Effect of cold wire inclination on temperature fluctuation measurements in a heated jet

Bremhorst, K and Anderson, SM (2003) Effect of cold wire inclination on temperature fluctuation measurements in a heated jet. Experimental Thermal And Fluid Science, 27 2: 199-206. doi:10.1016/S0894-1777(02)00284-4


Author Bremhorst, K
Anderson, SM
Title Effect of cold wire inclination on temperature fluctuation measurements in a heated jet
Journal name Experimental Thermal And Fluid Science   Check publisher's open access policy
ISSN 0894-1777
Publication date 2003-01-01
Sub-type Article (original research)
DOI 10.1016/S0894-1777(02)00284-4
Volume 27
Issue 2
Start page 199
End page 206
Total pages 8
Place of publication NY, USA
Publisher Elsevier Science Inc.
Language eng
Subject C1
291803 Turbulent Flows
780102 Physical sciences
Abstract Hot-wire anemometers at low operating currents are used as fast response resistance thermometers for the study of heated turbulent flows. Simultaneous measurement of temperature and velocity is generally performed with multi-wire arrays. In order to give good spatial resolution a new layout has been tested which uses an inclined temperature wire positioned parallel to the nearest inclined velocity wire. This leads to an asymmetric wire arrangement relative to the mean flow direction. As expected, a reduction in thermal interference from the velocity wires results when compared with an array containing a temperature wire placed normal to the flow. However, measurement of higher order moments of fluctuating quantities in an axisymmetric jet shows considerable distortion of radial distributions which is traced to alteration of the temperature field sensed by the temperature wire. When inclined velocity sensitive wires contain a temperature component, the latter may be affected by the same phenomenon.
Keyword Thermodynamics
Engineering, Mechanical
Physics, Fluids & Plasmas
Velocity
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 05:27:09 EST