identifies phase changes around the needle tips due to a change of resistivity (phase-detection conductivity probe) or light refraction (phase-detection fiber optical probe). Phase-detection conductivity probes are typically custom made for research purposes, with current design dating back to the 1980ies. In the present study, the next generation of dual-tip conductivity probes is developed and validated against a state-of-the-art system. The novel probe design comprises two main features, including (1) a printed circuit board of the sensor's electrodes and (2) a detachable sensor head. These features offer many advantages over the classical needle-type design. For example, the circuit boards can be manufactured with high precision and the sensor head can be easily replaced in case of damage or deterioration. As such, it is anticipated that this relatively cheap and robust design will enable a better repeatability of air-water flow experiments, combined with an enhanced accessibility for the air-water flow research community.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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