Optimal Calibration of Directional Velocity Probes
Optimal Calibration of Directional Velocity Probes
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DOI：
10.2514/1.j056762
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发表时间：
2018-07-01
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;McParlin, Stephen C.;Birch, David M.
定向速度探头的校准可能需要大量的设施时间和资源，特别是在现场进行时。因此，应用实验设计技术来正式优化校准点的选择。提出了一种针对广义定向速度探头的模型，该模型用于生成近似多项式响应面模型，该模型与多种几何形状的多传感器热线探头和多孔压力探头的测量结果非常吻合。然后根据该响应面模型应用 D 最优过程，并相应地校准典型探针。然后使用探头扫描涡流发生器的尾流，以测试简化校准的效果。结果显示，与传统矩形网格相比，D 最优校准点可显着提高数据保真度，并且在校准点数量减少 25 倍后，所产生的额外不确定性也降至最低。
The calibration of directional velocity probes can require significant facility time and resources, especially if carried out in situ. The techniques of the design of experiments are therefore applied in order to formally optimize the selection of calibration points. A model is proposed for a generalized directional velocity probe, and this model is used to generate an approximate, polynomial response surface model that is shown to agree well with measurements from both multisensor hot-wire probes and multihole pressure probes, in a variety of geometries. The process of D optimality is then applied based on this response surface model, and a typical probe is calibrated accordingly. The probe is then used to scan the wake of a vortex generator in order to test the efficacy of the reduced calibrations. D-optimal calibration points are shown to offer a significant improvement in data fidelity over conventional rectangular grids, and minimal additional uncertainty is incurred after a 25-fold reduction in the number of calibration points.