Projects / Programmes
Advanced shock tube system for high-frequency primary dynamic pressure calibration
| Code |
Science |
Field |
Subfield |
| 2.15.00 |
Engineering sciences and technologies |
Metrology |
|
| Code |
Science |
Field |
| 2.02 |
Engineering and Technology |
Electrical engineering, Electronic engineering, Information engineering |
pressure metrology, dynamic calibration, dynamic pressure generator, dynamic primary standard, diaphragmless shock tube, shock wave characteristics, analysis of measurement uncertainty, frequency characteristics
Data for the last 5 years (citations for the last 10 years) on
June 30, 2024;
A3 for period
2018-2022
Data for ARIS tenders (
04.04.2019 – Programme tender,
archive
)
| Database |
Linked records |
Citations |
Pure citations |
Average pure citations |
| WoS |
48 |
598 |
496 |
10.33 |
| Scopus |
66 |
818 |
670 |
10.15 |
Researchers (8)
Organisations (1)
Abstract
The increasing need for accurate measurement of rapidly varying pressures in various industrial and scientific applications requires the use of pressure meters with suitable dynamic properties. At present, it is rather difficult to assure comparable and quality dynamic pressure measurements due to the lack of their metrological traceability to the International System of Units (SI). To establish the metrological traceability for the time-varying pressure measurements, primary dynamic measurement standards, which would enable realization of measured quantity in calibration via other base physical quantities, are being developed. The objective of this project is to develop advanced system for high-frequency pressure dynamic calibration with a calibration and measurement capability to act as a primary dynamic pressure calibration standard. The proposed concept is based on the shock tube, which instead of diaphragm uses a fast opening valve. Based on a complete analysis of different effects on the supersonic velocity distribution of the shock waves, we will determine general functional dependence of the shock wave velocity along the tube on different thermodynamic and transport properties of the used gas and geometrical parameters of the shock tube. With the help of the obtained findings, we will develop an enhanced measurement model, which will decrease the uncertainty contribution that covers the incompleteness of the current shock tube measurement model, and evaluate and select the optimal operating conditions and geometrical parameters for the increased pressure and frequency calibration range of the shock tube. Based on the defined optimal operating conditions and geometrical parameters, we will build a shock tube that will enable the generation of well-defined pressure step changes up to 10 MPa. This will lead to its much expanded calibration pressure range in comparison to the conventional shock tubes, which are limited to the pressure amplitude realization range of up to few MPa. Furthermore, the shock tube will be designed to provide longer period of time during which the post-shock pressure remains constant and therefore also assure increased frequency calibration range in comparison to the conventional shock tubes. The configuration will also be adapted to allow dynamic calibrations of pressure meters with the use of liquid, which will be the first proof-of-principle of liquid dynamic calibrator, in which the shock waves are used to generate time-varying pressure. Our proposed concept of liquid shock tube system is based on a double-acting actuator, in which the incident shock wave generated within the gas-filled part of the shock tube will excite the piston separating the gas-filled part of the shock tube and a liquid-filled cylinder with the integrated pressure meter under calibration. The proposed configuration of the calibrator will therefore combine the advantages of both aperiodic pressure generators, shock tube as a high-frequency pressure generator and drop weight system as a high-amplitude liquid pressure generator. The developed shock-tube system will be applied for dynamic calibrations of commercial high-frequency pressure measurement systems (PMSs) and innovative pressure sensors for automotive engines developed and produced by Slovenian company Hidria. With the use of optimal algorithms for determining the complex discrete frequency response function from the time response of the high-frequency PMS to the step pressure change in the shock tube, we will determine the amplitude and phase frequency characteristics of the PMSs under test with the uncertainty of 1% and 5°, respectively, in few 10 kHz range.
