Validation of a CAA Code for a Case of Vortical Gust-Stator Interaction

Validation of a CAA Code for a Case of Vortical Gust-Stator Interaction

Bibliographic Details
Main Author: Durand, Christopher
Language:English
Published: University of Toledo / OhioLINK 2016
Subjects:
Aerospace Engineering
Mechanical Engineering
Acoustics
CAA
computational aeroacoustics
gust-cascade
vortical gust
drp
absorbing boundary layer
stator
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=toledo1481203960382465
id ndltd-OhioLink-oai-etd.ohiolink.edu-toledo1481203960382465
record_format oai_dc
spelling ndltd-OhioLink-oai-etd.ohiolink.edu-toledo14812039603824652021-08-03T06:39:23Z Validation of a CAA Code for a Case of Vortical Gust-Stator Interaction Durand, Christopher Aerospace Engineering Mechanical Engineering Acoustics CAA computational aeroacoustics gust-cascade vortical gust drp absorbing boundary layer stator In this work, the solution of the NASA Glenn Research Center Broadband Aeroacoustic Stator Simulation (BASS) Computational Aeroacoustics (CAA) code to a benchmark problem has been presented. The test case used for this work is the Category 3 problem from the NASA Second CAA Workshop on Benchmark Problems, which is a 2D gust--cascade problem involving the interaction of an incident vortical gust with a row of infinitely thin stator blades. It has been found that BASS accurately predicts the magnitude of the cut-on acoustic modes that result from the gust impinging on the blades for both the low frequency and the high frequency benchmark case. Spurious reflections from the upstream and downstream boundaries are present in the solution due to limitations of the boundary conditions. Absorbing layers were used to minimize reflections from the boundary, with favorable results achieved by both using absorbing layers and increasing the axial length of the computational domain. Results also have been presented that suggest that dispersion-relation-preserving (DRP) spatial differencing schemes may not accurately resolve the decay rate of decaying acoustic waves with an economical number of grid points per wavelength. This work does not suggest a solution to this issue, but provides a general overview of the problem in order to help form a basis for future research. 2016 English text University of Toledo / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=toledo1481203960382465 http://rave.ohiolink.edu/etdc/view?acc_num=toledo1481203960382465 unrestricted This thesis or dissertation is protected by copyright: some rights reserved. It is licensed for use under a Creative Commons license. Specific terms and permissions are available from this document's record in the OhioLINK ETD Center.
collection NDLTD
language English
sources NDLTD
topic Aerospace Engineering
Mechanical Engineering
Acoustics
CAA
computational aeroacoustics
gust-cascade
vortical gust
drp
absorbing boundary layer
stator
spellingShingle Aerospace Engineering
Mechanical Engineering
Acoustics
CAA
computational aeroacoustics
gust-cascade
vortical gust
drp
absorbing boundary layer
stator
Durand, Christopher
Validation of a CAA Code for a Case of Vortical Gust-Stator Interaction
author Durand, Christopher
author_facet Durand, Christopher
author_sort Durand, Christopher
title Validation of a CAA Code for a Case of Vortical Gust-Stator Interaction
title_short Validation of a CAA Code for a Case of Vortical Gust-Stator Interaction
title_full Validation of a CAA Code for a Case of Vortical Gust-Stator Interaction
title_fullStr Validation of a CAA Code for a Case of Vortical Gust-Stator Interaction
title_full_unstemmed Validation of a CAA Code for a Case of Vortical Gust-Stator Interaction
title_sort validation of a caa code for a case of vortical gust-stator interaction
publisher University of Toledo / OhioLINK
publishDate 2016
url http://rave.ohiolink.edu/etdc/view?acc_num=toledo1481203960382465
work_keys_str_mv AT durandchristopher validationofacaacodeforacaseofvorticalguststatorinteraction
_version_ 1719441143169548288

Similar Items