- Tytuł:
- Comparison of single and X-wire measurements of streamwise velocity fluctuations in turbulent boundary layer
- Autorzy:
-
Dróżdż, A.
Elsner, W. - Powiązania:
- https://bibliotekanauki.pl/articles/281655.pdf
- Data publikacji:
- 2014
- Wydawca:
- Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
- Tematy:
-
turbulent boundary layer
energy spectra
hot-wire spatial resolution - Opis:
- The paper discusses the problem of measuring velocity fluctuations of a turbulent boundary layer using single and X-wire probes. It seems that the difference between the streamwise fluctuating component of these two probes results not only from spatial resolution, but also from influence of the wall-normal fluctuating component, which is usually not considered. It was shown that the vector summing these two components obtained from X-wire probe gives the shape of fluctuation distribution obtained from a single-wire probe. It implies that the underestimation of the near-wall peak of streamwise fluctuating component in X-wire measurements results from disregarded wall-normal fluctuations, which is obviously taken in the case of a single-wire probe. Moreover, it was shown that the criteria for wire length i.e. l+ ≤ 20 could not be sufficient to properly estimate the streamwise and wall-normal fluctuations.
- Źródło:
-
Journal of Theoretical and Applied Mechanics; 2014, 52, 2; 499-505
1429-2955 - Pojawia się w:
- Journal of Theoretical and Applied Mechanics
- Dostawca treści:
- Biblioteka Nauki
Artykuł