Accession Number : AD0433052


Title :   AN EXPERIMENTAL STUDY OF SECONDARY FLOW IN JETDRIVEN VORTEX CHAMBERS


Corporate Author : AEROSPACE CORP EL SEGUNDO CA


Personal Author(s) : Ross, D H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/433052.pdf


Report Date : 27 Jan 1964


Pagination or Media Count : 58


Abstract : The characteristics of vortex flows in enclosed chambers are strongly influenced by the existence of three-dimensional secondary flows in the endwall boundary layers and in a region near the axis. Classical 'line-vortex' or two- dimensional treatments fail to account for these effects and no theoretical treatment to date has been able to account for all of the complicated interactions. A series of flow visualization experiments was conducted to obtain a qualitative picture of the flow and the effects of changes in geometry and flow parameters. A transparent vortex chamber and selective dye injection into the water-working fluid were utilized. Interest centered on changes in the surface and shape of the end walls and on the exit hole. A form of endwall- boundary-layer slot blowing was effective in altering the secondary flow pattern. An approximate analysis is made to determine the effect of non-planar end-walls on boundary layer radial mass flow, based on the G. I. Taylor result for a conical swirl flow.


Descriptors :   *SECONDARY FLOW , *THREE DIMENSIONAL FLOW , *VORTICES , AXISYMMETRIC FLOW , BOUNDARY LAYER , CENTRIFUGAL FIELDS , DYES , FLOW VISUALIZATION , FLUID FLOW , HIGH SPEED PHOTOGRAPHY , INFECTIOUS DISEASES , VISCOSITY , WATER


Subject Categories : Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE