Abstract Air-water free-surface flows are extremely complicated to model physically and numerically. The development of the air-water velocity metrology has been relatively slow and is still on-going. Phase-detection needle probes have been successfully used for both laboratory and field measurements in high-turbulence air-water flows, but the signal processing is not trivial. Recently a different method, called adaptive window cross-correlations (AWCC), was introduced for dual-tip phase-detection probe signals in steady air-water flows (Kramer et al. 2019). The technique includes a number of intrinsic limitations, which can lead to very poor data retention rates and does not guarantee better data quality and bias-free outputs. These limitations are discussed in the context of air-water free-surface flows.

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使用双尖端相位检测探头在高度充气流中估计速度 - 评论

摘要 空气-水自由表面流动的物理和数值模拟极其复杂。空气-水速度计量学的发展相对缓慢，并且仍在进行中。相位检测针式探头已成功用于高湍流空气-水流中的实验室和现场测量，但信号处理并非微不足道。最近，针对稳定的空气-水流中的双尖端相位检测探针信号引入了一种称为自适应窗口互相关 (AWCC) 的不同方法（Kramer 等人，2019 年）。该技术包括许多内在限制，这可能导致数据保留率非常低，并且不能保证更好的数据质量和无偏差输出。这些限制是在空气-水自由表面流动的背景下讨论的。