NACA-RM-A50L12

Preliminary investigation of the delay of turbulent flow separation by means of wedge-shaped bodies

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T17:58:28Z
date available	2017-09-04T17:58:28Z
date copyright	01/01/1951
date issued	1951
identifier other	FRONEEAAAAAAAAAA.pdf
identifier uri	http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/181554
description abstract	An experimental investigation of pyramidal, wedge-like bodies devices for delaying separation of a turbulent boundary layer was undertaken. Tests of individual wedges on a large flat plate showed that, within certain limits, effective boundary-layer control could be obtained with wedges of different geometry, but that the drag of the wedges was high, making it desirable to keep the size of the wedges to a minimum. Tests of multiple small wedges attached to a two-dimensional NACA 633-018 airfoil model showed that greater maximum lift was attained by placing the wedges well forward along the chord, and by allowing open spaces between adjacent wedges. The best arrangement found increased the maximum lift of the airfoil about 45 percent at the expense of doubling the zero-lift drag. Similar gains were achieved by the use of small, vane-type vortex generators at about half the cost in drag.
language	English
title	NACA-RM-A50L12	num
title	Preliminary investigation of the delay of turbulent flow separation by means of wedge-shaped bodies	en
type	standard
page	31
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1951
contenttype	fulltext