STUDY OF THE TURBULENT AXISYMMETRIC JET.

This study presents the results of an effort to explore the possible causes for the loss of momentum in previous axisymmetric turbulent jets measurements. Momentum-conserving data taken with a laser Doppler anemometer using the burst-processor technique are reported. The data have been found to agree with theoretical predictions based on a Reynolds stress model for the turbulence. From a simple model for the back flow of a jet in a finite environment, it is concluded that the major source of error in previous experiments has been the flow facility itself, and not primarily the measurement technique utilized as suspected earlier.