Faculty of Mechanical Engineering, Lj. (FSLJ)
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Characterization of a newly developed diaphragmless shock tube for the primary dynamic calibration of pressure metersSvete, Andrej, 1983- ; Kutin, JožeIn conventional shock tubes with a diaphragm, many effects related to the burst of the diaphragm can influence shock formation, thus preventing an ideal pressure step change, as predicted by the ... shock tube measurement model being generated. This paper presents a newly developed diaphragmless shock tube with a quick-acting pneumatic valve, which demonstrates several advantages over conventional shock tubes with a diaphragm. The tests of the developed diaphragmless shock tube were performed using nitrogen at the atmospheric initial driven pressure, and at initial driver gauge pressures from 1 MPa to 7 MPa. The results show that the construction of the developed shock tube effectively reduces the generation of secondary shock waves and mechanical vibrations, which are often generated during the operation of shock tubes, thereby increasing the uncertainty of the shock tube calibration method. The uncertainty analysis shows that the developed diphragmless shock tube can act as a primary time-varying pressure calibration standard, generating pressure steps with a magnitude calculable from its measurement model to characterize the dynamic performance of pressure transducers with a relative expanded uncertainty of less than 0.025.Source: Metrologia. - ISSN 0026-1394 (Vol. 57, no. 5, Sep. 2020, str. 1-12)Type of material - article, component partPublish date - 2020Language - englishCOBISS.SI-ID - 30595843
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Svete, Andrej, 1983- | 29619 |
Kutin, Jože | 20047 |
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