| Zugriffsnummer | 18072 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Heterodyne laser-Doppler line-sensor for highly resolved velocity measurements of shear flows |
| Autor(in); Institution |
Shirai, K.; TU Dresden, Dresden, GERMANY
Büttner, Lars; TU Dresden, Dresden, GERMANY
Czarske, Jürgen; TU Dresden, Dresden, GERMANY
Müller, Harald; 1.4, Gase, PTB-Braunschweig
Durst, Franz; Lehrstuhl für Strömungsmechanik (LSTM) Uni Erlangen, Erlangen, GERMANY
|
| Quelle/Jahr | Flow Measurement and Instrumentation: 16 (2005), 4, 221 - 228 |
| ISSN | 0955-5986 |
| DOI | |
| Verlag | Elsevier |
| Freie Schlagworte | Laser Doppler anemometer ; Heterodyne technique ; Wavelength division muliplexing ; Velocity profile near the wall ; Wall shear stress |
| Zusammenfassung | We report on the application of a heterodyne laser-Doppler line-sensor for spatially highly resolved shear flow measurements. The line-sensor employs a wavelength-division-multiplexing (WDM) technique, which generates a measurement volume with convergent and divergent fringes for two laser wavelength, respectively. The evaluation of the ratio of the resulting two Doppler frequencies yields the particle velocity and position inside the measurement volume with a resolution of a few micrometers. A line sensor with directional discrimination was realized by using a heterodyne technique. The measurements signal is generated in the intermediate frequency band, allowing the evaluation of small velocities with high accuracy. We report on the measurement of laminar boundary layers and for the determination of the wall shear stress. Good agreement was obtained between the measured velocity and the Blasius solution. |
Zitierung
Shirai, K., Büttner, L., Czarske, J., Müller, H., & Durst, F. (2005). Heterodyne laser-Doppler line-sensor for highly resolved velocity measurements of shear flows. Flow Measurement and Instrumentation, 16(4), 221–228. https://doi.org/10.1016/j.flowmeasinst.2005.04.003