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Investigation of nonreflective boundary conditions for computational aeroacoustics

Caraeni, Mirela LU and Fuchs, Laszlo LU (2006) In AIAA Journal 44(9). p.1932-1940
Abstract
Direct aeroacoustic computations require nonreflective boundary conditions that allow disturbances to leave the domain freely without anomalous reflections. In the present paper we analyze a series of nonreflective boundary conditions already published in the literature and propose an improved outflow nonreflective boundary condition with reflection characteristic that is reduced greatly. For the solution of the linearized Euler equations, a sixth-order compact finite-difference algorithm is used together with a sixth-order explicit digital filter that suppresses the high-frequency spurious oscillations in the solution. A number of representative test cases are presented. The new outflow boundary condition is recommended for the simulation... (More)
Direct aeroacoustic computations require nonreflective boundary conditions that allow disturbances to leave the domain freely without anomalous reflections. In the present paper we analyze a series of nonreflective boundary conditions already published in the literature and propose an improved outflow nonreflective boundary condition with reflection characteristic that is reduced greatly. For the solution of the linearized Euler equations, a sixth-order compact finite-difference algorithm is used together with a sixth-order explicit digital filter that suppresses the high-frequency spurious oscillations in the solution. A number of representative test cases are presented. The new outflow boundary condition is recommended for the simulation of sound produced by turbulence. (Less)
Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
AIAA Journal
volume
44
issue
9
pages
1932 - 1940
publisher
American Institute of Aeronautics and Astronautics
external identifiers
  • wos:000240413100002
  • scopus:33749250236
ISSN
1533-385X
DOI
10.2514/1.5807
language
English
LU publication?
yes
id
dea1e095-a3a7-4ff6-865e-2031e7353551 (old id 394299)
date added to LUP
2016-04-01 12:03:34
date last changed
2021-02-17 06:37:33
@article{dea1e095-a3a7-4ff6-865e-2031e7353551,
  abstract     = {Direct aeroacoustic computations require nonreflective boundary conditions that allow disturbances to leave the domain freely without anomalous reflections. In the present paper we analyze a series of nonreflective boundary conditions already published in the literature and propose an improved outflow nonreflective boundary condition with reflection characteristic that is reduced greatly. For the solution of the linearized Euler equations, a sixth-order compact finite-difference algorithm is used together with a sixth-order explicit digital filter that suppresses the high-frequency spurious oscillations in the solution. A number of representative test cases are presented. The new outflow boundary condition is recommended for the simulation of sound produced by turbulence.},
  author       = {Caraeni, Mirela and Fuchs, Laszlo},
  issn         = {1533-385X},
  language     = {eng},
  number       = {9},
  pages        = {1932--1940},
  publisher    = {American Institute of Aeronautics and Astronautics},
  series       = {AIAA Journal},
  title        = {Investigation of nonreflective boundary conditions for computational aeroacoustics},
  url          = {http://dx.doi.org/10.2514/1.5807},
  doi          = {10.2514/1.5807},
  volume       = {44},
  year         = {2006},
}