Accession Number:

ADA043041

Title:

Turbulence Measurements of a Two-Dimensional Helium Jet in a Moving Airstream.

Descriptive Note:

Technical rept.,

Corporate Author:

PURDUE UNIV LAFAYETTE IND PROJECT SQUID HEADQUARTERS

Report Date:

1977-07-01

Pagination or Media Count:

69.0

Abstract:

Measurements of the streamwise velocity component and the concentration of helium are made in a two-dimensional helium jet discharging into a moving airstream. The transverse distribution of the unconditioned and conditioned statistics of the velocity and helium concentration at various downstream positions are presented. In addition, range conditioned point statistics provide information on the structure of turbulent zones of various durations. The gross properties of the jet agree with previous data. Entrainment is found to occur on the leeward edges of the turbulent zones because the turbulent fluid is moving faster than the external stream these edges are on the upstream end of the zones. The interfaces as given by the velocity and concentration cannot be distinguished and are found to be relatively thicker than previously measured temperature interfaces. Author

Subject Categories:

  • Fluidics and Fluerics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE