THESE de DOCTORAT - cerfacs
THESE de DOCTORAT - cerfacs
THESE de DOCTORAT - cerfacs
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80 Chapter 5: Assessment of combustion noise in a premixed swirled combustor<br />
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x = 7 mm<br />
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(a) RMS Axial Velocity (m/s)<br />
(b) RMS Radial Velocity (m/s)<br />
Figure 5.6: Velocity Profiles: ◦ Experimental PIV measurements<br />
– – – LES 3 million cells, —— LES 10 million cells<br />
7 x 104 Time (s)<br />
6<br />
3 million Cells<br />
10 million Cells<br />
∫<br />
˙qdV<br />
˙Q =<br />
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0 0.005 0.01 0.015 0.02 0.025 0.03 0.035 0.04 0.045 0.05<br />
a) Heat release integrated over the entire volume (W)<br />
1 x 108 Time (s)<br />
∫<br />
(d ˙q/dt) dV<br />
V<br />
0.5<br />
0<br />
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3 million Cells<br />
10 million Cells<br />
−1<br />
0 0.005 0.01 0.015 0.02 0.025 0.03 0.035 0.04 0.045 0.05<br />
b) Rate of change of heat release integrated over the entire volume (W/s)<br />
Figure 5.7: Heat Release and rate of change of heat release