Evaluation of instruments for turbulence measurements at 1 km and 13.5 km ranges

2021 ◽  
Author(s):  
Matthew Salfer-Hobbs ◽  
Thomas Miletich ◽  
Joseph Coffaro ◽  
Hannah Kimble-Williams
Keyword(s):  
Turbulence Measurements

A note on wind-tunnel turbulence measurements with DPIV

2008 ◽  
Vol 46 (3) ◽  
pp. 527-537 ◽  
Author(s):  
G. R. Spedding ◽  
A. Hedenström ◽  
L. C. Johansson
Keyword(s):  
Wind Tunnel ◽  
Turbulence Measurements

scholarly journals Fabrication of freestanding Pt nanowires for use as thermal anemometry probes in turbulence measurements

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Hai Le-The ◽  
Christian Küchler ◽  
Albert van den Berg ◽  
Eberhard Bodenschatz ◽  
Detlef Lohse ◽  
...  
Keyword(s):  
Room Temperature ◽  
Fluid Velocity ◽  
Current Mode ◽  
Constant Current ◽  
Small Scale ◽  
Turbulence Measurements ◽  
High Dynamic ◽  
Scale Turbulence ◽  
Constant Current Mode ◽  
Pt Nanowires

AbstractWe report a robust fabrication method for patterning freestanding Pt nanowires for use as thermal anemometry probes for small-scale turbulence measurements. Using e-beam lithography, high aspect ratio Pt nanowires (~300 nm width, ~70 µm length, ~100 nm thickness) were patterned on the surface of oxidized silicon (Si) wafers. Combining wet etching processes with dry etching processes, these Pt nanowires were successfully released, rendering them freestanding between two silicon dioxide (SiO2) beams supported on Si cantilevers. Moreover, the unique design of the bridge holding the device allowed gentle release of the device without damaging the Pt nanowires. The total fabrication time was minimized by restricting the use of e-beam lithography to the patterning of the Pt nanowires, while standard photolithography was employed for other parts of the devices. We demonstrate that the fabricated sensors are suitable for turbulence measurements when operated in constant-current mode. A robust calibration between the output voltage and the fluid velocity was established over the velocity range from 0.5 to 5 m s−1 in a SF6 atmosphere at a pressure of 2 bar and a temperature of 21 °C. The sensing signal from the nanowires showed negligible drift over a period of several hours. Moreover, we confirmed that the nanowires can withstand high dynamic pressures by testing them in air at room temperature for velocities up to 55 m s−1.

Silicon based flow sensors used for mean velocity and turbulence measurements

1992 ◽  
Vol 12-12 (4-5) ◽  
pp. 270-276 ◽  
Author(s):  
L. Löfdahl ◽  
G. Stemme ◽  
B. Johansson
Keyword(s):  
Flow Sensors ◽  
Mean Velocity ◽  
Turbulence Measurements ◽  
Silicon Based

Turbulence measurements for heated gas slot injection in supersonic flow

AIAA Journal ◽  
1990 ◽  
Vol 28 (9) ◽  
pp. 1605-1614 ◽  
Author(s):  
C. R. Hyde ◽  
B. R. Smith ◽  
J. A. Schetz ◽  
D. A. Walker
Keyword(s):  
Supersonic Flow ◽  
Turbulence Measurements

A method of turbulence measurements from a moored reciprocating vertical profiler based on buoyancy-driven

2016 ◽  
Author(s):  
Shengbo Zang ◽  
Xinjian Fan ◽  
Haojie Wang ◽  
Dalei Song ◽  
Xiuyan Liu ◽  
...  
Keyword(s):  
Turbulence Measurements

scholarly journals Pedestal magnetic turbulence measurements in ELMy H-mode DIII-D plasmas by Faraday-effect polarimetry

2021 ◽  
Vol 28 (2) ◽  
pp. 022506
Author(s):  
J. Chen ◽  
D. L. Brower ◽  
W. X. Ding ◽  
Z. Yan ◽  
M. Curie ◽  
...  
Keyword(s):  
Faraday Effect ◽  
Turbulence Measurements ◽  
Magnetic Turbulence
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