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Pressure field measurements using bio-inspired pressure-sensitive film with adjustable sensitivity and range

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Abstract

A bio-inspired film has been developed as a non-contact, deformation-based optical pressure sensor with high spatial resolution. Under appropriate excitation, the pressure-induced deformation causes variations in the film emission intensity, establishing a quantitative relationship between the pressure and the emission intensity. This relationship is strongly affected by the stiffness of the film’s basement material. To exploit this effect, we adjusted the film’s pressure sensitivity and measurement range. In a jet impingement experiment, various films with different sensitivities were calibrated. After data processing, the pressure field results were analyzed. The measurement ranges and uncertainty of the film were discussed. Furthermore, the surface displacement fields of the film were obtained by measuring the changes in images using digital image correlation, which can potentially be transformed into shear force fields after the pressure effect and shear force effect are decoupled.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (NSFC No. 12022202 and No. 11725209).

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Authors and Affiliations

  1. Key Lab of Education Ministry for Power Machinery and Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Jiawei Chen, Yingzheng Liu, Zhaomin Cao & Di Peng

  2. Gas Turbine Research Institute, Shanghai Jiao Tong University, Shanghai, 200240, China

    Jiawei Chen, Yingzheng Liu, Zhaomin Cao & Di Peng

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  1. Jiawei Chen
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  2. Yingzheng Liu
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  3. Zhaomin Cao
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  4. Di Peng
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Correspondence to Di Peng.

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Chen, J., Liu, Y., Cao, Z. et al. Pressure field measurements using bio-inspired pressure-sensitive film with adjustable sensitivity and range. Exp Fluids 62, 51 (2021). https://doi.org/10.1007/s00348-021-03155-1

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  • DOI: https://doi.org/10.1007/s00348-021-03155-1

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