Experimental and Numerical Study of Swirling ... - Solid Mechanics

Experi imental and Numerical N Stud dy of Swirling g Flow in Scaveenging
Processs
for 2-Stroke
Marin ne Diesel Engin nes
Figure F 4.26: :
Normalized N Reynolds
Stress
Component t
@ z5 L3=4D
Chapter 4
The hig gh uv ´´ zones s weaken in inntensity
and mmove
further radially
outwarrd
resultin ng in region near n to cylindder
axis with low values (FFigure
4.26). In
general,
the overall spatial
distribuution
of uv ´ ´ is in the formm
of patches of
fluid re egions with high
values in the middle oof
them and mmoving
radiallly
outward d as the swirl decays d downsttream
and vorrtex
core size increases.
Figures 4.24-26, des scribes that iinitially
at z11
the Reynollds
shear streess
compon nent v v r is higher in thee
vortex core region. The peak values aare
observe ed at the radia al position at tthe
interface oof
forced vorttex
core and thhe
outer an nnular region.
In the annullar
region, thee
core has veryy
small values of
77
Swirling Flow in a Pipe