| Zugriffsnummer | 37584 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | LDA volume flow rate standard for water using high spatial resolution LDA for traceable measurements in power plants |
| Autor(in); Institution |
Juling, Markus; 7.5, Wärme und Vakuum, PTB-Berlin
Steinbock, Jonas; 7.5, Wärme und Vakuum, PTB-Berlin
Kraume, M.; Technische Universität Berlin, GERMANY
Lederer, Thomas; 7.5, Wärme und Vakuum, PTB-Berlin
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| Quelle/Jahr | 17th International Flow Measurement Conference, FLOMEKO 2016:(2016), 1 - 4 |
| URL | |
| Konferenzangaben | 17th International Flow Measurement Conference FLOMEKO 2016, Sydney, 26-29, September, 2016, Australia |
| Freie Schlagworte | LDA ; volume flow rate ; LFS ; high temperature ; high pressure ; velocity profile |
| Zusammenfassung | At the Physikalisch-Technische Bundesanstalt (PTB) a laser optical volume flow rate standard (LFS) has been developed to calibrate flow meters on site within a power plant. The velocity profile within the pipe is measured with Laser Doppler Anemometry (LDA). The profile is integrated to calculate the volume flow rate. Since conventional LDA has a measuring volume length of about 2 mm, the near wall region cannot be resolved. This leads to an offset of the volume flow rate of about 1.3 %. To overcome this limitation high resolution LDA (HR-LDA) was developed. Therefore, a LDA measuring volume with constant fringe spacing is overlaid with an LDA measuring volume with divergent fringe spacing. In this way, the position of a particle passing the measuring volume can be determined with a resolution of 50 μm. With the HR-LDA the influence of the near wall region on the volume flow rate was reduced from 1.3 % to 0.04 %. Overall an uncertainty of 0.19 % (k=2) for the LFS was achieved. A comparison of the LFS with the national primary standard for thermal energy (WZP) at PTB with an uncertainty of 0.04 % (k=2) revealed a maximum deviation of 0.07 %. |
Zitierung
Juling, M., Steinbock, J., Kraume, M., & Lederer, T. (2016). LDA volume flow rate standard for water using high spatial resolution LDA for traceable measurements in power plants. 17th International Flow Measurement Conference FLOMEKO 2016, Sydney, 26-29, September, 2016, Australia.