Reprinted from AIAA Journal, Volume 41, Issue 8, August 1, 2003, pages 1438-1443. Reprinted with permission from the American Institute of Aeronautics and Astronautics, Inc. Publisher website: http://www.aiaa.org/content.cfm?pageid=2
NOTE: At the time of publication, the author William Durgin was not yet affiliated with Cal Poly.
Ultrasonic measurement techniques can be used to determine some characteristics of turbulent flows. In this work measurements of the difference in propagation times of ultrasonic waves along two paths are combined with the Kolmogorov (2/3)-power law to study characteristics of grid-generated turbulence. The paper focuses on ultrasonic measurements of turbulent flow using the travel-time technique. The present research is of interest from two points of view. First, it demonstrates an ultrasonic method of investigation of turbulence, and second, it furthers understanding of the effect of turbulence on sound propagation.