Matches in SemOpenAlex for { <https://semopenalex.org/work/W219582371> ?p ?o ?g. }
Showing items 1 to 69 of
69
with 100 items per page.
- W219582371 abstract "The problem of aerodynamic noise is considered following the Computational Aeroacoustics approach which is based on direct numerical simulation of the sound field. In the region of sound generation, the unsteady airflow is computed separately from the sound using Computational Fluid Dynamics (CFD) codes. Overlapping this region and extending further away is the acoustic domain where the linearised Euler equations governing the sound propagation in moving medium are solved numerically.After considering a finite volume technique of improved accuracy, preference is given to an optimised higher order finite difference scheme which is validated against analytical solutions of the governing equations. A coupling technique of two different CFD codes with the acoustic solver is demonstrated to capture the mechanism of sound generation by vortices hitting solid objects in the flow. Sub-grid turbulence and its effect 011sound generation has not been considered in this thesis.The contribution made to the knowledge of Computational Aeroacoustics can be summarised in the following: 1) Extending the order of accuracy of the staggered leap-frog method for the linearised Euler equations in both finite volume and finite difference formulations; 2) Heuristically determined optimal coefficients for the staggered dispersion relation preserving scheme; 3) A solution procedure for the linearised Euler equations involving mirroring at solid boundaries which combines the flexibility of the finite volume method with the higher accuracy of the finite difference schemes; 4) A method for identifying the sound sources in the CFD solution at solid walls and an expansion technique for sound sources inside the flow; 5) Better understanding of the three-level structure of the motions in air: mean flow, flow perturbations, and acoustic waves. It can be used, together with detailed simulation results, in the search for ways of reducing the aerodynamic noise generated by propellers, jets, wind turbines, tunnel exits, and wind-streamed buildings." @default.
- W219582371 created "2016-06-24" @default.
- W219582371 creator A5052305903 @default.
- W219582371 date "1998-09-01" @default.
- W219582371 modified "2023-09-24" @default.
- W219582371 title "Numerical techniques for computational aeroacoustics" @default.
- W219582371 hasPublicationYear "1998" @default.
- W219582371 type Work @default.
- W219582371 sameAs 219582371 @default.
- W219582371 citedByCount "2" @default.
- W219582371 crossrefType "dissertation" @default.
- W219582371 hasAuthorship W219582371A5052305903 @default.
- W219582371 hasConcept C120763676 @default.
- W219582371 hasConcept C121332964 @default.
- W219582371 hasConcept C121684219 @default.
- W219582371 hasConcept C13393347 @default.
- W219582371 hasConcept C134306372 @default.
- W219582371 hasConcept C1633027 @default.
- W219582371 hasConcept C181330731 @default.
- W219582371 hasConcept C196558001 @default.
- W219582371 hasConcept C24890656 @default.
- W219582371 hasConcept C33923547 @default.
- W219582371 hasConcept C38409319 @default.
- W219582371 hasConcept C50478463 @default.
- W219582371 hasConcept C57879066 @default.
- W219582371 hasConcept C62884695 @default.
- W219582371 hasConcept C68115822 @default.
- W219582371 hasConceptScore W219582371C120763676 @default.
- W219582371 hasConceptScore W219582371C121332964 @default.
- W219582371 hasConceptScore W219582371C121684219 @default.
- W219582371 hasConceptScore W219582371C13393347 @default.
- W219582371 hasConceptScore W219582371C134306372 @default.
- W219582371 hasConceptScore W219582371C1633027 @default.
- W219582371 hasConceptScore W219582371C181330731 @default.
- W219582371 hasConceptScore W219582371C196558001 @default.
- W219582371 hasConceptScore W219582371C24890656 @default.
- W219582371 hasConceptScore W219582371C33923547 @default.
- W219582371 hasConceptScore W219582371C38409319 @default.
- W219582371 hasConceptScore W219582371C50478463 @default.
- W219582371 hasConceptScore W219582371C57879066 @default.
- W219582371 hasConceptScore W219582371C62884695 @default.
- W219582371 hasConceptScore W219582371C68115822 @default.
- W219582371 hasLocation W2195823711 @default.
- W219582371 hasOpenAccess W219582371 @default.
- W219582371 hasPrimaryLocation W2195823711 @default.
- W219582371 hasRelatedWork W148494116 @default.
- W219582371 hasRelatedWork W1533380785 @default.
- W219582371 hasRelatedWork W1971820929 @default.
- W219582371 hasRelatedWork W1987127941 @default.
- W219582371 hasRelatedWork W1999564134 @default.
- W219582371 hasRelatedWork W2032846258 @default.
- W219582371 hasRelatedWork W2068362853 @default.
- W219582371 hasRelatedWork W2079465556 @default.
- W219582371 hasRelatedWork W2079687568 @default.
- W219582371 hasRelatedWork W2080601039 @default.
- W219582371 hasRelatedWork W2083108047 @default.
- W219582371 hasRelatedWork W2087810823 @default.
- W219582371 hasRelatedWork W2156769587 @default.
- W219582371 hasRelatedWork W2157194264 @default.
- W219582371 hasRelatedWork W2281051866 @default.
- W219582371 hasRelatedWork W2310442197 @default.
- W219582371 hasRelatedWork W2322430721 @default.
- W219582371 hasRelatedWork W3179876766 @default.
- W219582371 hasRelatedWork W77565898 @default.
- W219582371 hasRelatedWork W3196292278 @default.
- W219582371 isParatext "false" @default.
- W219582371 isRetracted "false" @default.
- W219582371 magId "219582371" @default.
- W219582371 workType "dissertation" @default.