Accession Number : AD0711032

Title :   VORTEX FLOW FIELD STUDY.

Descriptive Note : Final rept. Jan 68-Sep 69,

Corporate Author : SINGER-GENERAL PRECISION INC LITTLE FALLS N J KEARFOTT DIV

Personal Author(s) : DeSantis,Michael J. ; Rakowsky,Edward L.

Report Date : MAY 1970

Pagination or Media Count : 116

Abstract : An experimental investigation of the flow field in the pancake region of a three-dimensional axisymmetric vortex rate sensor was conducted. Basically the device consists of two coaxial cylindrical surfaces with outlet tubes located on the axis of symmetry perpendicular to the surfaces. Radial inflow of the fluid develops into a sink flow with a vortex generated by an angular rate input through fluid coupling at the periphery of the device. Detailed descriptions of radial and circumferential velocity profiles over a specific range of operating parameters are presented. Hot wire anemometry techniques were utilized to measure the velocity profiles. Experimental results indicate that for gap distances between the coaxial plates greater than 0.25 inches and an inlet radius of 11 inches, the vortex flow throughout is essentially inviscid with boundary layer development along the walls. For gap distances of 0.1 inches or less, fully developed flow occurs near the inlet of the pancake region for pure radial flow. The velocity profiles exhibit a parabolic distribution for pure-radial flow. (Author)

Descriptors :   (*VORTICES, *FLUIDICS), FLOWMETERS, VELOCITY, DETECTORS, FLOW FIELDS, THREE DIMENSIONAL FLOW, AXIALLY SYMMETRIC FLOW, BOUNDARY LAYER

Subject Categories : Fluidics and Fluerics

Distribution Statement : APPROVED FOR PUBLIC RELEASE