Calibration and Use of n-Hole Velocity Probes
Calibration and Use of n-Hole Velocity Probes
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DOI：
10.2514/1.j053130
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发表时间：
2015-02-01
期刊：
影响因子：
2.5
通讯作者：
Birch, David M.
中科院分区：
文献类型：
--
作者：
Shaw-Ward, Samantha;Titchmarsh, Alex;Birch, David M.
提出了一种针对多孔、基于压力的速度探头的通用校准过程，该过程与孔的数量和探头几何形状无关，从而允许使用具有大量孔的探头。使用传统的七孔压力探头和新颖的 19 孔压力探头在低速下演示了校准算法。由于校准算法独立于探头配置，因此它能够很好地容忍数据损坏和探头尖端几何形状的缺陷。使用具有大量孔的探头的优点在传统的机翼尾迹测量中得到了证明。 19 孔探头比传统的 7 孔探头具有更高的角度灵敏度，即使使用分析校准方案也能准确测量速度分量。该探头还可以提供高涡流中横流速度梯度张量的对角分量的局部估计。
A generalized calibration process is presented for multihole, pressure-based velocity probes that is independent of the number of holes and probe geometry, allowing the use of probes with large numbers of holes. The calibration algorithm is demonstrated at low speeds with a conventional seven-hole pressure probe and a novel 19-hole pressure probe. Because the calibration algorithm is independent of probe configuration, it is very tolerant of data corruption and imperfections in the probe-tip geometry. The advantages of using probes with large numbers of holes is demonstrated in a conventional wing wake survey. The 19-hole probe offers a higher angular sensitivity than a conventional seven-hole probe and can accurately measure velocity components even when an analytical calibration scheme is used. The probe can also provide local estimates of the diagonal components of the crossflow velocity gradient tensor in highly vortical flows.