406
P. Liu
Fig. 6.24 D5 aeroacoustic wind tunnel landing gear noise test
Fig. 6.25 D5 pneumatic microphone sensor for pneumatic noise measurement
has been reformed and updated many times, and the automatic computer
control has been realized in the aspects of measurement, control, data
acquisition, and processing. The measurement and control system consists
of four parts: test management and database system, measurement system,
pressure control system, and motion control system. In 2010, the wind
tunnel power system was upgraded and replaced by the dc motor which
had already been in service for a long time. The FL-12 wind tunnel is
mainly composed of the test section, the first diffusion section, the first
corner, the second corner, the fan section, the second diffusion section,
the third corner, the fourth corner, the stability section, and the contraction section. The size of the test section is 4 m × 3 m × 8 m (width
P. Liu
Fig. 6.24 D5 aeroacoustic wind tunnel landing gear noise test
Fig. 6.25 D5 pneumatic microphone sensor for pneumatic noise measurement
has been reformed and updated many times, and the automatic computer
control has been realized in the aspects of measurement, control, data
acquisition, and processing. The measurement and control system consists
of four parts: test management and database system, measurement system,
pressure control system, and motion control system. In 2010, the wind
tunnel power system was upgraded and replaced by the dc motor which
had already been in service for a long time. The FL-12 wind tunnel is
mainly composed of the test section, the first diffusion section, the first
corner, the second corner, the fan section, the second diffusion section,
the third corner, the fourth corner, the stability section, and the contraction section. The size of the test section is 4 m × 3 m × 8 m (width