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 4.8:
Averaged
3D Veloc city
Fi ield at z5 L=4D (Color
Contour
represent the out
of f the plane velocity
co omponent Vz).
4.2.2
Tangentia al Velocityy
Profile
Chapter 4
The tangential
velocit ty V profiles iin
figure 4.9 ggive
an overvieew
of tangentiial
velocity distribution at a all measurinng
planes and also provide a comparison at
ReA and d ReB. The pro ofiles ( V and V ) are preseented
along X-axis
and at Y= =0
z
but by first shifting g the origin of the coorddinate
system from cylinder
geometr ric center to th he mean centeer
of the vorteex
core i.e. aloong
a horizonttal
line thr rough the vo ortex center. A simple alggorithm
is useed
to find thhe
approxim mate average position of tthe
vortex cennter.
The algoorithm
makes a
cubic in nterpolation between b differrent
points inn
the PIV measurement
griid
57
Swirling Flow in a Pipe