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 Flow in Scaveenging Processs for 2-Stroke Chapter 4 Marin ne Diesel Engin nes Figure 4.1: LDA Measurements along g X-axis (a) mean n radia al velocity profile (b) mean n tangential veloc city profil le (c) angle betwe een mean n radial and tange ential velocity. (a) (b) (c) 50 Swirling Flow in a Pipe
Experimental and Numerical Study of Swirling Flow in Scavenging Process for 2-Stroke Marine Diesel Engines Figure 4.2: LDA Measurements along an arc behind the blades (a) mean radial velocity profile (b) mean tangential velocity profile (Schnipper, 2010). Chapter 4 At downstream radial position of 180 mm, the relative variation in magnitudes of individual velocity components reduces significantly. A possible reason is that the flow at a radial position of 170 mm enters the contraction region which will have a damping effect to any variations/ fluctuations in velocity and the flow at nearby upstream positions also feels the presence of the contraction section. (m/s) V r (m/s) V (a) (b) The measurements conducted along the two arcs behind the blades as mentioned in figure 3.18 are shown in figure 4.2. Where is the angular location of the measurement point on a given arc. The negative values of the velocity components are due to the orientation of LDA laser beams. Each half length of the error bar is one standard deviation. The results show that at a radial distance of 230 mm (the trailing end of the blade is approximately at 51 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> Flow in Scaveenging<br />
Processs<br />
for 2-Stroke Chapter 4<br />
Marin ne Diesel Engin nes<br />
Figure<br />
4.1:<br />
LDA Measurements<br />
along g X-axis (a) mean n<br />
radia al velocity pr<strong>of</strong>ile (b)<br />
mean n tangential veloc city<br />
pr<strong>of</strong>il le (c) angle betwe een<br />
mean n radial <strong>and</strong><br />
tange ential velocity.<br />
(a)<br />
(b)<br />
(c)<br />
50<br />
<strong>Swirling</strong> Flow in a Pipe
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