Matches in SemOpenAlex for { <https://semopenalex.org/work/W2019206834> ?p ?o ?g. }
Showing items 1 to 76 of
76
with 100 items per page.
- W2019206834 abstract "Thermo-acoustic instabilities and, more generally, the noise associated with combustion dynamics in high-performance combustion systems are of increasing concern to gas turbine manufacturers. One way to hinder these phenomena is to improve acoustic damping. A perforated plate with a bias flow can be very efficient in fulfilling this function, as long as it is properly designed. This system operates by converting incident acoustic energy into kinetic energy of the flow field, which is then quickly dissipated by turbulence. However this mechanism is not entirely understood, especially at high amplitude pressure fluctuations. The present study deals with the different responses of an orifice traversed by a bias flow, in linear and nonlinear regimes, when subjected to incident soundwaves. Large Eddy Simulation (LES) is used to analyze the flow field through the aperture, calculate its reflection and transmission coefficients and analyze sound absorption as a function of the perturbation level. It is shown that the velocity fluctuation level u0′ within the perforation plays a key role in the dissipation process. A transition occurs when u0′ exceeds the mean bias flow velocity within the orifice u0′ > u0 and reverse flow is observed, leading to major changes in the balance between reflection and transmission processes. It is however shown that absorption remains approximately independent of the sound level even at the high amplitudes simulated in the present paper up to u0′/u0 ∼ 10. The evolution with the perturbation level of the unsteady pressure loss through the perforation is then examined using different analytical models. Predictions are compared with simulation results. Differences are observed in the transition between the linear and nonlinear regimes." @default.
- W2019206834 created "2016-06-24" @default.
- W2019206834 creator A5016614777 @default.
- W2019206834 creator A5019183393 @default.
- W2019206834 creator A5031117101 @default.
- W2019206834 date "2011-01-01" @default.
- W2019206834 modified "2023-09-24" @default.
- W2019206834 title "A LES Based Sound Absorption Analysis of High-Amplitude Waves Through an Orifice With Bias Flow" @default.
- W2019206834 doi "https://doi.org/10.1115/gt2011-45639" @default.
- W2019206834 hasPublicationYear "2011" @default.
- W2019206834 type Work @default.
- W2019206834 sameAs 2019206834 @default.
- W2019206834 citedByCount "8" @default.
- W2019206834 countsByYear W20192068342012 @default.
- W2019206834 countsByYear W20192068342013 @default.
- W2019206834 countsByYear W20192068342014 @default.
- W2019206834 countsByYear W20192068342017 @default.
- W2019206834 countsByYear W20192068342018 @default.
- W2019206834 countsByYear W20192068342019 @default.
- W2019206834 crossrefType "proceedings-article" @default.
- W2019206834 hasAuthorship W2019206834A5016614777 @default.
- W2019206834 hasAuthorship W2019206834A5019183393 @default.
- W2019206834 hasAuthorship W2019206834A5031117101 @default.
- W2019206834 hasConcept C120665830 @default.
- W2019206834 hasConcept C121332964 @default.
- W2019206834 hasConcept C127413603 @default.
- W2019206834 hasConcept C135402231 @default.
- W2019206834 hasConcept C180205008 @default.
- W2019206834 hasConcept C194242075 @default.
- W2019206834 hasConcept C196558001 @default.
- W2019206834 hasConcept C205904022 @default.
- W2019206834 hasConcept C24890656 @default.
- W2019206834 hasConcept C57879066 @default.
- W2019206834 hasConcept C68115822 @default.
- W2019206834 hasConcept C78519656 @default.
- W2019206834 hasConcept C97355855 @default.
- W2019206834 hasConceptScore W2019206834C120665830 @default.
- W2019206834 hasConceptScore W2019206834C121332964 @default.
- W2019206834 hasConceptScore W2019206834C127413603 @default.
- W2019206834 hasConceptScore W2019206834C135402231 @default.
- W2019206834 hasConceptScore W2019206834C180205008 @default.
- W2019206834 hasConceptScore W2019206834C194242075 @default.
- W2019206834 hasConceptScore W2019206834C196558001 @default.
- W2019206834 hasConceptScore W2019206834C205904022 @default.
- W2019206834 hasConceptScore W2019206834C24890656 @default.
- W2019206834 hasConceptScore W2019206834C57879066 @default.
- W2019206834 hasConceptScore W2019206834C68115822 @default.
- W2019206834 hasConceptScore W2019206834C78519656 @default.
- W2019206834 hasConceptScore W2019206834C97355855 @default.
- W2019206834 hasLocation W20192068341 @default.
- W2019206834 hasOpenAccess W2019206834 @default.
- W2019206834 hasPrimaryLocation W20192068341 @default.
- W2019206834 hasRelatedWork W1970158002 @default.
- W2019206834 hasRelatedWork W1980372150 @default.
- W2019206834 hasRelatedWork W1991669265 @default.
- W2019206834 hasRelatedWork W1992985804 @default.
- W2019206834 hasRelatedWork W2003968787 @default.
- W2019206834 hasRelatedWork W2019295495 @default.
- W2019206834 hasRelatedWork W2045483452 @default.
- W2019206834 hasRelatedWork W2049471632 @default.
- W2019206834 hasRelatedWork W2052401519 @default.
- W2019206834 hasRelatedWork W2061323833 @default.
- W2019206834 hasRelatedWork W2075918029 @default.
- W2019206834 hasRelatedWork W2078105755 @default.
- W2019206834 hasRelatedWork W2131376359 @default.
- W2019206834 hasRelatedWork W2155650413 @default.
- W2019206834 hasRelatedWork W2174187756 @default.
- W2019206834 hasRelatedWork W2175085955 @default.
- W2019206834 hasRelatedWork W2312666550 @default.
- W2019206834 hasRelatedWork W2332100616 @default.
- W2019206834 hasRelatedWork W775052757 @default.
- W2019206834 hasRelatedWork W2166324874 @default.
- W2019206834 isParatext "false" @default.
- W2019206834 isRetracted "false" @default.
- W2019206834 magId "2019206834" @default.
- W2019206834 workType "article" @default.