NACA-TN-2913

On the development of turbulent wakes from vortex streets

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T15:20:11Z
date available	2017-09-04T15:20:11Z
date copyright	01/01/1953
date issued	1953
identifier other	MVONEEAAAAAAAAAA.pdf
identifier uri	https://yse.yabesh.ir/std/handle/yse/20055
description abstract	Wake development behind circular cylinders at Reynolds numbers from 40 to 10,000 was investigated in a low-speed wind tunnel. Standard hot-wire techniques were used to study the velocity fluctuations. The Reynolds number range of periodic vortex shedding is divided into two distinct subranges. At R = 40 to 150, called the stable range, regular vortex streets are formed and no turbulent motion is developed. The range R = 150 to 300 is a transition range to a regime called the irregular range, in which turbulent velocity fluctuations accompany the peiodic formation of vortices. The turbulence is initiated by laminarturbulent transition in the free layers which spring from the separation points on the cylinder. This transition first occurs in the range R = 150 to 300.
language	English
title	NACA-TN-2913	num
title	On the development of turbulent wakes from vortex streets	en
type	standard
page	80
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1953
contenttype	fulltext