Comparing the adiabatic and isothermal pressure dependence of the index of refraction in a drop-weight apparatus

Slanina, Oliver; Quabis, Susanne; Derksen, S.; Herbst, Jörg; Wynands, R.

doi:10.1007/s00340-020-07519-z

Cited by 10 publications

(4 citation statements)

References 24 publications

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“…The applicable pressure range of the measurement standard is 60 MPa up to (at least) 400 MPa. An important thing was to investigate the difference between adiabatic and isothermal compression of liquids by an impacting weight, as observed in the resulting change to the index of refraction [9]. It was found that the optical properties under adiabatic and isothermal compression can be converted into each other using literature values of thermodynamic properties.…”

Section: Drop-weight Devices Based On Refractive Index Methodsmentioning

confidence: 99%

Development of Measurement and Calibration Techniques for Dynamic Pressures and Temperatures – Results and Achievements

Högström¹,

Saxholm²,

Sarraf³

et al. 2023

Proceedings of the 6th IMEKO TC16 Conference on Pressure and Vacuum Measurement

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This paper presents the main results and achievements of the EMPIR DynPT project [1]. Dynamic measurement of pressure and temperature are a key requirement for process control in several demanding applications, such as automotive, marine and turbine engines, manufacturing processes, and ammunition and product safety. The quality of these measurement has been significantly improved in this project through development of dynamic measurement standards and methods and characterized sensor technologies and means of estimating measurement uncertainties in real process conditions.

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Section: Drop-weight Devices Based On Refractive Index Methodsmentioning

confidence: 99%

Development of Measurement and Calibration Techniques for Dynamic Pressures and Temperatures – Results and Achievements

Högström¹,

Saxholm²,

Sarraf³

et al. 2023

Proceedings of the 6th IMEKO TC16 Conference on Pressure and Vacuum Measurement

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“…The liquids studied were sebacate, glycerol and water. In the study, sebacate was evaluated as the most suitable measuring fluid for dynamic pressure measurements using low weight masses [9]. However, in different studies, glycerol was preferred as the liquid used in the measuring head [8,10].…”

Section: Introductionmentioning

confidence: 99%

Determination of parameters generating the reference pressure in the primary level dynamic pressure measurement system based on the drop weight method

Yılmaz,

Arıkan,

Durgut

et al. 2024

Metrology and Measurement Systems

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For some industries such as automotive, defence, aerospace, pharmaceutical manufacturing, dynamic pressure measurement is an important requirement. In a primary level dynamic pressure measurement system with a drop weight method, the dynamic pressure value is calculated using parameters such as the effective area value depending on the piston cylinder unit, the maximum acceleration value measured by a laser interferometer. On the other hand, the type of liquid used in the measuring head is another important factor affecting repeatability and providing ease of measurement. In this study, a new measurement head, piston and cylinders were designed, manufactured and the Taguchi method was used to accurately determine some parameters affecting the measurements in a dynamic primary pressure measurement system operating with the drop weight method. In the studies carried out, four pistons, four cylinders, four sampling frequency values and two liquid types were considered. By using the Taguchi method, the optimum parameters of the dynamic pressure measurement system with drop weight method were determined with only sixteen experiments instead of one hundred and twenty-eight.

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“…Metrological traceability to the International System of Units (SI) requires the development of appropriate primary standards for dynamic measurements of pressure [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. The aperiodic shock tube pressure generators show a potential to provide SI-traceable dynamic calibrations for pressure sensors [ 17 , 18 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Dynamic Response of a Side-Wall Pressure Measurement System on Determining the Pressure Step Signal in a Shock Tube Using a Time-of-Flight Method

Svete

Castro

Kutin

2022

Sensors

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Technological progress demands accurate measurements of rapidly changing pressures. This, in turn, requires the use of dynamically calibrated pressure meters. The shock tube enables the dynamic characterization by applying an almost ideal pressure step change to the pressure sensor under calibration. This paper evaluates the effect of the dynamic response of a side-wall pressure measurement system on the detection of shock wave passage times over the side-wall pressure sensors installed along the shock tube. Furthermore, it evaluates this effect on the reference pressure step signal determined at the end-wall of the driven section using a time-of-flight method. To determine the errors in the detection of the shock front passage times over the centers of the side-wall sensors, a physical model for simulating the dynamic response of the complete measurement chain to the passage of the shock wave was developed. Due to the fact that the use of the physical model requires information about the effective diameter of the pressure sensor, special attention was paid to determining the effective diameter of the side-wall pressure sensors installed along the shock tube. The results show that the relative systematic errors in the pressure step amplitude at the end-wall of the shock tube due to the errors in the detection of the shock front passage times over the side-wall pressure sensors are less than 0.0003%. On the other hand, the systematic errors in the phase lag of the end-wall pressure signal in the calibration frequency range appropriate for high-frequency dynamic pressure applications are up to a few tens of degrees. Since the target phase measurement uncertainty of the pressure sensors used in high-frequency dynamic pressure applications is only a few degrees, the corrections for the systematic errors in the detection of the shock front passage times over the side-wall pressure sensors with the use of the developed physical dynamic model are, therefore, necessary when performing dynamic calibrations of pressure sensors with a shock tube.

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Comparing the adiabatic and isothermal pressure dependence of the index of refraction in a drop-weight apparatus

Cited by 10 publications

References 24 publications

Development of Measurement and Calibration Techniques for Dynamic Pressures and Temperatures – Results and Achievements

Development of Measurement and Calibration Techniques for Dynamic Pressures and Temperatures – Results and Achievements

Determination of parameters generating the reference pressure in the primary level dynamic pressure measurement system based on the drop weight method

Effect of the Dynamic Response of a Side-Wall Pressure Measurement System on Determining the Pressure Step Signal in a Shock Tube Using a Time-of-Flight Method

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