Quadruple hot-wire probes in a simulated wall flow

✍ Scribed by L. Pompeo; H. Thomann

• Book ID: 104656730
• Publisher: Springer
• Year: 1993
• Tongue: English
• Weight: 698 KB
• Volume: 14
• Category: Article
• ISSN: 0723-4864
• DOI: 10.1007/bf00189503

✦ Synopsis

A method for calibration and measurement with a fourwire probe is described. The method does not require any assump-~'--~[ tion about the response of the wires and it is not necessary to know the exact probe geometry. Measurements in a two-dimensional turbulent boundary layer showed large errors in the v' w' shear stress, although the probe had a wire arrangement practically insensitive to mean velocity gradients normal to the wall. The problem seems to / ~. be caused by the strong instantaneous spanwise velocity gradients, ""as suggested by the computed response of a simple probe model \ inserted into a numerical flow obtained by direct simulation.