Data assimilation of flow-acoustic resonance

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August undefined, 2024

WebMay 2, 2024 · This study proposes a sweeping jet as a novel solution to control catastrophic flow–acoustic resonance through a combined experimental and scale-adaptive … WebA data assimilation (DA) strategy was developed for accurate prediction of the flow-acoustic resonant fields within a channel-branch system. The challenges of numerical …

Data assimilation of flow-acoustic resonance. - Abstract

WebAug 18, 2024 · Abstract. This paper presents an experimental investigation of the vorticity shedding and the susceptibility of acoustic resonance excitation for a square tube array with an intermediate tube spacing (i.e., pitch-to-diameter ratio (P/D) of 1.73). The tube array could be rotated about an axis normal to the flow direction so that the effect of the flow … WebDec 15, 2024 · 1. Introduction. Flow-induced acoustic resonances in closed side branches are excited by an unstable separated shear flow, in which vortex-like structures form at the upstream edge of the branch and impinge at the downstream edge (Uchiyama and Morita, 2024).When the interaction and mutual enhancement between the unstable … dyskinetic septal wall motion

Acoustic resonance - Wikipedia

WebAcoustic resonance is a phenomenon in which an acoustic system amplifies sound waves whose frequency matches one of its own natural frequencies of vibration (its resonance frequencies).. The term "acoustic resonance" is sometimes used to narrow mechanical resonance to the frequency range of human hearing, but since acoustics is defined in … WebJun 1, 2024 · This website requires cookies, and the limited processing of your personal data in order to function. By using the site you are agreeing to this as outlined in our … WebThis paper focuses on flow-excited acoustic resonance of closed side-branches. First, a design guide that can be used to predict the onset and the intensity of resonance is … dyskinetic heart wall

Flow-excited acoustic resonances of coaxial side

Flow-Induced Acoustic Resonance of Finned Cylinders With …

Webadshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A WebJul 9, 2010 · Here we present further evidence derived from operating experience of full size steam generator and tubular heat exchanger tube banks of which 19 experienced acoustic vibration or acoustic resonance and 27 experienced no vibration or no acoustic resonance within the operating flow range. The present data show that the decisive … csc chicoutimiWebFeb 1, 2013 · At higher Mach numbers, we observe that the pressure pattern of the acoustic resonance modes (fundamental acoustic modes, first longitudinal acoustic modes, first longitudinal-depth acoustic modes) inside the cavity determines the directivity of the radiated noise. Links with experimental results are finally discussed. csc child info

"WebAcoustic resonance is a phenomenon in which an acoustic system amplifies sound waves whose frequency matches one of its own natural frequencies of vibration (its resonance … " - Data assimilation of flow-acoustic resonance

Data assimilation of flow-acoustic resonance

Flow-induced acoustic resonances in closed tandem side …

WebACOUSTIC-INDUCED VIBRATION AIV refers to structural vibration excited by intense acoustic pressure in a piping system with vapor flow. The acoustic pressure is usually created from pressure-reducing devices due to high pressure drops and mass flows of vapor services. These acoustic energies excite the pipe wall circumferentially due to WebTo accurately predict the characteristics of the three-dimensional flow fields of rotors, the constants of the shear stress transport model were optimized via data assimilation (DA) using the ...

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WebJun 1, 2024 · A data assimilation (DA) strategy was developed for accurate prediction of the flow-acoustic resonant fields within a channel-branch system. The challenges of … WebOct 1, 2024 · In this work, the flow-induced acoustic resonance in square closed side branches is investigated experimentally to clarify the resonance mechanism. Three …

WebApr 28, 2009 · A numerical simulation of the flow-excited acoustic resonance for the case of two-tandem cylinders in cross-flow is performed. The spacing ratio between the cylinders (L/D=2.5) is inside the proximity interference region. Similar simulation is performed for the case of a single cylinder. The unsteady flow field is simulated using a finite-volume … WebJan 1, 2011 · The data-assimilated flow-acoustic resonant fields were then comprehensively validated in terms of their acoustic fields, time-averaged flow fields, and phase-dependent flow fields.

WebAug 28, 2015 · The Pump Symposium proceedings have many case studies of resonance (BB3 long crossovers being the most common location). Just got to the link below and type in acoustic resonance as the search ... WebOct 3, 2024 · The frequency of vortex shedding can be estimated by following the guidance of Ziada and Shine [1]. If vibration data taken with accelerometers and strain gauges suggest an acoustic resonance at …

WebApr 10, 2024 · Cold and dense water from the North Pacific Ocean that spills through the Luzon Strait, the only deep conduit between the South China Sea (SCS) and the Pacific Ocean, renews deep-water mass ...

WebJul 24, 2024 · A novel theoretical model of the internal flow field in multistage axial compressors based on an eigenvalue approach is developed, in order to predict the onset of acoustic resonance in aircraft engines. Using an example high-speed four-stage compressor, it is shown that one of the resultant frequencies is in excellent agreement … dyskinetische zerebralparese physiotherapieWebJun 14, 2024 · The data-assimilated flow-acoustic resonant fields were then comprehensively validated in terms of their acoustic fields, time-averaged flow fields, and phase-dependent flow fields. The time-averaged flow fields were obtained from planar … A data assimilation (DA) strategy was developed for accurate prediction of the … A data assimilation (DA) strategy was developed for accurate prediction of the … dyskinetic septum heart csc chicago po box 7410023WebMay 27, 2024 · Abstract. The present work concentrates on the simulation enhancement of steam flow through a control valve using the data assimilation (DA) approach based on … dyskratische diatheseWebOct 18, 2016 · The acoustic data assimilation (ADA), which melds instant observed data of different natures and various physical models, has recently been developed as a new … csc child protectionWebFeb 22, 2024 · This study aims to detect the unsteady features of the turbulent flow behind a wall-proximity rib using resolvent analysis, based on the mean flow field determined using an adjoint-based data assimilation (ABDA) model. dyskinetic wall motion definitionWebJun 15, 2024 · A data assimilation (DA) strategy was developed for accurate prediction of the flow-acoustic resonant fields within a channel-branch system. The challenges of … dyskn exclusive eye cream