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Fast-response pressure-sensitive paint are widely used in high-speed wind tunnel testing. However, their application faces challenges from errors caused by spatial and temporal temperature inhomogeneities in the flow field. This study addresses temperature correction issues in fast-response PSP coating measurements for high-speed wind tunnel tests, introducing a dual-component fast-response pressure-sensitive paint developed based on the PC-PSP structure. PtTFPP and (Ba,Sr)₂SiO₄:Eu2+ were selected as the pressure-sensitive channel and reference channel, respectively. Steady-state calibration results demonstrate that the coating exhibits linear pressure sensitivity and temperature sensitivity in the near-vacuum regime, with temperature sensitivity closer to that of the reference channel compared to the atmospheric pressure regime, facilitating temperature correction calculations. Dynamic calibration reveals a rapid step response time of 83 microseconds. Validation tests using the HIFiRE-5 standard model in the M4 wind tunnel show that the temperature correction method based on the dual-component fast-response PSP coating and dual-camera acquisition effectively mitigates pressure errors caused by spatial temperature variations on the model surface and temporal temperature drifts, demonstrating potential for synchronous measurement of pressure fields and temperature fields.

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Temperature Correction of Fast-Response Pressure Sensitive Paint Measurement in High Speed Flow

  • 会议论文

  • 发表日期：

    2026年

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  • Zhaonan Xu,
  • Meng Wang,
  • Ronghuan Zhao,
  • Hongjie Zhong

摘要

Fast-response pressure-sensitive paint are widely used in high-speed wind tunnel testing. However, their application faces challenges from errors caused by spatial and temporal temperature inhomogeneities in the flow field. This study addresses temperature correction issues in fast-response PSP coating measurements for high-speed wind tunnel tests, introducing a dual-component fast-response pressure-sensitive paint developed based on the PC-PSP structure. PtTFPP and (Ba,Sr)₂SiO₄:Eu2+ were selected as the pressure-sensitive channel and reference channel, respectively. Steady-state calibration results demonstrate that the coating exhibits linear pressure sensitivity and temperature sensitivity in the near-vacuum regime, with temperature sensitivity closer to that of the reference channel compared to the atmospheric pressure regime, facilitating temperature correction calculations. Dynamic calibration reveals a rapid step response time of 83 microseconds. Validation tests using the HIFiRE-5 standard model in the M4 wind tunnel show that the temperature correction method based on the dual-component fast-response PSP coating and dual-camera acquisition effectively mitigates pressure errors caused by spatial temperature variations on the model surface and temporal temperature drifts, demonstrating potential for synchronous measurement of pressure fields and temperature fields.