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Published on: August 3, 2018
Film-based pressure-sensitive-paint measurements
Optics Letters
|November 3, 2009
Summary
This study introduces a new method for measuring surface pressure using pressure-sensitive paint and film imaging. This technique provides the first quantitative global surface pressure measurements with pressure-sensitive paint via film-based imaging.
Area of Science:
- Aerospace Engineering
- Optical Measurement
- Fluid Dynamics
Background:
- Surface pressure measurement is crucial for aerodynamic analysis.
- Traditional methods can be complex and time-consuming.
- Pressure-sensitive paint (PSP) offers a potential for global surface measurement.
Purpose of the Study:
- To describe a novel film-based imaging technique for surface pressure measurement using PSP.
- To demonstrate the feasibility of quantitative global surface pressure mapping with this system.
Main Methods:
- Utilized an oxygen-permeable, photoluminescent PSP excited by 455 nm light.
- Imaged luminescence (>570 nm) with a 35-mm film camera, then digitized the images.
- Employed image subtraction and calibration with known pressures to obtain quantitative data.
Main Results:
- Established a logarithmic relationship between luminescence quenching by oxygen and pressure.
- Successfully acquired quantitative global surface pressure distributions.
- Achieved what is believed to be the first quantitative global surface measurements using PSP with film-based imaging.
Conclusions:
- The described film-based imaging technique is effective for quantitative surface pressure measurement with PSP.
- This method offers a novel approach for global surface pressure mapping in aerodynamic studies.
- The technique advances the application of PSP for detailed flow analysis.
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