GRAPHICAL VISUALIZATION OF VORTICAL FLOWS BY MEANS OF HELICITY

被引:266
作者
LEVY, Y [1 ]
DEGANI, D [1 ]
SEGINER, A [1 ]
机构
[1] NASA, AMES RES CTR, FAC AERONAUT ENGN, MOFFETT FIELD, CA 94035 USA
关键词
D O I
10.2514/3.25224
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
Helicity density and normalized helicity are introduced as important tools for the graphical representation of three-dimensional flowfields that contain concentrated vortices. The use of these two quantities filters out the flowfield regions of low vorticity, as well as regions of high vorticity but low speed where the angle between the velocity and vorticity vectors is large (such as in the boundary layer). Their use permits the researcher to identify and accentuate the concentrated vortices, differentiate between primary and secondary vortices, and mark their separation and reattachment lines. The method also allows locating singular points in the flowfield and tracing the vortex-core streamlines that emanate from them. © 1990 American Institute of Aeronautics and Astronautics, Inc., All rights reserved.
引用
收藏
页码:1347 / 1352
页数:6
相关论文
共 18 条
[1]   IMPLICIT FACTORED SCHEME FOR COMPRESSIBLE NAVIER-STOKES EQUATIONS [J].
BEAM, RM ;
WARMING, RF .
AIAA JOURNAL, 1978, 16 (04) :393-402
[2]   IMPLICIT FINITE-DIFFERENCE ALGORITHM FOR HYPERBOLIC SYSTEMS IN CONSERVATION-LAW FORM [J].
BEAM, RM ;
WARMING, RF .
JOURNAL OF COMPUTATIONAL PHYSICS, 1976, 22 (01) :87-110
[3]  
BUNING PG, 1985, AIAA851507CP PAP
[4]  
CHAPMAN GT, 1986, AIAA860485 PAP
[5]   NUMERICAL ALGORITHM CONJUGATING STEADY AND TRANSIENT, SEPARATED, COMPRESSIBLE FLOW AND A SOLID BODY HAVING ARBITRARILY DISTRIBUTED HEAT-SOURCES [J].
DEGANI, D .
NUMERICAL HEAT TRANSFER, 1984, 7 (04) :395-411
[6]  
DEGANI D, 1987, AIAA872628 PAP
[7]  
FAUX ID, 1979, COMPUTATIONAL GEOMET, P100
[8]   ON GENERAL EVOLUTION CRITERION IN MACROSCOPIC PHYSICS [J].
GLANSDORFF, P ;
PRIGOGINE, I .
PHYSICA, 1964, 30 (02) :351-&
[9]   ON THE ROLE OF HELICAL STRUCTURES IN 3-DIMENSIONAL TURBULENT-FLOW [J].
LEVICH, E ;
TSINOBER, A .
PHYSICS LETTERS A, 1983, 93 (06) :293-297
[10]   ON A VARIATIONAL PROPERTY OF HELICITY IN INCOMPRESSIBLE FLOWS [J].
LEWALLE, J .
PHYSICS LETTERS A, 1987, 122 (6-7) :338-340