Matches in SemOpenAlex for { <https://semopenalex.org/work/W4385890293> ?p ?o ?g. }
Showing items 1 to 61 of
61
with 100 items per page.
- W4385890293 abstract "Response details are presented of small-scale Helmholtz resonators excited by grazing turbulent boundary layer flow. A particular focus lies on scaling of the resonance, in relation to the spatio-temporal characteristics of the near-wall velocity and wall-pressure fluctuations. Resonators are tuned to different portions of the inner-spectral peak of the boundary-layer wall-pressure spectrum, at a spatial scale of $lambda_x^+ approx 250$ (or temporal scale of $T^+ approx 25$). Following this approach, small-scale resonators can be designed with neck-orifice diameters of minimum intrusiveness to the grazing flow. Here we inspect the TBL response by analysing velocity data obtained with hot-wire anemometry and particle image velocimetry measurements. This strategy follows the earlier work by Panton and Miller (J. Acoust. Soc. Am. 526, 800, 1975) in which only the change in resonance frequency, due to the grazing flow turbulence, was examined. Single resonators are examined in a boundary layer flow at $Re_tau approx 2,280$. Two neck-orifice diameters of $d^+ approx 68$ and 102 are considered, and for each value of $d^+$ three different resonance frequencies are studied (targeting the spatial scale of $lambda_x^+ approx 250$, as well as sub- and super-wavelengths). Passive resonance only affects the streamwise velocity fluctuations in the region $y^+ lesssim 25$, while the vertical velocity fluctuations are seen in a layer up to $y^+ approx 100$. A narrow-band increase in streamwise turbulence kinetic energy at the resonance scale co-exists with a more than 20% attenuation of lower-frequency (larger scale) energy. Current findings inspire further developments of passive surfaces that utilize the concept of changing the local wall-impedance for boundary-layer flow control, using miniature resonators as a meta-unit." @default.
- W4385890293 created "2023-08-17" @default.
- W4385890293 creator A5024199096 @default.
- W4385890293 creator A5027444605 @default.
- W4385890293 creator A5092801514 @default.
- W4385890293 date "2023-08-15" @default.
- W4385890293 modified "2023-09-27" @default.
- W4385890293 title "Inner-scaled Helmholtz resonators with grazing turbulent boundary layer flow" @default.
- W4385890293 doi "https://doi.org/10.48550/arxiv.2308.07776" @default.
- W4385890293 hasPublicationYear "2023" @default.
- W4385890293 type Work @default.
- W4385890293 citedByCount "0" @default.
- W4385890293 crossrefType "posted-content" @default.
- W4385890293 hasAuthorship W4385890293A5024199096 @default.
- W4385890293 hasAuthorship W4385890293A5027444605 @default.
- W4385890293 hasAuthorship W4385890293A5092801514 @default.
- W4385890293 hasBestOaLocation W43858902931 @default.
- W4385890293 hasConcept C111603439 @default.
- W4385890293 hasConcept C111919701 @default.
- W4385890293 hasConcept C120665830 @default.
- W4385890293 hasConcept C121332964 @default.
- W4385890293 hasConcept C139210041 @default.
- W4385890293 hasConcept C184779094 @default.
- W4385890293 hasConcept C18903297 @default.
- W4385890293 hasConcept C194242075 @default.
- W4385890293 hasConcept C196558001 @default.
- W4385890293 hasConcept C2777894999 @default.
- W4385890293 hasConcept C41008148 @default.
- W4385890293 hasConcept C57879066 @default.
- W4385890293 hasConcept C86803240 @default.
- W4385890293 hasConcept C97126364 @default.
- W4385890293 hasConceptScore W4385890293C111603439 @default.
- W4385890293 hasConceptScore W4385890293C111919701 @default.
- W4385890293 hasConceptScore W4385890293C120665830 @default.
- W4385890293 hasConceptScore W4385890293C121332964 @default.
- W4385890293 hasConceptScore W4385890293C139210041 @default.
- W4385890293 hasConceptScore W4385890293C184779094 @default.
- W4385890293 hasConceptScore W4385890293C18903297 @default.
- W4385890293 hasConceptScore W4385890293C194242075 @default.
- W4385890293 hasConceptScore W4385890293C196558001 @default.
- W4385890293 hasConceptScore W4385890293C2777894999 @default.
- W4385890293 hasConceptScore W4385890293C41008148 @default.
- W4385890293 hasConceptScore W4385890293C57879066 @default.
- W4385890293 hasConceptScore W4385890293C86803240 @default.
- W4385890293 hasConceptScore W4385890293C97126364 @default.
- W4385890293 hasLocation W43858902931 @default.
- W4385890293 hasOpenAccess W4385890293 @default.
- W4385890293 hasPrimaryLocation W43858902931 @default.
- W4385890293 hasRelatedWork W1610222278 @default.
- W4385890293 hasRelatedWork W1827909658 @default.
- W4385890293 hasRelatedWork W204166014 @default.
- W4385890293 hasRelatedWork W2080973411 @default.
- W4385890293 hasRelatedWork W2158011154 @default.
- W4385890293 hasRelatedWork W2301139710 @default.
- W4385890293 hasRelatedWork W2371289838 @default.
- W4385890293 hasRelatedWork W2392067110 @default.
- W4385890293 hasRelatedWork W3041822833 @default.
- W4385890293 hasRelatedWork W4256142691 @default.
- W4385890293 isParatext "false" @default.
- W4385890293 isRetracted "false" @default.
- W4385890293 workType "article" @default.