Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6029
Title: One-step direct aeroacoustic simulation using space-time conservation element and solution element method
Authors: Ho, CY
Leung, RCK 
Zhou, K
Lam, GCY
Jiang, Z
Keywords: Aeroacoustics
CAA
CE/SE method
Acoustic wave
Supersonic jet
Issue Date: 2011
Publisher: American Institute of Physics
Source: AIP Conference proceedings, 2011, v. 1376, p. 218-220 How to cite?
Abstract: One‐step direct aeroacoustic simulation (DAS) has received attention from aerospace and mechanical high‐pressure fluid‐moving system manufacturers for quite some time. They aim to simulate the unsteady flow and acoustic field in the duct simultaneously in order to investigate the aeroacoustic generation mechanisms. Because of the large length and energy scale disparities between the acoustic far field and the aerodynamic near field, highly accurate and high‐resolution simulation scheme is required. This involves the use of high order compact finite difference and time advancement schemes in simulation. However, in this situation, large buffer zones are always needed to suppress the spurious numerical waves emanating from computational boundaries. This further increases the computational resources to yield accurate results. On the other hand, for such problem as supersonic jet noise, the numerical scheme should be able to resolve both strong shock waves and weak acoustic waves simultaneously. Usually numerical aeroa‐coustic scheme that is good for low Mach number flow is not able to give satisfactory simulation results for shock wave. Therefore, the aeroacoustic research community has been looking for a more efficient one‐step DAS scheme that has the comparable accuracy to the finite‐difference approach with smaller buffer regions, yet is able to give accurate solutions from subsonic to supersonic flows. The conservation element and solution element (CE/SE) scheme is one of the possible schemes satisfying the above requirements. This paper aims to report the development of a CE/SE scheme for one‐step DAS and illustrate its robustness and effectiveness with two selected benchmark problems.
URI: http://hdl.handle.net/10397/6029
ISBN: 978-0-7354-0936-1
ISSN: 0094-243X (print)
1551-7616 (eISSN)
DOI: 10.1063/1.3651880
Rights: ©2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in C. Y. Ho & et al., AIP Conf. Proc. 1376, 218-220 (2011) and may be found at http://link.aip.org/link/?apc/1376/218
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