EXPERIMENTAL INVESTIGATION OF STATISTICAL MOMENTS OF TRAVEL TIME IN GRID-GENERATED TURBULENCE

An experimental tech nique for investigation of the behavior of acoustic wave propagation through a turbulent medium is discussed. The present study utilizes the ultrasonic travel -time technique to diagnose a grid -generated turbulence. The statistics of the travel -time variat ions of ultrasonic wave propagation along a path are used to determine some metrics of the turbulence. Experimental data obtained using ultrasonic technique confirms numerical and theoretical predictions of nonlinear increase of the first -order travel time variance with propagation distance.