404
P. Liu
Fig. 6.20 D5 wind tunnel noise reduction processing
in the test section of the wind tunnel was measured and compared with the
total sound pressure level of other acoustic wind tunnels abroad. Through
analysis, it can be obtained that: in the case of no wind, the sound pressure
level in the silencer room is 23.7 dB; at 80 m/s, the total sound pressure
level in the muffling room is 87 dBA, and the sound pressure level corresponding to 8000 Hz is 67.7 dBA, which meet the design requirements
(as shown in Fig. 6.21). At the same time, the acoustic characteristics of
the D5 wind tunnel reach the background noise level of the acoustic wind
tunnel of Hyundai motor in Korea, and the aeroacoustic test of the parts
Fig. 6.21 Frequency spectrum of 1/3 octave of background noise at different wind
speeds in D5 wind tunnel
P. Liu
Fig. 6.20 D5 wind tunnel noise reduction processing
in the test section of the wind tunnel was measured and compared with the
total sound pressure level of other acoustic wind tunnels abroad. Through
analysis, it can be obtained that: in the case of no wind, the sound pressure
level in the silencer room is 23.7 dB; at 80 m/s, the total sound pressure
level in the muffling room is 87 dBA, and the sound pressure level corresponding to 8000 Hz is 67.7 dBA, which meet the design requirements
(as shown in Fig. 6.21). At the same time, the acoustic characteristics of
the D5 wind tunnel reach the background noise level of the acoustic wind
tunnel of Hyundai motor in Korea, and the aeroacoustic test of the parts
Fig. 6.21 Frequency spectrum of 1/3 octave of background noise at different wind
speeds in D5 wind tunnel