A miniature triple hot-wire probe for wall bounded flows |
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| Authors: | J M Bruns P Dengel |
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| Institution: | Hermann-F?ttinger-Institut, Technische Universit?t Berlin, Müller-Breslau-Str. 8, D-10623 Berlin, Germany and Institut de Machines Hydrauliques et de Mécanique des Fluides, Ecole Polytechnique Fédérale de Lausanne, Ecublens, CH-1015 Lausanne, Switzerland, DE
Fluid Engineering, Ingenieurbüro für Str?mungstechnik, Ochsenberg 7, D-67659 Kaiserslautern, Germany, DE
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| Abstract: | Four orthogonal and one non-orthogonal miniature triple hot-wire probes have been developed and tested in a two-dimensional
turbulent boundary layer. The influence of the different wire configurations on measurements of the Reynolds stresses has
been studied. A directional calibration with an analytical solution for the wire response equations was used for the measurements
of the non-orthogonal probe and was tested for the orthogonal probes in order to correct their possible geometrical imperfections.
It is shown that a directional calibration does not significantly improve the quality of the measurements for precisely manufactured
orthogonal probes and that measuring errors are related rather to the measuring volume, the size of the domain of unique solutions
for the instantaneous velocity vector and interference effects, i.e. the wire configuration itself.
Received: 7 February 1997/Accepted: 18 November 1997 |
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