Aerodynamics and Acoustics of Modern Engine Test Cells ...
Aerodynamics and Acoustics of Modern Engine Test Cells ...
Aerodynamics and Acoustics of Modern Engine Test Cells ...
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Insertion Loss (dB)<br />
Sample <strong>of</strong> Acoustic Calculation<br />
Flow Chart for Exhaust Treatment<br />
dB (10^-12 W)<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
32<br />
32<br />
150<br />
140<br />
130<br />
63<br />
125<br />
250<br />
500<br />
POWER LEVEL IN EXHAUST PLENUM<br />
120<br />
10 100 1000 10000<br />
frequency (Hz)<br />
1000<br />
frequency (Hz)<br />
2000<br />
4000<br />
8000<br />
Reverberation<br />
wall transmission<br />
Aerospace <strong>Test</strong>ing Expo 2005 STAND 2/B30<br />
Stack Directivity<br />
horizontal directivity<br />
Divergence<br />
Absorption<br />
A-weight<br />
"Excellence in <strong>Test</strong> Facilities"
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