A Guide to Uncertainty Analysis of Hot-Wire Data

[+] Author and Article Information
S. Yavuzkurt

Department of Mechanical Engineering, The Pennsylvania State University, University Park, Pa. 16802

J. Fluids Eng 106(2), 181-186 (Jun 01, 1984) (6 pages) doi:10.1115/1.3243096 History: Received August 30, 1982; Online October 26, 2009


Uncertainty analysis of hot-wire data in turbulent flows are made for time-averaging and real-time data reduction techniques. Equations of uncertainty are derived in general form for every step of data taking and evaluation. Numerical examples are supplied for two-dimensional flat plate boundary layer data. Results show that the real-time data reduction techniques generally have a lower and much more uniform uncertainty distribution than the time-averaging techniques (whose uncertainties are much higher for the near-wall data).

Copyright © 1984 by ASME
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