The Noise of a Forward Swept Fan - CAFE Foundation

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150140130120110100908010 100 1,000 10,000 100,000Figure 13.—One third octave total sound power level.1401301201101009080700 1000 2000 3000 4000 5000 6000 7000 8000Figure 14.—Total sound power level at 913 ft/sec tip speed.NASA/TM—2003-21220822
14013012011010090807060(a)500 1000 2000 3000 4000 5000 6000 7000 80001601401201008060(b)40 0 1000 2000 3000 4000 5000 6000 7000 80001601401201008060(c)400 1000 2000 3000 4000 5000 6000 7000 8000Figure 15.—Extraneous tones. (a) 1037 ft/sec tip speed.(b) 1063 ft/sec tip speed. (c) 1152 ft/sec tip speed.NASA/TM—2003-21220823
Page 1 and 2: NASA/TM—2003-212208The Noise of a
Page 3 and 4: NASA/TM—2003-212208The Noise of a
Page 5 and 6: The Noise Reduction of a Forward Sw
Page 7 and 8: Aerodynamic OperationThe drive rig
Page 9 and 10: significant at all of the scale fac
Page 11 and 12: Data with Acoustic Barrier Wall.—
Page 13 and 14: Table I.—Fan design parameters at
Page 15 and 16: (a)C-2001-177(b)Figure 1.—Baselin
Page 17 and 18: (a)(b)Figure 3.—Tunnel configurat
Page 19 and 20: Figure 5.—Fan stage operating lin
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The Noise of a Forward Swept Fan - CAFE Foundation

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