Accession Number : ADA258471


Title :   An Experimental Investigation of Interacting Wing-Tip Vortex Pairs


Descriptive Note : Technical rept. 1 Oct 1990-30 Jun 1992


Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF AEROSPACE AND OCEAN ENGINEERING


Personal Author(s) : Zsoldos, J S ; Devenport, W J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a258471.pdf


Report Date : 30 Jun 1992


Pagination or Media Count : 432


Abstract : The interaction of trailing vortex pairs shed from the tips of two rectangular wings have been studies through helium bubble flow visualizations and extensive hot wire velocity measurements made between 10 and 30 chordlengths downstream. The wings were placed tip to tip at equal and opposite angles of attack, generating pairs of co-rotating and counter rotating vortices. Meaningful hot wire measurements could be made because the vortices were found to be insensitive to probe interference and experienced very small wandering motions. The co-rotating pairs were observed to rotate around each other and merge. Upstream of the merging location, the vortices have approximately elliptical cores. These are surrounded by the two wing wakes which join together around the two cores. Trailing vortices, Vortex interaction, Turbulence.


Descriptors :   *TRAILING VORTICES , *FLOW VISUALIZATION , *FLUID DYNAMICS , *WING TIPS , VELOCITY , MEASUREMENT , HOT WIRE , PROBES , INTERACTIONS , TURBULENCE , ANGLE OF ATTACK


Subject Categories : Test Facilities, Equipment and Methods
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE