NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
On the combination of kinematics with flow visualization to compute total circulation - Application to vortex rings in a tubeTo date the computation of the total circulation, or strength of a vortex has required detailed measurements of the velocity field within the vortex. In this paper a method is described in which the kinematics of the vortical flow field is exploited to calculate the strength of a vortex from relatively simple flow visualization measurements. There are several advantages in the technique, the most important being the newly acquired ability to calculate the transient changes in strength of a single vortex as it evolves. The method is applied to the study of vortex rings, although the development can be carried over directly to study vortex pairs, and it is expected that it can be generalized to other flows which contain regions of concentrated vorticity. The accuracy of the method as applied to vortex rings, assessed in part by comparing with the laser Doppler velocimeter (LDV) measurements of Sullivan et al., is shown to be excellent.
Document ID
19800057393
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Brasseur, J. G.
(NASA Ames Research Center Moffett Field, Calif., United States)
Chang, I.-D.
(Stanford University Stanford, Calif., United States)
Date Acquired
August 10, 2013
Publication Date
July 1, 1980
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
AIAA PAPER 80-1330
Meeting Information
Meeting: Fluid and Plasma Dynamics Conference
Location: Snowmass, CO
Start Date: July 14, 1980
End Date: July 16, 1980
Sponsors: American Institute of Aeronautics and Astronautics
Accession Number
80A41563
Funding Number(s)
CONTRACT_GRANT: NSF ENG-74-22615
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available