Volume 31 Issue 12
Dec.  2016
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LI Jia, GAO Jun. Influence of curvature on flow stability in circular pipe[J]. Journal of Aerospace Power, 2016, 31(12): 2817-2823. doi: 10.13224/j.cnki.jasp.2016.12.001
Citation: LI Jia, GAO Jun. Influence of curvature on flow stability in circular pipe[J]. Journal of Aerospace Power, 2016, 31(12): 2817-2823. doi: 10.13224/j.cnki.jasp.2016.12.001

Influence of curvature on flow stability in circular pipe

doi: 10.13224/j.cnki.jasp.2016.12.001
  • Received Date: 2016-07-25
  • Publish Date: 2016-12-28
  • In order to research the influence of curvature on flow stability in circular pipe, two circular pipe models of axial flow of spanwise curvature and circumferential flow of axial curvature were studied. For two models, the stabilities and disturbance evolutions of difference curvatures were calculated by the linear stability theory. And the results were compared with channel flow. Then the influences of curvature on basic flow, eigenvalue and eigenfunction were obtained. Result showed that, along with the greater curvature, the basic flow would deflect inside, the axial wavenumber of disturbance wave became greater, the growth rate changed smaller, the unstable region of neutral curve diminished and symmetry of eigenfunction got worse. So curvature has a stabilizing influence on disturbances in boundary layers and the stability will be better when the curvature increases gradually in certain rang.

     

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