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Study on MHz high-speed PIV technique
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Xintao LU1, Hang ZHAO1, Wenxuan SHE1, Han TU2, 1, Qi GAO1, *, Runjie WEI3, Fang ZHANG4, Shuang Chen5
Journal of Experiments in Fluid Mechanics | 2026, 40(2) : 40 - 49
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Journal of Experiments in Fluid Mechanics | 2026, 40(2): 40-49
• Measuring Technique •
Study on MHz high-speed PIV technique
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Xintao LU1, Hang ZHAO1, Wenxuan SHE1, Han TU2, 1, Qi GAO1, *, Runjie WEI3, Fang ZHANG4, Shuang Chen5
Affiliations
  • 1School of Aeronautics and Astronautics, Zhejiang University, Hangzhou　310027, China
  • 2School of Mechanical & Electrical Engineering, Wuhan Institute of Technology, Wuhan　430205, China
  • 3MicroVec. Inc., Beijing　100083, China
  • 4Beamtech Optronics Co., Ltd, Beijing　102209, China
  • 5Facility Design and Instrumentation Institute, China Aerodynamics Research and Development Center, Mianyang　621000, China
Published: 2026-04-25 doi: 10.11729/syltlx20230144
Outline
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Transonic flows have presented an enduring challenge to experimental research due to their intricate and unsteady flow characteristics. This study investigated the megahertz-frequency Particle Image Velocimetry (MHz–PIV) technique to enhance the resolution of small time-scale flows under the transonic flow conditions. During the measurement, five high-speed cameras alternately and quickly captured images of the same measurement area, and thus obtained ultra-high time resolution particle image data. By employing image processing techniques, optical distortion correction and identification of the common area were achieved. The application of the ensemble correlation algorithm, coupled with spectral analysis of the compressible turbulent flow field based on the velocity field, contributed to a comprehensive analysis. The experiment validated the high-frequency sampling capability of MHz–PIV, which significantly reduces the technology’s dependence on camera performance. This approach offers a refined measurement technique with high spatiotemporal resolution for transonic experiments.

transonic  /  particle image velocimetry  /  spatiotemporal resolution  /  image processing  /  turbulent power spectrum
鲁鑫涛, 赵航, 佘文轩, 涂晗, 高琪, 魏润杰, 张放, 陈爽. MHz高速PIV实验技术研究. 实验流体力学, 2026 , 40 (2) : 40 -49 . DOI: 10.11729/syltlx20230144
Xintao LU, Hang ZHAO, Wenxuan SHE, Han TU, Qi GAO, Runjie WEI, Fang ZHANG, Shuang Chen. Study on MHz high-speed PIV technique[J]. Journal of Experiments in Fluid Mechanics, 2026 , 40 (2) : 40 -49 . DOI: 10.11729/syltlx20230144
Appendix
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Year 2026 volume 40 Issue 2
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Article Info
doi: 10.11729/syltlx20230144
  • Receive Date：2023-10-31
  • Online Date：2026-10-23
  • Published：2026-04-25
Article Data
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History
  • Received：2023-10-31
  • Revised：2023-12-12
  • Accepted：2023-12-19
Affiliations
    1School of Aeronautics and Astronautics, Zhejiang University, Hangzhou　310027, China
    2School of Mechanical & Electrical Engineering, Wuhan Institute of Technology, Wuhan　430205, China
    3MicroVec. Inc., Beijing　100083, China
    4Beamtech Optronics Co., Ltd, Beijing　102209, China
    5Facility Design and Instrumentation Institute, China Aerodynamics Research and Development Center, Mianyang　621000, China
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表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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