Detail publikace

Power Spectral Density of Velocity Fluctuations Estimated from Phase Doppler Data

JEDELSKÝ, J. LÍZAL, F. JÍCHA, M.

Originální název

Power Spectral Density of Velocity Fluctuations Estimated from Phase Doppler Data

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

Laser Doppler Anemometry (LDA) and its modifications such as Phase-Doppler Particle Anemometry (P/DPA) is point-wise method for optical non-intrusive measurement of particle velocity with high data rate. Conversion of the LDA velocity data from temporal to frequency domain – calculation of power spectral density (PSD) of velocity fluctuations, is a non trivial task due to non-equidistant data sampling in time. We briefly discuss possibilities for the PSD estimation and specify limitations caused by seeding density and other factors of the flow and LDA setup. Arbitrary results of LDA measurements are compared with corresponding Hot Wire Anemometry (HWA) data in the frequency domain. Slot correlation (SC) method implemented in software program Kern by Nobach (2006) is used for the PSD estimation. Influence of several input parameters on resulting PSDs is described. Optimum setup of the software for our data of particle-laden air flow in realistic human airway model is documented. Typical character of the flow is described using PSD plots of velocity fluctuations with comments on specific properties of the flow. Some recommendations for improvements of future experiments to acquire better PSD results are given.

Klíčová slova

Power Spectral Density, Velocity Fluctuations, Phase Doppler Anemometry

Autoři

JEDELSKÝ, J.; LÍZAL, F.; JÍCHA, M.

Rok RIV

2011

Vydáno

22. 11. 2011

Nakladatel

EDP Sciences

Místo

Liberec, Czech Republic

ISBN

978-80-7372-784-0

Kniha

EPJ Web of Conferences

Edice

1

ISSN

2100-014X

Periodikum

EPJ Web of Conferences

Ročník

25

Číslo

1

Stát

Francouzská republika

Strany od

219

Strany do

226

Strany počet

8

URL

http://www.epj-conferences.org/articles/epjconf/abs/2012/07/epjconf_EFM2011_01034/epjconf_EFM2011_01034.html

Plný text v Digitální knihovně

http://hdl.handle.net/11012/194222

BibTex

@inproceedings{BUT75134,
  author="Jan {Jedelský} and František {Lízal} and Miroslav {Jícha}",
  title="Power Spectral Density of Velocity Fluctuations Estimated from Phase Doppler Data",
  booktitle="EPJ Web of Conferences",
  year="2011",
  series="1",
  journal="EPJ Web of Conferences",
  volume="25",
  number="1",
  pages="219--226",
  publisher="EDP Sciences",
  address="Liberec, Czech Republic",
  doi="10.1051/epjconf/20122501034",
  isbn="978-80-7372-784-0",
  issn="2100-014X",
  url="http://www.epj-conferences.org/articles/epjconf/abs/2012/07/epjconf_EFM2011_01034/epjconf_EFM2011_01034.html"
}