An Experimental Investigation into the Use of Hot-Film Anemometry to Measure Vortical Velocity Behind a Pitching Wing

1990 ◽  
Author(s):  
C. B. Harmon ◽  
William Dieterich
2018 ◽  
Vol 168 ◽  
pp. 07008
Author(s):  
Erik Flídr ◽  
Tomáš Jelínek

Topic of this contribution is the detection of the laminar-turbulent boundary layer transition on the prismatic blade using infrared thermography. Several Reynolds and Mach numbers were investigated, and their influence on the boundary layer transition was evaluated. Results are in good agreement with experiments that were performed earlier with hot-film anemometry.


1988 ◽  
Vol 16 (2) ◽  
pp. 235-238
Author(s):  
Subhashis Nandy ◽  
Alex Yefim Bekker ◽  
Gregory Allen Winchell ◽  
John Francis O'Riordan

Author(s):  
G. Mimmi

Abstract In a previous paper the author proposed a method to reduce the periodic variation in flow rate for an external gear pump. To verify the experimental results, a series of experimental tests on a expressly realized gear pump, was carried out. The pump was equipped with relieving grooves milled into the side plates. The tests were done on a closed piping specifically realized and equipped for measuring the instantaneous flow rate of the fluid through a wedge-shaped hot film probe.


1988 ◽  
Vol 21 (3) ◽  
pp. 235-247 ◽  
Author(s):  
J.M. Hasenkam ◽  
D. Westphal ◽  
H. Nygaard ◽  
H. Reul ◽  
M. Giersiepen ◽  
...  

Author(s):  
Volker Browarzik

Unsteady flow measurements were performed to investigate the internal flow field of a torque converter, especially unsteady rotor/rotor-interaction in the region between pump exit and turbine inlet. Instantaneous flow data were measured with hot-film probes and a computer based data acquisition system. The commonly used ensemble averaging method was adapted to this special case with two independently rotating impellers. Velocity profiles of the flow in the relative frame of reference of the pump impeller were evaluated and they were used to generate a computer animation. The paper gives an overview over the test facilities and the background of the present investigations. It follows a discussion of some essential aspects concerning the use of hot-film anemometry. The methods used to evaluate the data are described in detail and measuring results of the region between pump exit and turbine inlet are presented.


1981 ◽  
Vol 110 ◽  
pp. 115-128 ◽  
Author(s):  
G. Comte-Bellot ◽  
G. Charnay ◽  
J. Sabot

The European Mechanics Colloquium, Euromech 132, was held at the Ecole Centrale de Lyon from 2 to 4 July 1980. Specific areas of hot-wire or hot-film anemometry were presented and discussed, more especially the effect of the finite time constant of the wire supports, the use of yawed hot wires in supersonic flows, the possible improvement of vorticity meters, and multi-point measurements of wall-shear-stress fluctuations. Other subjects described during the meeting included a new technique for concentration measurements in flames, developments and new uses of digitization and conditional sampling, pattern recognition analysis of fluid flow from multi-point, multi-time velocity measurements, and new turbulence measurements in complex flows and in fluid-flow machinery.An exhibition of hot-wire and hot-film anemometers and associated equipment was held during the colloquium.


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