Volume 37 Issue 3
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LI Jiamin, CHEN Guoyong, YANG Xiaoquan, TANG Xiaolong, DING Jue, WENG Peifen. Numerical simulation of typical cavity noise of airplane boarding gate seam[J]. Journal of Aerospace Power, 2022, 37(3): 649-663. doi: 10.13224/j.cnki.jasp.20210584
Citation: LI Jiamin, CHEN Guoyong, YANG Xiaoquan, TANG Xiaolong, DING Jue, WENG Peifen. Numerical simulation of typical cavity noise of airplane boarding gate seam[J]. Journal of Aerospace Power, 2022, 37(3): 649-663. doi: 10.13224/j.cnki.jasp.20210584
shu

Numerical simulation of typical cavity noise of airplane boarding gate seam

doi: 10.13224/j.cnki.jasp.20210584
  • 1.

    Shanghai Institute of Applied Mathematics and Mechanics， Shanghai University，Shanghai 200072，China

  • 2.

    Shanghai Key Laboratory of Energy Engineering Mechanics， Shanghai University，Shanghai 200072，China

  • Received Date: 2021-10-14
  • Publish Date: 2022-03-28
    Abstract
  • In order to study the strong howling problem caused by the modification of the boarding gate of an air-plane in flight，a two-dimensional irregular cavity model was established according to the actual flow characteristics by combining the flow characteristics of the fuselage surface and the actual configuration of the boarding gate seam cavity.The flow and noise characteristics of two types of boarding gate seam cavities with shoulder wall were numerically simulated by using the hybrid method of detached-eddy simulation and Ffowcs Williams-Hawkings integral equation，and the generation mechanism of pure tone noise at the boarding gate seam was analyzed.The results show that for the seam cavity with single shoulder wall，the increase of the length-depth ratio makes the interaction between vortices in the cavity intensify，and the pressure pulsation in the cavity becomes more intense，as well the total sound pressure level in the far-field increases by 3~10 dB on average，which indicates that the length-depth ratio of the cavity has obvious influence on the noise level.The irregular two-dimensional cavity model of an air-plane gate seam established accords with the physical reality，and the pure tone frequency by numerical calculation basically falls within the pure tone frequency range obtained by flight test，which can reflect the main physical characteristics of the airplane boarding gate howling noise.

     

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