DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click
HERE to register or log in.
Accession Number:
AD0610096
Title:
MIXING AND FLUCTUATIONS IN A TURBULENT WAKE
Corporate Author:
HELIODYNE CORP LOS ANGELES CA
Report Date:
1964-12-01
Abstract:
The structure of turbulent wakes of hypersonic bodies is argued to be largely controlled by the combined action of relatively large scale random convective motions, which introduce inhomogeneities in the wake core, and of molecular diffusion aided by turbulent distortions of fluid elements. A previously developed mathematical model representing turbulent wake mixing in terms of a mixing lag is discussed and qualitatively justified in terms of the above described mixing mechanism, and somewhat generalized. Numerical predictions for the magnitude and variation of mass density fluctuations in a relatively low speed wake are obtained by solving a simplified set of equations, in which the lag is represented by an effective mixing boundary, and are in encouraging agreement with the general magnitude and trend observed experimentally, although firm experimental measurements are lacking to-date.
Descriptive Note:
Research rept.
Supplementary Note:
Rept. on Proj. Defender. Sponsored in part by the DARPA. DOI: 10.21236/AD0610096
Pages:
0042
Distribution Statement:
Approved for public release; distribution is unlimited.
Contract Number:
DA-04-495-AMC-458(Z)
File Size:
2.13MB
