Experimental and Numerical Study of Swirling ... - Solid Mechanics
Experimental and Numerical Study of Swirling ... - Solid Mechanics 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 4.11: Me ean Normalized Axial A Vo orticity @ z1 L3=4D. L Chapter 4 With th he swirl deca ay the vortex core has losst its vorticityy and seems to transfer r Vorticity in n outward raddial directions. The size oof the core hhas increase ed and the re egion with loow vorticity iis observed att smaller radiial distance e. 60 Swirling Flow in a Pipe
Experi imental and Numerical N Stud dy of Swirling g Flow in Scaveenging Processs for 2-Stroke Marin ne Diesel Engin nes Figure F 4.12: Mean M Normalized d Axial Vorticity V @ z3 3 L3=4D. L Chapter 4 It shou uld be noted that t as in casse of vortex mmodels (Burgeers Vortex), thhe vortical l forced vortex core is surrrounded by aan irrotationall/potential floow region. However, the e experimentall results seem to be differennt in a confineed swirling g flow having profiles simmilar to the Burgers vortex model. Thhe possible e reason is th hat outside thhe vortex corre region, thee vortex decaays radially y outward (Figure 4.11). The vortical fluid patchees at the outter bounda ary of forced vortex v region interact and exchanges voorticity with thhe neighbo ouring non-vo ortical fluid paatches. As a result, a region with a very loow vorticity y is formed in i the regionn where the vvortex core annd the annullar region meet. m 61 Swirling Flow in a Pipe
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Experi imental <strong>and</strong> <strong>Numerical</strong> N Stud dy <strong>of</strong> <strong>Swirling</strong> g Flow in Scaveenging<br />
Processs<br />
for 2-Stroke<br />
Marin ne Diesel Engin nes<br />
Fi igure 4.11:<br />
Me ean Normalized Axial A<br />
Vo orticity @ z1 L3=4D. L<br />
Chapter 4<br />
With th he swirl deca ay the vortex core has losst<br />
its vorticityy<br />
<strong>and</strong> seems to<br />
transfer r Vorticity in n outward raddial<br />
directions.<br />
The size o<strong>of</strong><br />
the core hhas<br />
increase ed <strong>and</strong> the re egion with loow<br />
vorticity iis<br />
observed att<br />
smaller radiial<br />
distance e.<br />
60<br />
<strong>Swirling</strong> Flow in a Pipe
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