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
Fi igure 4.28:
No ormalized Reyno olds
Str ress Component
@ z3 L3=4D Chapter 4
At z3 in
figure 4.28 8, the maximum
absolute values of u u´´ w decreasees,
howeve er, in the near wall region itt
grows radiallly
inward towwards
the vortex
core an nd the concentrated
uw ´´ rregion
in the vortex core, spreads radiallly
outward d.
Further r downstream m at z5 in figuure
4.29, the overall magnnitude
of u´ w ´
decrease es and is an order o of 10 smmaller
than at z1. Comparinng
contour ploots
for ReA A and ReB in fi igure 4.28, u´ w ´ distributioon
at ReA has small gradiennts
in the flow f domain. In I other wordds,
the flow at ReB is more reesistant
towards
a uniform
spatial distribution
of u u´´ w in the fllow
domain. AAnother
featuure
79
Swirling Flow in a Pipe