3D surface pressure measurement with single light-field camera and pressure-sensitive paint

作者：Shi, Shengxian^*; Xu, Shengming; Zhao, Zhou; Niu, Xiaofu; Quinn, Mark Kenneth^*

来源：Experiments in Fluids, 2018, 59(5): 79.

DOI：10.1007/s00348-018-2534-z

• Analytical calculation
• Measurement techniques
• Novel techniques
• Pressure sensitive paints
• Surface pressure distribution
• Three dimensional geometry
• Three-dimensional information
• Three-dimensional model

A novel technique that simultaneously measures three-dimensional model geometry, as well as surface pressure distribution, with single camera is demonstrated in this study. The technique takes the advantage of light-field photography which can capture three-dimensional information with single light-field camera, and combines it with the intensity-based pressure-sensitive paint method. The proposed single camera light-field three-dimensional pressure measurement technique (LF-3DPSP) utilises a similar hardware setup to the traditional two-dimensional pressure measurement technique, with exception that the wind-on, wind-off and model geometry images are captured via an in-house-constructed light-field camera. The proposed LF-3DPSP technique was validated with a Mach 5 flared cone model test. Results show that the technique is capable of measuring three-dimensional geometry with high accuracy for relatively large curvature models, and the pressure results compare well with the Schlieren tests, analytical calculations, and numerical simulations.

• 出版日期2018-5
• 单位上海交通大学