The dynamic calibration method of PSP and its characteristics research considering the influence of temperature

LIU Qiang; LI Qiang; WEI Chunhua; YIN Xiwei; JIANG Hailin; LIANG Lei

doi:10.11729/syltlx20230161

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Article Navigation > Journal of Experiments in Fluid Mechanics > 2024 > Accepted Manuscript

LIU Q, LI Q, WEI C H, et al. The dynamic calibration method of PSP and its characteristics research considering the influence of temperature[J]. Journal of Experiments in Fluid Mechanics, doi: 10.11729/syltlx20230161

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The dynamic calibration method of PSP and its characteristics research considering the influence of temperature

doi: 10.11729/syltlx20230161

LIU Qiang^{1, 2
,},
LI Qiang¹,
WEI Chunhua²,
YIN Xiwei²,
JIANG Hailin²,
LIANG Lei^{2
,
,}

1.
School of Information Engineering, Southwest University of Science and Technology, Mianyang　621010, China
2.
Low Speed Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang　621000, China

Received Date: 2023-11-20
Accepted Date: 2024-02-04
Rev Recd Date: 2023-12-26

Available Online: 2024-04-17

Abstract

Abstract

The dynamic characteristics and temperature effects of fast-response pressure-sensitive paint are the key factors for determining whether it is applicable to unsteady flow fields. This paper proposes a method for dynamic calibration of fast-response PSP (Pressure-Sensitive Paint), establishes a controllable calibration standing wave field through a dynamic calibration system that can adjust the temperature and frequency, and researches on the influence of temperature on pressure sensitivity and frequency response characteristics of the developed PC-PSP (Polymer Ceramic Pressure-Sensitive Paint). Dynamic calibration reflects the PSP characteris-tics more accurately than static calibration. Frequency changes have a significant effect on the pressure sensitivity of PC-PSP, and the influence of temperature on the pressure sensitivity of PC-PSP is not significant, while the temperature sensitivity of PC-PSP cannot be ignored in measure-ment. At the same temperature, the gain decreases and the phase lags behind as the frequency increases. At different temperatures, with the increase of the temperature, the cut-off frequency increases, and the phase lag gradually weakens. The dynamic pressure sensitivity at 20 ℃ and 0.5 kHz is 0.59%/kPa, and at 20 ℃ and 3 kHz is 0.51%/kPa, with the cut-off frequency being 4.8 kHz. Therefore, the performance of the tested PC-PSP is stable and meets the engineering requirements for unsteady flow field pressure measurement tests in low-speed wind tunnels.
- fast-response PSP,
- Polymer Ceramic Pressure-Sensitive Paint (PC-PSP),
- dynamic calibration,
- standing wave field,
- temperature influence,
- pressure sensitivity,
- dynamic characteris-tics

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References(24)

References

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