Data assimilation of flow-acoustic resonance

Author: tlwu

August undefined, 2024

WebJan 5, 2010 · Flow-Excited Acoustic Resonance in Industry. The excitation mechanism of acoustic resonances has long been recognized, but the industry continues to be … WebFeb 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.

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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 … 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 ... chilled meat locations genshin impact

Control of Flow–Acoustic Resonance Using Sweeping Jets

WebMar 30, 2024 · Abstract. Acoustic resonances in internal flows can cause noise, vibration, and even equipment damage. One geometry prone to acoustic resonance is a deadleg at the point where the main flow turns into a side branch. Here, we report experimental and computational fluid dynamics (CFD) studies of flow-generated pulsation in such a … WebFeb 11, 2024 · Abstract. The flow-excited acoustic resonance phenomenon, which is instigated by periodic flow perturbation, leads to the generation of acute sound pressure. In this work, we investigated the characteristics of the flow-excited acoustic resonance for circular finned cylinders with different fin heights. The fin height is expressed as a … 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 … grace dickson productions

Vorticity Shedding and Acoustic Resonance Excitation of a …

WebAs shown in Fig. 2.32, acoustic resonances are classified into two types depending on the acoustic mode shape; Fig. 2.32(a) shows the form of the first type of excitation where the acoustic resonant modes are dominant in the direction perpendicular both to the gas flow and the tube axes. The second type is shown in Fig. 2.32(b).In this case, the acoustic … 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 … chilled meat wow wotlkWebApr 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 ... grace detective books

"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 … " - Data assimilation of flow-acoustic resonance

Data assimilation of flow-acoustic resonance

Data Assimilation of Steam Flow Through a Control Valve Using …

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 … WebMar 21, 2024 · Abstract. We measured gas flows exiting large, un-thermostated, gas-filled, pressure vessels by tracking the time-dependent pressure P (t) and resonance frequency fN (t) of an acoustic mode N of the gas remaining in each vessel. This is a proof-of-principle demonstration of a gas-flow standard that uses P (t), fN (t), and literature values of ...

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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 … WebFeb 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.

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 … 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 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 … WebJan 1, 2009 · Flow-excited acoustic resonance of closed side-branches is caused by a feedback mechanism between the instability of the free shear layer at the mouth of the …

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WebFeb 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 … chilled meat wow classicWebAug 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 … grace dictionary definitionWebAcoustic 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 … grace devotionals for womenWebACOUSTIC-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 gracedieu ballyboughal dublinWebDec 3, 2024 · Flow–acoustic resonance in a cavity covered by a perforated plate - Volume 884. ... This list is generated based on data provided by Crossref. Bilgili, Serdar Ugarte, Orlando and Akkerman, V’yacheslav 2024. Interplay of Kelvin–Helmholtz instability with acoustics in a viscous potential flow. Physics of Fluids, Vol. 32, Issue. 8, p. 084108. grace devotional booksWebApr 30, 2024 · The reconstruction performances of the proposed Navier–Stokes-based data-assimilation approach for single-instant velocity measurements (NS-DA-SIM) are assessed using a numerical dataset for the 3D flow past a cylinder. Comparisons with existing data assimilation methodologies allow to further illustrate the merits of the … grace dickler cook county judgeWebApr 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 … grace detective brighton