Turbulence Measurements by Time-Resolved Stereoscopic PIV

2005 ◽  
Vol 25 (96) ◽  
pp. 8-13_1 ◽  
Author(s):  
Mamoru TANAHASHI ◽  
Gyoung-Min CHOI ◽  
Masayuki ITAKURA ◽  
Toshio MIYAUCHI
Keyword(s):  
Time Resolved ◽  
Stereoscopic Piv ◽  
Turbulence Measurements

Fourier Decomposed Turbulence Measurements Downstream of a High-Pressure Turbine Stage

2008 ◽  
Author(s):  
Lars-Uno Axelsson ◽  
William K. George ◽  
T. Gunnar Johansson
Keyword(s):  
High Pressure ◽  
Periodic Component ◽  
Turbine Stage ◽  
High Pressure Turbine ◽  
Time Resolved ◽  
Velocity Fluctuations ◽  
Axial Turbine ◽  
Blade Passage ◽  
Turbulence Measurements ◽  
Time Resolved Measurements

This forum paper discusses phase-resolved turbulence measurements of the flow downstream of an axial turbine, and especially how phase-resolved measurements compare to time-resolved measurements. The time-resolved spectra produced higher velocity fluctuations than the corresponding phase-resolved spectra even when the periodic component was filtered out from the time-resolved measurements. The phase-resolved spectrum effectively removes all the peaks in the spectrum except for the ones associated with the blade-passage frequency.

scholarly journals E214 Development of Time-Resolved Dual-Plane Stereoscopic PIV

2006 ◽  
Vol 2006 (0) ◽  
pp. 351-352
Author(s):  
Tetsu Hirayama ◽  
Mamoru Tanahashi ◽  
Toshio Miyauchi
Keyword(s):  
Time Resolved ◽  
Stereoscopic Piv ◽  
Dual Plane

scholarly journals 3D pressure field reconstruction from time-resolved stereoscopic PIV measurements by relaxation of Taylor's hypothesis

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Dominique Fratantonio ◽  
John James Charonko
Keyword(s):  
Pressure Field ◽  
National Laboratory ◽  
Reconstruction Algorithm ◽  
Turbulent Channel Flow ◽  
Reconstruction Method ◽  
Time Resolved ◽  
Material Derivative ◽  
Stereoscopic Piv ◽  
Air Jet ◽  
Taylor’S Hypothesis

This work presents reconstructions of 3D pressure fields starting from 2D3C stereoscopic-PIV (SPIV) measurements. In Fratantonio et al. (2021), we presented a new reconstruction algorithm, the “Instantaneous convection” method, capable of producing 3D velocity fields from time-resolved SPIV measurements. For reconstructions in flows with strong shear layers and high turbulence intensity, this method is able to provide time-resolved 3D velocity volumes that are more accurate than those that can be obtained from the more frequently employed reconstruction method based on the Taylor’s hypothesis and on the use of a mean convective field. Here we investigate the possibility of reconstructing the 3D pressure field from the timeresolved series of reconstructed 3D velocity data. A pseudo-tracking method is employed for computing the velocity material derivative, and the pressure field is then reconstructed by solving the 3D Poisson equation. The velocity and pressure reconstructions are validated on the Direct Numerical Simulation data of the turbulent channel flow taken from the John Hopkins Turbulence Database (JHTDB), and an application to experimental SPIV measurements of an air jet flow in coflow carried out at the Turbulent Mixing Tunnel (TMT) facility at Los Alamos National Laboratory is presented.

1712 Sound Source Investigation in Turbulence by the Time-Resolved Stereoscopic PIV

2007 ◽  
Vol 2007.7 (0) ◽  
pp. 143-144
Author(s):  
Koichi OBANA ◽  
Mamoru TANAHASHI ◽  
Toshio MIYAUCHI
Keyword(s):  
Sound Source ◽  
Time Resolved ◽  
Stereoscopic Piv

scholarly journals Visualization of Sound Source in Turbulence by the Time-Resolved Stereoscopic PIV

2007 ◽  
Vol 27 (Supplement2) ◽  
pp. 135-136 ◽  
Author(s):  
Koichi OBANA ◽  
Mamoru TANAHASHI ◽  
Toshio MIYAUCHI
Keyword(s):  
Sound Source ◽  
Time Resolved ◽  
Stereoscopic Piv
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