THESE de DOCTORAT - cerfacs
THESE de DOCTORAT - cerfacs
THESE de DOCTORAT - cerfacs
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86 Chapter 5: Assessment of combustion noise in a premixed swirled combustor<br />
Pressure Fluctuation (Pa)<br />
M5 M6 M7<br />
40<br />
Premixer<br />
Combustion chamber<br />
20<br />
0<br />
−20<br />
−40<br />
−0.2 −0.1 0 0.1 0.2<br />
x (m)<br />
0.3 0.4 0.5<br />
(a) Pressure Wave from Eq. (2.63)<br />
Hybrid Computation<br />
Pressure Fluctuation (Pa)<br />
M5 M6 M7<br />
40<br />
Premixer<br />
Combustion chamber<br />
20<br />
0<br />
−20<br />
−40<br />
−0.2 −0.1 0 0.1 0.2<br />
x (m)<br />
0.3 0.4 0.5<br />
(b) Pressure fluctuation from LES<br />
Direct Computation<br />
Figure 5.17: Longitudinal pressure Waves oscillating at 954 Hz<br />
Pressure Fluctuation (Pa)<br />
M5 M6 M7<br />
40<br />
Premixer<br />
Combustion chamber<br />
20<br />
0<br />
−20<br />
−40<br />
−0.2 −0.1 0 0.1 0.2<br />
x (m)<br />
0.3 0.4 0.5<br />
(a) Pressure Wave from Eq. (2.63)<br />
Hybrid Computation<br />
Pressure Fluctuation (Pa)<br />
M5 M6 M7<br />
40<br />
Premixer<br />
Combustion chamber<br />
20<br />
0<br />
−20<br />
−40<br />
−0.2 −0.1 0 0.1 0.2<br />
x (m)<br />
0.3 0.4 0.5<br />
(b) Pressure fluctuation from LES<br />
Direct Computation<br />
Figure 5.18: Longitudinal pressure Waves oscillating at 1658 Hz
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