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A numerical study on fluid flow and acoustic characteristics of a supersonic impinging jet using vorticity confinement

Sadri, M ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.3813/AAA.919369
  3. Publisher: S. Hirzel Verlag GmbH , 2019
  4. Abstract:
  5. The objective of this work is to numerically study the fluid flow and acoustic field of a supersonic impinging jet by applying the vorticity confinement (VC) method. For this aim, the three-dimensional compressible Navier-Stokes equations with the incorporation of the VC method are considered and the resulting system of equations is solved by using the sixth-order compact finite-difference scheme. To eliminate the numerical instability, a low-pass high-order filter is used. The nonreflective boundary conditions are applied for all the free boundaries and the radiated sound field is obtained by the Kirchhoff surface integration. Comparisons of the present results with the experimental data and other numerical simulations show that the solution methodology adopted based on the application of the VC method with the high-order compact finite-difference scheme provides a good prediction of the fluid flow and the acoustic field of the impingement region on coarser grids than that usually required in the LESs, and thus, the calculations of coarse grid LESs are improved. © S. Hirzel Verlag · EAA
  6. Keywords:
  7. Acoustic fields ; Finite difference method ; Incompressible flow ; Numerical methods ; Supersonic aerodynamics ; Vorticity ; Acoustic characteristic ; Compact finite difference schemes ; Compressible Navier-Stokes equations ; High-order compact finite difference schemes ; Numerical instability ; Radiated sound fields ; Supersonic impinging jets ; Vorticity confinement ; Navier Stokes equations
  8. Source: Acta Acustica united with Acustica ; Volume 105, Issue 6 , 2019 , Pages 1127-1136 ; 16101928 (ISSN)
  9. URL: https://www.ingentaconnect.com/content/dav/aaua/2019/00000105/00000006/art00024