Towards reliable turbulence estimations with phase-detection probes: an adaptive window cross-correlation technique
Towards reliable turbulence estimations with phase-detection probes: an adaptive window cross-correlation technique
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DOI：
10.1007/s00348-018-2650-9
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发表时间：
2018-11
影响因子：
2.4
通讯作者：
M. Kramer;D. Valero;H. Chanson;D. Bung
中科院分区：
文献类型：
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作者：
M. Kramer;D. Valero;H. Chanson;D. Bung
空气-水两相流动的湍流是由双尖端相位探测探头测量的准瞬时速度得到的。这一新技术是基于自适应时间窗的互相关分析和稳健的滤波准则相结合提出的，允许计算高度充气流动中的速度时间序列。每一次速度估计都对应于一小群气泡或液滴。生成了随机合成速度场，以评估与拟议分析相关的局限性和不确定性。随后，通过对大型阶梯溢洪道上的实际两相流的应用，展示了该技术的能力。
Air–water flow turbulence was derived from pseudo-instantaneous velocities measured with a dual-tip phase-detection probe. This new technique is proposed based upon adaptive time windows for cross-correlation analysis combined with robust filtering criteria, allowing computation of velocity time series in highly aerated flows. Each velocity estimation corresponded to a small group of bubbles or droplets. Stochastic synthetic velocity fields were generated to assess the limitations and uncertainties related to the proposed analysis. Subsequently, capabilities of the technique were demonstrated through an application to a real two-phase flow on a large-size stepped spillway.