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2013 | 11 | 11 | 1616-1622
Tytuł artykułu

Experimental investigation of supersonic flow over elliptic surface

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The coherent structures of flow over a compression elliptic surface are experimentally investigated in a supersonic low-noise wind tunnel at Mach Number 3 using nano-tracer planar laser scattering (NPLS) and particle image velocimetry (PIV) techniques. High spacial resolution images and the average velocity profiles of both laminar inflow and turbulent inflow over the testing model were captured. From statistically significant ensembles, spatial correlation analysis of both cases is performed to quantify the mean size and orientation of large structures. The results indicate that the mean structure is elliptical in shape and structure angles in separated region of laminar inflow are slightly smaller than that of turbulent inflow. Moreover, the structure angle of both cases increases with its distance away from from the wall. POD analysis of velocity and vorticity fields is performed for both cases. The energy portion of the first mode for the velocity data is much larger than that for the vorticity field. For vorticity decompositions, the contribution from the first mode for the laminar inflow is slightly larger than that for the turbulent inflow and the cumulative contributions for laminar inflow converges slightly faster than that for turbulent inflow
Wydawca

Czasopismo
Rocznik
Tom
11
Numer
11
Strony
1616-1622
Opis fizyczny
Daty
wydano
2013-11-01
online
2013-12-10
Twórcy
autor
  • College of Aerospace Science and Engineering, National University of Defense Technology, 410073, Changsha, China, zhang_qinghu@163.com
autor
  • College of Aerospace Science and Engineering, National University of Defense Technology, 410073, Changsha, China
autor
  • College of Aerospace Science and Engineering, National University of Defense Technology, 410073, Changsha, China, ysh_1819@126.com
autor
  • College of Aerospace Science and Engineering, National University of Defense Technology, 410073, Changsha, China
autor
  • College of Aerospace Science and Engineering, National University of Defense Technology, 410073, Changsha, China
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11534-013-0298-x
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