| Title | Sound generated by axisymmetric non-plane entropy waves passing through flow contractions |
| Author | |
| Corresponding Author | Yang, Dong |
| Publication Years | 2022-06-01
|
| DOI | |
| Source Title | |
| ISSN | 1475-472X
|
| EISSN | 2048-4003
|
| Volume | 21Pages:521-536 |
| Abstract | For a single-component perfect gas, entropy perturbations are associated with the difference between the overall density fluctuation and that coming from the acoustic perturbation. Entropy perturbations can generate sound when accelerated/decelerated by a non-uniform flow and this is highly relevant to thermoacoustic instabilities for gas turbines and rocket engines, and to noise emission for aero-engines. Widely used theories to model this entropy-generated sound rely on quasi-1D assumptions for which questions of validity were raised recently from both numerical and experimental studies. In the present work, we build upon an acoustic analogy theory for this problem. This theory was initiated by Morfey (J. Sound Vib. 1973) and Ffowcs Williams and Howe (J. Fluid Mech. 1975) about 50 years ago and extended recently by Yang, Guzman-Inigo and Morgans (J. Fluid Mech. 2020) to study the effect of non-plane entropy waves at the inlet of a flow contraction on its sound generation. Comparisons against both numerical simulations and previous theory are performed to validate the results. |
| Keywords | |
| URL | [Source Record] |
| Indexed By | |
| Language | English
|
| SUSTech Authorship | First
; Corresponding
|
| Funding Project | European Research Council (ERC)[772080]
|
| WOS Research Area | Acoustics
; Engineering
; Mechanics
|
| WOS Subject | Acoustics
; Engineering, Aerospace
; Mechanics
|
| WOS Accession No | WOS:000815126400001
|
| Publisher | |
| EI Accession Number | 20222612298040
|
| EI Keywords | Acoustic emissions
; Acoustic noise
; Acoustic properties
; Aircraft engines
; Rockets
; Thermoacoustics
|
| ESI Classification Code | Thermodynamics:641.1
; Aircraft Engines, General:653.1
; Rockets and Missiles:654.1
; Acoustics, Noise. Sound:751
; Acoustic Properties of Materials:751.2
; Acoustic Noise:751.4
|
| Data Source | Web of Science
|
| Citation statistics |
Cited Times [WOS]:1
|
| Document Type | Journal Article |
| Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/347934 |
| Department | Department of Mechanics and Aerospace Engineering |
| Affiliation | 1.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, 1088 Xueyuan Ave, Shenzhen 518055, Peoples R China 2.Imperial Coll London, Dept Mech Engn, London, England |
| First Author Affilication | Department of Mechanics and Aerospace Engineering |
| Corresponding Author Affilication | Department of Mechanics and Aerospace Engineering |
| First Author's First Affilication | Department of Mechanics and Aerospace Engineering |
| Recommended Citation GB/T 7714 |
Yang, Dong,Guzman-Inigo, Juan,Morgans, Aimee S.. Sound generated by axisymmetric non-plane entropy waves passing through flow contractions[J]. International Journal of Aeroacoustics,2022,21:521-536.
|
| APA |
Yang, Dong,Guzman-Inigo, Juan,&Morgans, Aimee S..(2022).Sound generated by axisymmetric non-plane entropy waves passing through flow contractions.International Journal of Aeroacoustics,21,521-536.
|
| MLA |
Yang, Dong,et al."Sound generated by axisymmetric non-plane entropy waves passing through flow contractions".International Journal of Aeroacoustics 21(2022):521-536.
|
| Files in This Item: | There are no files associated with this item. | |||||
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