导航

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2017, Vol. 38 ›› Issue (5): 120549-120549.doi: 10.7527/S1000-6893.2016.0302

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Mechanism test on aero acoustic characteristics of LAGOON landing gear wheel cavities

WANG Xiaoyuan, GUO Hao, XING Yu, LIU Peiqing   

  1. School of Aeronautic Science and Engineering, Beihang University, Beijing 100083, China
  • Received:2016-06-21 Revised:2016-11-18 Online:2017-05-15 Published:2016-12-21

Abstract:

Some studies on LAGOON (LAnding Gear nOise database for civil aviation authority validatiON) landing gear have found that noise of the wheel cavities is a kind of important noise source all over the world. To order to study its mechanism, we use a half scale LAGOON model as the test model and conduct the test in D5 wind tunnel of Beihang University. Some existing simulation results of LAGOON have shown that the tones in the noise spectra of LAGOON are related to the landing gear wheel cavities. On the basis of basic LAGOON test results, the test are conducted by covering the cavities. With comparing the results of different covering-modified test and existing results, we validate that the mechanism of generation of tones of cavity noise is related to the cavity resonance.

Key words: landing gear, aero acoustics, noise measurements, cavity noise, covering modification, mechanism of noise

CLC Number: