Photon-based standard for dynamic pressure calibration
| Reference number | |
| Coordinator | RISE Research Institutes of Sweden AB |
| Funding from Vinnova | SEK 1 000 000 |
| Project duration | December 2022 - March 2025 |
| Status | Completed |
Important results from the project
The main goal of the project to develop a traceable method based on optical absorption spectroscopy to measure dynamic pressure and temperature simultaneously was achieved. Validation of the theoretical model used to calculate the reference pressure generated by the shock tube, which is the candidate primary standard for dynamic pressure calibration at RISE, was performed.
Expected long term effects
The project leads to better calibration of dynamic pressure which is of great importance in many areas, for example in healthcare (blood pressure, dialysis, diagnostics), process control and energy efficiency in vehicles. The project leads to the development of a new primary standard based on spectroscopy for dynamic pressure and temperature calibration in the pressure range from a few hundred pascals up to 300 kPa, temperature from 400 K up to 2000 K and frequencies from 0 Hz up to 3 kHz.
Approach and implementation
Literature review and choosing of the absorber gas molecules and the absorption-bands for both pressure and temperature measurements. Building the absorption spectroscopy setup and performing measurements under static conditions at high temperature. Development of a model to calculate the pressure and temperature from the measured absorption spectra. Coupling absorption spectroscopy setup to the shock tube and performing of measurements. Calculating the uncertainty budget. Reporting the results.