Enviar artigo por via de e-mail On the evolution of the shock waves systems created by the fan blades
- Autores: Yudin M.A.1, Kopiev V.F.1, Chernyshev S.A.1, Faranosov G.A.1, Demyanov M.A.1, Bychkov O.P.1
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Afiliações:
- FAU TsAGI, Research Moscow Complex TsAGI
- Edição: Volume 70, Nº 3 (2024)
- Páginas: 47-57
- Seção: НЕЛИНЕЙНАЯ АКУСТИКА
- URL: https://ruspoj.com/0320-7919/article/view/648396
- DOI: https://doi.org/10.31857/S0320791924030054
- EDN: https://elibrary.ru/ZMNRKM
- ID: 648396
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Resumo
Fan is one of the noise sources in a modern engine. The fan noise is especially noticeable during takeoff at high angular rotation speeds. In such operating modes, supersonic flow around the tips of the fan blades is realized, which leads to the formation of shock waves that propagate upstream until they exit of the engine channel. As a result, a specific noise is emitted into the front hemisphere, consisting of harmonics that are multiples of the fan rotation frequency. The paper analyzes the described effect based on a simple model of the propagation of a shock waves system. By using energy analysis, it is shown that the system of shock waves with equal amplitude decays faster than a system of shock waves with a spread in amplitude.
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Sobre autores
M. Yudin
FAU TsAGI, Research Moscow Complex TsAGI
Autor responsável pela correspondência
Email: mikleudin@ya.ru
Rússia, st. Radio 17, Moscow, 105005
V. Kopiev
FAU TsAGI, Research Moscow Complex TsAGI
Email: mikleudin@ya.ru
Rússia, st. Radio 17, Moscow, 105005
S. Chernyshev
FAU TsAGI, Research Moscow Complex TsAGI
Email: mikleudin@ya.ru
Rússia, st. Radio 17, Moscow, 105005
G. Faranosov
FAU TsAGI, Research Moscow Complex TsAGI
Email: mikleudin@ya.ru
Rússia, st. Radio 17, Moscow, 105005
M. Demyanov
FAU TsAGI, Research Moscow Complex TsAGI
Email: mikleudin@ya.ru
Rússia, st. Radio 17, Moscow, 105005
O. Bychkov
FAU TsAGI, Research Moscow Complex TsAGI
Email: mikleudin@ya.ru
Rússia, st. Radio 17, Moscow, 105005
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