scholarly journals Power law of decaying homogeneous isotropic turbulence at low Reynolds number

2006 ◽  
Vol 73 (6) ◽  
Author(s):  
P. Burattini ◽  
P. Lavoie ◽  
A. Agrawal ◽  
L. Djenidi ◽  
R. A. Antonia
1994 ◽  
Vol 6 (2) ◽  
pp. 808-814 ◽  
Author(s):  
N. N. Mansour ◽  
A. A. Wray

2005 ◽  
Vol 2005 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Takayuki Matsunuma ◽  
Yasukata Tsutsui

The unsteady flow field downstream of axial-flow turbine rotors at low Reynolds numbers was investigated experimentally using hot-wire probes. Reynolds number, based on rotor exit velocity and rotor chord lengthReout,RT, was varied from3.2×104to12.8×104at intervals of1.0×104by changing the flow velocity of the wind tunnel. The time-averaged and time-dependent distributions of velocity and turbulence intensity were analyzed to determine the effect of Reynolds number. The reduction of Reynolds number had a marked influence on the turbine flow field. The regions of high turbulence intensity due to the wake and the secondary vortices were increased dramatically with the decreasing Reynolds number. The periodic fluctuation of the flow due to rotor-stator interaction also increased with the decreasing Reynolds number. The energy-dissipation thickness of the rotor midspan wake at the low Reynolds numberReout,RT=3.2×104was1.5times larger than that at the high Reynolds numberReout,RT=12.8×104. The curve of the−0.2power of the Reynolds number agreed with the measured energy-dissipation thickness at higher Reynolds numbers. However, the curve of the−0.4power law fitted more closely than the curve of the−0.2power law at lower Reynolds numbers below6.4×104.


2000 ◽  
Vol 33 (4) ◽  
pp. 675-678 ◽  
Author(s):  
Shinichi Ookawara ◽  
Kohei Ogawa ◽  
Norman Dombrowski ◽  
Esmail Amooie-Foumeny ◽  
Ahmed Riza

2018 ◽  
Vol 12 (3) ◽  
pp. 255
Author(s):  
Muhammad Zal Aminullah Daman Huri ◽  
Shabudin Bin Mat ◽  
Mazuriah Said ◽  
Shuhaimi Mansor ◽  
Md. Nizam Dahalan ◽  
...  

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