Accession Number:

AD0737996

Title:

Dissipation of an Axially Symmetric Turbulent Wake in the Very Far Field,

Descriptive Note:

Corporate Author:

NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s):

Report Date:

1971-12-27

Pagination or Media Count:

16.0

Abstract:

A wake visualization technique has been used to observe turbulent wake at distances of 1000000 diameters behind an axially symmetric streamlined body traveling submerged in water. It has been found that a reverse transition occurs in the rate of wake growth between 10000 and 1000000 diameters, which is attributed to a reverse transition from turbulent to laminar flow. The wake visualization technique involves dropping a dye-coated body down a taut, vertical guide wire into a large water-filled tank. Measurement of the wake growth and dissipation is made from a time series of photographs. The bodies tested were 6 x 1 prolate spheroids of two sizes. Body density was varied to change velocities.

Subject Categories:

  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE