Analytical Consideration Regarding Influence of Hot-Wire Contamination on Flow-Speed Measurement

1976 ◽  
Vol 15 (4) ◽  
pp. 731-732 ◽  
Author(s):  
Kazutoshi Kawashima ◽  
Suketsugu Nakanishi
Keyword(s):  
Flow Speed ◽  
Hot Wire ◽  
Speed Measurement ◽  
Analytical Consideration

Experimental Consideration Regarding Influence of Hot-Wire Contamination on Flow-Speed Measurement

1975 ◽  
Vol 14 (10) ◽  
pp. 1639-1640 ◽  
Author(s):  
Kazutoshi Kawashima ◽  
Suketsugu Nakanishi
Keyword(s):  
Flow Speed ◽  
Hot Wire ◽  
Speed Measurement

scholarly journals Temperature-compensated fiber-optic gas flow speed sensor based on the ‘Hot-wire’ principle

Optik ◽  
2020 ◽  
pp. 166118
Author(s):  
Zhen Li ◽  
Jiqiang Wang ◽  
Xiaoxing Zhong ◽  
Tongyu Liu ◽  
Yanong Ning ◽  
...  
Keyword(s):  
Gas Flow ◽  
Fiber Optic ◽  
Flow Speed ◽  
Hot Wire ◽  
Speed Sensor

Local flow speed measurement using tunable ac thermal anemometry

2005 ◽  
Vol 19 (7) ◽  
pp. 1449-1459 ◽  
Author(s):  
Won Seok Chung ◽  
Ohmyoung Kwon ◽  
Joon Sik Lee ◽  
Young Ki Choi ◽  
Seungho Park
Keyword(s):  
Flow Speed ◽  
Local Flow ◽  
Speed Measurement

Measurement of the Instantaneous Velocity Gradients in Plane and Axisymmetric Turbulent Wake Flows

2001 ◽  
Vol 124 (1) ◽  
pp. 143-153 ◽  
Author(s):  
T. Schenck ◽  
J. Jovanovic´
Keyword(s):  
Correction Method ◽  
Flow Speed ◽  
Low Flow ◽  
Sphere Diameter ◽  
Hot Wire ◽  
Local Isotropy ◽  
Plane Wake ◽  
Good Spatial Resolution ◽  
Pressure Transport ◽  
Derivatives Of

All first-order spatial derivatives of the turbulent velocity fluctuations were measured using a pair of X hot-wire probes. Measurements were performed in the self-preserving region of a turbulent plane wake downstream of a cylinder and in an axisymmetric wake behind the sphere. Good spatial resolution of the measurements was ensured by choosing small values for the cylinder/sphere diameter and a low flow speed. Errors due to the finite hot-wire length and the wire and probe separation were analyzed using Wyngaard’s correction method. The derived corrections were verified experimentally. The measuring technique and the experimental results were systematically checked and compared with the results available in the literature. The assumptions of local isotropy and local axisymmetry were examined. Both investigated flows deviate only moderately from local isotropy and local axisymmetry. Support for the measured results is provided by plotting the data on an anisotropy invariant map. The budgets of the turbulent kinetic energy were computed from the measured data. In contrast to the results obtained in the plane wake, where the pressure transport is nearly negligible, in the axisymmetric wake it was found to play an important role and closely follows the estimate made by Lumley, uip¯/ρ≈−0.2q2ui¯.

Ultrasound Open Channel Flow-Speed Measurement Based on the Lateral Directional Echo Observations

2012 ◽  
Vol 51 (7S) ◽  
pp. 07GB13 ◽  
Author(s):  
Ichiro Nishimura ◽  
Mitsuhide Ishigamori ◽  
Akira Yamada
Keyword(s):  
Channel Flow ◽  
Open Channel ◽  
Open Channel Flow ◽  
Flow Speed ◽  
Speed Measurement

Measurement of Intake Valve/Cylinder Boundary Flows Using a Multiple Orientation Hot-Wire Technique

1988 ◽  
Vol 110 (4) ◽  
pp. 361-366 ◽  
Author(s):  
T. C. Wagner ◽  
J. C. Kent
Keyword(s):  
Flow Direction ◽  
Sequential Sampling ◽  
Effective Area ◽  
Flow Speed ◽  
Intake Valve ◽  
Hot Wire ◽  
Mean Velocity ◽  
Local Flow ◽  
Discharge Coefficients ◽  
Velocity Magnitude

A new measurement method is utilized to determine velocity distributions on the intake-valve/cylinder boundary for different induction system designs. The velocity information is being used to calculate the angular momentum flux and to define local discharge coefficients around the valve periphery. The contribution of local flow direction (effective area) and local flow speed (velocity losses) to the global discharge coefficients is examined. The dependence of the discharge coefficient on the flow direction and mean velocity magnitude provides useful diagnostic data to relate intake port geometry and flow performance. The measurement technique is also described in detail. The directional response of a single hot-wire anemometer is utilized along with sequential sampling of the signal as the probe shaft is rotated through 360 deg. Within the range of velocity and flow direction required, the velocity magnitude and direction can be determined to within 2 percent and 2 deg, respectively.

scholarly journals In vivo flow speed measurement of capillaries by photoacoustic correlation spectroscopy

2011 ◽  
Vol 36 (20) ◽  
pp. 4017 ◽  
Author(s):  
Sung-Liang Chen ◽  
Zhixing Xie ◽  
Paul L. Carson ◽  
Xueding Wang ◽  
L. Jay Guo
Keyword(s):  
Flow Speed ◽  
Correlation Spectroscopy ◽  
Speed Measurement

scholarly journals In vivo deep-brain blood flow speed measurement through third-harmonic generation imaging excited at the 1700-nm window

2020 ◽  
Vol 11 (5) ◽  
pp. 2738 ◽  
Author(s):  
Hongji Liu ◽  
Xinlin Chen ◽  
Xiangquan Deng ◽  
Ziwei Zhuang ◽  
Shen Tong ◽  
...  
Keyword(s):  
Blood Flow ◽  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Flow Speed ◽  
Brain Blood Flow ◽  
Third Harmonic ◽  
Speed Measurement ◽  
Deep Brain
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