PURPOSE: An anemometer for finding wind speed using an afterimage effect of colored weather vane cups is provided to calculate wind speed by a qualitative speed feeling, not a measured value. CONSTITUTION: A vane includes a red cup(101), a green cup(102), a blue cup(103), and a white ...
A Laser Doppler Anemometer (LDA) system was used to provide an independent reference measurement of velocity. The instrument, which provides a point measurement of velocity, was positioned in such a way that the measurement point was in plane with the PIV laser sheet. Figure 2 Raw images from...
The magnified cross-section of the LDV probe volume fringe field created on a far screen (image plane) with an imaging lens is examined both analytically and experimentally. It is shown that measurements of the image plane fringe field can be used to quantitatively determine the fringe field exi...
The wheel assembly includes a front portion having an inner surface and at least one projector, wherein the at least one projector is configured to rotate with the wheel assembly and to project an image across at least a portion of the inner surface during game play....
5 ?m diameter, 1.2 mm length Constant temperature anemometer ? Used for mean and instantaneous (fluctuating) velocity measurements ? Principle of operation: Sensor resistance is changed by the flow over the probe and the cooling taking place is related through calibration to the velocity of the ...
One of the most challenging and time-consuming problems in experimental fluid mechanics is the measurement of the overall flow field properties, such as the velocity, vorticity, and pressure fields. Local measurements of the velocity field (i.e., at indi
In both field campaigns the results are compared against a sonic anemometer, as the reference instrument. The measurements clearly show that the image-reject architecture results in more accurate measurements of radial wind velocities close to zero. Close-to-zero velocities are usually associated with...
In both field campaigns the results are compared against a sonic anemometer, as the reference instrument. The measurements clearly show that the image-reject architecture results in more accurate measurements of radial wind velocities close to zero. Close-to-zero velocities are usually associated with...
Two measurement parameters used in the density correlation method and the gray level difference accumulation method of the PIV system, an interrogation region and a search region, were experimentally investigated by comparing the velocity distributions measured by a Laser Doppler Anemometer and the PIV....
W.H. Ahmed, Experimental investigation of air-oil slug flow using capacitance probes, hot-film anemometer, and image processing, Int. J. Multiphase Flow 37 (8) (2011) 876-887.Ahmed, W. H. Experimental investigation of air-oil slug flow using capacitance probes, hot-film anemometer, and ...