Volume 34 Issue 3
Mar.  2019
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Duct sound propagation prediction based on grazing flow duct test[J]. Journal of Aerospace Power, 2019, 34(3): 678-684. doi: 10.13224/j.cnki.jasp.2019.03.020
Citation: Duct sound propagation prediction based on grazing flow duct test[J]. Journal of Aerospace Power, 2019, 34(3): 678-684. doi: 10.13224/j.cnki.jasp.2019.03.020

Duct sound propagation prediction based on grazing flow duct test

doi: 10.13224/j.cnki.jasp.2019.03.020
  • Received Date: 2018-08-27
  • Publish Date: 2019-03-28
  • Acoustic complex pressure distribution on the duct wall opposite to the acoustic liner sample was obtained from grazing flow duct test with and without flow. Based on the test model and data, sound prediction study was carried out to validate the 2D and 3D duct sound propagation models. Result showed that 2D and 3D prediction results were very consistent, especially in the absence of flow. Duct sound propagation predictions were well matched to the corresponding grazing flow test results with and without flow at different frequencies, which verified the sound propagation model accuracy. Considering the influence of flow and frequency, the error between prediction and test results with flow was bigger than the situation without flow, and error at low frequency was bigger than that at high frequency.

     

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