Accession Number:

ADA200467

Title:

Near Field Turbulent Wake Predictions

Descriptive Note:

Memorandum rept.

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

Report Date:

1988-11-08

Pagination or Media Count:

31.0

Abstract:

Experimental measurements of the near-field turbulent wake of a model of a self-propelled body have shown several surprising features. Numerical models using the parabolic form of the Navier-Stokes equations have some limitation when used to model this data. Two different versions of the partially parabolic form of the equations available in the literature are examined and weaknesses for the problem of the wake of a self-propelled body are discussed. A variant is proposed which accounts for the complex initial pressure field which is integral to the down-stream prediction of these wakes. it also deals with the problems connected with using incomplete experimental data as initial conditions for this type of calculation. Comparisons are made with experimental measurements of the self-propelled model with a simulated free surface. These comparisons illustrate the features of this model.

Subject Categories:

  • Theoretical Mathematics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE