Publication Date:
2016
Short description:
Experimental study on hot-wire spatial resolution in turbulent round jet / Fiorini, T., Bellani, G., Cimarelli, A., Talamelli, A. (SPRINGER PROCEEDINGS IN PHYSICS). - In: Springer Proceedings in PhysicsHEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY : Springer Science and Business Media, LLC, 2016. - ISBN 978-3-319-29129-1. - pp. 249-252 [10.1007/978-3-319-29130-7_43]
abstract:
Hot-wire spatial-resolution effects are investigated in a round jet, using custom-made probes with Platinum wires of 5 and 2.5 μmof diameter. Characteristic turbulent scales are varied by both moving the probes along the jet centerline (10 < x/D < 30), and using two different nozzle diameters at a constant Reynolds number of ReD = 7 × 104. The variance of spatial derivatives shows an attenuation of one order of magnitude greater than the velocity variance, i.e. 10-30% compared to 1-2%. Power spectra show this attenuation to be located at high frequencies, in agreement with the hypothesis of spatial-filtering effect.
Iris type:
Capitolo/Saggio
List of contributors:
Fiorini, T.; Bellani, G.; Cimarelli, A.; Talamelli, A.
Book title:
Springer Proceedings in Physics
Published in: